---
title: "New Windows Cost Guide (UK Prices 2026)"
description: "How much do new windows cost? This guide breaks down window prices, including examples like the average cost of new windows for a 3-bed house in the UK & more."
url: "https://www.myjobquote.co.uk/costs/new-window-costs"
last_updated: "2026-10-20"
---

# New Windows Cost

 At a Glance

- The average cost of new windows for a 3 bed house in the UK is around £3,750.
- The job takes between 1 and 2 hours per window.

 **In this guide, you'll discover the following:**

- **NEW!** Try our window prices calculator to get an instant estimate for your home.
- A complete cost breakdown for different house sizes and window styles.
- How much window fitting labour costs, how long the job takes, and what's involved.
- How to find and hire a local window fitter using MyJobQuote.

  [Get free estimates](https://www.myjobquote.co.uk/windows-conservatories) **Are you a trade? [Get more work today!](https://www.myjobquote.co.uk/tradespeople-signup)**

### Average Cost of New Windows for a 3 Bed House in the UK:

#### Depending on the complexity of the installation, it usually takes: 1 – 2 hours per window

##### £3,750

## New Window Cost Calculator

## Double Glazed Windows Cost by Frame Material

The frame material you choose for your window frames is the biggest factor influencing the total cost (and therefore your window prices and overall new windows cost), alongside your double glazing specification (and whether you upgrade to triple glazing).

If you're pricing up replacement windows for the whole house, these two choices tend to move the quote the most, and they're usually the biggest drivers behind the cost of new windows overall.

uPVC casement windows (and most uPVC windows) are the most popular and affordable option, and uPVC windows are typically the quickest for fitters to price and replace like-for-like, while timber window frames (often called wooden windows) are a premium choice (especially for sash windows).

Which material would you like for your new window frames?

uPVC (standard/coloured)

73 votes - 77%77% of votes

Aluminium

5 votes - 5%5% of votes

Timber

11 votes - 12%12% of votes

Composite

6 votes - 6%6% of votes

 **95 votes** See results Hide results

The prices in this section reflect typical window prices as a total cost, *including* materials and professional installation, for standard casement double glazed windows (fitted), in other words, typical casement windows. If you're looking for a more exact price estimate, try our window replacement cost calculator above.

| Frame Material | Small (600 x 900mm) | Medium (900 x 1200mm) | Large (1200 x 1200mm) |
|---|---|---|---|
| **White uPVC** | £300–£450 | £450–£600 | £550–£700 |
| **Coloured uPVC** | £330–£500 | £500–£660 | £600–£770 |
| **Aluminium** | £550–£750 | £700–£900 | £800–£1,100 |
| **Timber** | £850–£1,100 | £1,200–£1,500 | £1,400–£1,800 |
| **Composite** | £900–£1,500 | £1,100–£1,700 | £1,300–£1,900 |

### uPVC Windows Prices

uPVC windows are the most popular and affordable option in the UK.

**For most homes, casement windows (including standard uPVC casement windows) in white uPVC sit between £300 and £700, including fitting.**  uPVC window frames are usually the quickest for installers to swap like-for-like.

### Aluminium Windows Prices

Aluminium windows offer a sleek, contemporary appearance with slim sight-lines and outstanding durability.

If you're comparing frame types, aluminium windows are a strong mid-to-premium option. **Expect to pay around £550 to £1,100 per window, including installation with double glazing.** Their inherent strength allows for larger panes and slimmer frames than uPVC, even compared to casement windows.

Aluminium is ideal for modern homes and extensions, and while it costs roughly 25% more than uPVC, it offers excellent longevity with minimal maintenance. This window type suits bigger openings thanks to its strength. Powder-coated finishes are available in a wide range of colours.

### Timber Window Prices

Timber frames (wooden windows) bring a warm, natural look that suits traditional or period properties, and are often chosen for sash windows.

**Prices for timber frames typically range from £850 to £1,800 per window, including fitting with double glazing.** Softwood options like pine are at the lower end, while hardwoods such as oak can exceed £1,800, and sash windows in timber are usually at the pricier end of the range.

Timber requires more upkeep, including periodic repainting or varnishing, but can last for 40 years or more with proper care. It's a premium option, but one that adds timeless character, especially if you're keeping the look of original window frames.

### Composite Window Prices

Composite windows combine the benefits of multiple materials, typically featuring a warm timber interior bonded to a strong, weather-resistant aluminium exterior. This hybrid design provides the natural look of wood inside the home with the durability of metal outside.

**Prices usually range from £900 to £1,900 per window, including professional installation with double glazing.** Although they are the most expensive option, composite frames deliver exceptional longevity, excellent thermal and acoustic insulation, and require virtually no exterior maintenance.

They're a good choice if you're looking for top-tier performance with premium aesthetics.

## Window Replacement Cost by Style

After the frame material, the style of the window is the next biggest factor affecting the price and overall window prices (and the total new windows cost).

All prices below are average fitted costs for a standard-sized (approx. 900 x 1200mm) replacement window with double glazing in white uPVC unless stated otherwise, as double glazing is the most common spec for UK homes (triple glazing will increase the price).

| Window Style | uPVC | Aluminium | Timber |
|---|---|---|---|
| **Casement** | £350–£550 | £600–£850 | £750–£1,100 |
| **Tilt and Turn** | £500–£700 | £750–£1,000 | £900–£1,200 |
| **Sash (Sash Windows)** | £700–£1,100 | £1,100–£1,400 | £1,500–£2,000 |
| **Bay (3-Section)** | £1,500–£2,500 | £2,000–£3,000 | £2,500–£3,500 |
| **Velux (Small, Manual)** | £650–£1,100 | £800–£1,300 | £950–£1,400 |

### Casement Window Cost

Casement windows are the UK's most common and generally most affordable style.

Most replacement windows you'll see quoted are casement windows, and casement windows are usually the easiest style to replace like-for-like. They are hinged on one side (or the top) and swing outwards.

**A typical white [uPVC casement window](https://www.myjobquote.co.uk/costs/upvc-windows-cost) (one of the most common types of casement windows) with double glazing costs between £350 and £550, including fitting.**

### Tilt and Turn Windows Cost

These versatile windows offer two opening functions: tilting inwards from the top for secure ventilation, or opening fully inwards like a door for easy cleaning.

They are slightly more expensive than standard casement windows, **costing around £500 to £700 per window with double glazing fitted.**

We're replacing all the windows and quite like the tilt and turn style. How much more do they cost than standard casements, roughly?

"Tilt and turn windows are dearer, approximately £100 to £150 more per window."

 [Braveheart Windows and Doors Ltd](https://www.myjobquote.co.uk/t/braveheart-windows-and-doors-ltd)

### Sash Windows Cost

Sash windows feature one or two panels that slide vertically. These sash windows are common in period homes, and sash windows usually cost more than casement windows because the mechanism is more complex.

**Expect to pay around £700 to £1,100 per uPVC sash window with double glazing, installed**, with timber sash windows often starting around £1,500 fitted, and sash windows can cost more again if the openings are non-standard.

### Bay Window Cost

[Bay windows](https://www.myjobquote.co.uk/costs/changing-your-bay-window) project outwards from the house, usually consisting of three or more window panels. The bay window cost is higher because a bay window often needs extra structural work.

**A 3-section uPVC bay window with double glazing typically costs from £1,500 to £2,500 fitted.**

### Velux Window Cost

Velux is a leading brand of roof windows, designed for loft conversions or extensions with sloping roofs. The cost varies significantly based on size, opening mechanism (manual, electric, solar), and the complexity of the roof work required.

**[Velux windows](https://www.myjobquote.co.uk/costs/velux-window-skylight) typically cost from £650 to £1,100 supplied and fitted** (usually with double glazing as standard). Larger or automated models can cost considerably more.

## Full House Window Replacement Cost

If you're replacing all your windows in one go, this section will be the quickest way to sense-check whether the cost you've been quoted is in the right ballpark.

The table below provides estimated total costs (including fitting) for replacing all windows across different housing types.

*Remember these are estimates, and the exact number of windows, sizes, style choices, and your location will influence the final quote, and it's why window prices can look wildly different from one home to the next.*

The price you pay for a composite window can vary significantly based on the specific materials used (e.g., Alu-clad timber vs uPVC/aluminium) and window specifications.

**Smaller homes — 2-bed terraces and 3-bed semis (roughly 6–10 windows):**

| Frame Material | 2-Bed Terrace (6 to 8 Win.) | 3-Bed Semi (8 to 10 Win.) |
|---|---|---|
| White uPVC | £2,250–£3,000 | £3,750 |
| Coloured uPVC | £2,500–£3,300 | £4,100–£4,500 |
| Aluminium | £3,000–£4,000 | £4,700–£5,600 |
| Timber (Softwood) | £5,500–£8,500 | £7,500–£12,000 |
| Composite | £6,500–£10,000 | £9,000–£15,000 |

**Larger detached homes — 4 and 5 bedrooms (roughly 10–20 windows):**

| Frame Material | 4-Bed Detached (10 to 15 Win.) | 5-Bed Detached (15 to 20 Win.) |
|---|---|---|
| White uPVC | £5,500–£7,000 | £7,500–£10,000 |
| Coloured uPVC | £6,000–£7,700 | £8,200–£11,000 |
| Aluminium | £7,000–£9,000 | £10,000–£13,000 |
| Timber (Softwood) | £11,000–£17,000 | £16,000–£25,000 |
| Composite | £13,000–£21,000 | £18,000–£30,000+ |

## What's Included in a New Window Quote?

You should always check your quote to see exactly what is included, but it will typically cover:

- Measurement and survey.
- Windows made to measure (double-glazed as standard).
- Old windows removed and disposed of.
- Fitting, fixing, sealing, and trims.
- Handles, locks, and trickle vents (standard quality).
- Certification (if choosing a FENSA or Certass-registered installer).
- Guarantee (ask for it in writing).

You will often have to pay extra for:

- Making good around the new windows.
- New window sills.
- Scaffolding, if needed for upper floor windows.
- Repairing damaged or rotten openings or lintels.
- Upgraded glazing or hardware, unless previously agreed.

## Glazing Costs: Double vs. Triple vs. Secondary

The type of glazing you choose significantly affects insulation, noise, and price.

Double glazing is the standard choice, and for most households, double glazing gives the best balance of cost and performance, while triple glazing windows and secondary glazing are useful in specific situations (especially if you're looking at secondary glazing for noise or listed-building constraints).

This table summarises the key differences in cost and performance between the glazing types, and how they typically affect window prices.

| Glazing Type | Average Cost (Per uPVC Window, Fitted) | Key Benefit |
|---|---|---|
| **Double Glazing** | £350–£600 | Strong thermal efficiency |
| **Triple Glazing** | £550–£900 | Maximum thermal efficiency |
| **Secondary Glazing** | £300–£500 | Excellent noise reduction |

### Double Glazing Costs (Standard)

Double glazing is the UK standard for new window installations. It uses two panes of glass separated by an insulating air or argon gas layer.

**For a standard white uPVC double-glazed casement window, you'll pay around £350 to £550 for having double glazing fitted.** If you're considering triple glazing, expect a higher price per window due to the extra pane and heavier unit.

Modern double glazing can reduce heat loss by up to 50% compared to single glazing, with U-values of 1.4 W/m²K or lower. It also helps reduce outside noise and lower energy bills, saving the average semi-detached home around £150 to £200 per year on heating costs.

### Triple Glazing Costs

[Triple glazing](https://www.myjobquote.co.uk/costs/triple-glazed-windows) adds a third pane of glass and an additional insulating gap, improving both thermal and acoustic performance. It's the most energy-efficient option, with U-values as low as 0.8 to 1.0 W/m²K.

**A comparable triple-glazed uPVC window typically costs between £550 and £900 fitted**, depending on the frame material and glass specification.

While the upfront cost is higher, it's ideal for cold climates or north-facing rooms where heat retention is critical. However, the extra weight can require stronger frames or reinforced hinges.

Is triple glazing always better than double? Just wondering before I start upgrading my windows.

"If you live in front of a motorway or near a busy airport perhaps triple glazing would be best, otherwise double glazing is just as beneficial and cheaper too."

 [Revive Windows & Doors](https://www.myjobquote.co.uk/t/revive-windows-doors)

### Secondary Glazing Costs

Secondary glazing is a retrofit option, installed inside existing windows to create a large insulating air gap.

It's often the best solution for listed buildings or conservation areas where replacing original window frames (including original sash windows) isn't allowed, and secondary glazing can also be a smart upgrade if you want better comfort without changing the external look.

**[Secondary glazing costs](https://www.myjobquote.co.uk/costs/secondary-glazing-cost) around £300 to £500 per window opening fitted.**

It provides surprisingly strong thermal performance (U-values around 1.8 to 2.0 W/m²K) and is especially effective at reducing noise. In fact, the wider gap between the panes often delivers better soundproofing than standard double glazing, even if you already have double glazing installed, which is why secondary glazing is popular for homes near busy roads.

## Window Installation Cost (Labour Only)

| House Size & Number of Windows | Labour Cost | Time Required |
|---|---|---|
| 2-Bed Terrace (6 to 8 windows) | £600–£1,200 | 1 to 2 Days |
| 3-Bed Semi-Detached (8 to 10 windows) | £800–£1,500 | 2 to 3 Days |
| 4-Bed Detached (10 to 15 windows) | £1,000–£2,250 | 3 to 4 Days |
| 5-Bed Detached (15 to 20 windows) | £1,500–£3,000 | 4 to 5 Days |

Window fitters in the UK typically include labour costs in the total new window price that you're quoted, so the cost of new windows is usually given as one figure "per window", rather than split into parts.

**You can expect labour to account for around 20% to 30% of the total cost of new windows, with the average cost of window fitting labour per window between £100 and £150.**

In some cases, you may instead be quoted a day rate for window fitting labour costs. A window fitter typically charges £175 to £300 per day. Most work in pairs, so expect to pay £350 to £600 per day for a two-person team. Day rates are often used if the project is complex or unusual (for example, large bay windows or older sash windows, which take longer to fit). Joiners also usually charge a day rate for their labour, often around £200 to £300 per day.

**The average window fitting team can replace around 4 to 6 standard-sized windows per day**, assuming that your windows are easily accessible, no complications arise, and no custom work is required. Complex installations, such as large bay windows, multi-storey work requiring scaffolding, or non-standard openings, will naturally take longer than simple ground-floor casement window replacements.

## Additional Costs of Replacing Windows

While quotes for new windows often include standard fitting and materials, several additional costs might arise depending on your specific project, and they can nudge window prices up.

These extras are often the bits that catch people out when they're trying to estimate the cost of new windows realistically.

### Scaffolding Hire

If you live in a multi-storey property or access to some windows is difficult, scaffolding will likely be required for safety.

The [cost of hiring scaffolding](https://www.myjobquote.co.uk/costs/cost-of-hiring-scaffolding) can add several hundred pounds per week to your project, although sometimes a smaller tower scaffold might suffice.

### Windowsill Replacement

Fitting new windows is the perfect time to replace old, damaged, or rotten window sills, especially timber ones.

The [cost to replace windowsills](https://www.myjobquote.co.uk/costs/window-sill-replacement) averages around £175 each, but varies significantly depending on the material (uPVC, wood, stone).

### Plastering

Removing old window frames can sometimes cause minor damage to the surrounding [plasterwork on internal walls](https://www.myjobquote.co.uk/costs/plastering-an-indoor-wall-cost). You may need to budget for a plasterer to 'make good' these areas after the new windows are fitted. This could cost around £35 to £40 per hour.

### Painting & Decorating

Following the installation and any necessary plaster repairs, you will likely need to redecorate the internal window reveals (the area around the window frame) and potentially touch up paintwork externally.

### Waste Disposal / Skip Hire

Most reputable window companies will include the removal and responsible disposal of your old windows in their quote. However, always confirm this.

If not included, you may need to arrange for disposal or hire a small skip, which could cost £100 to £200. If you're replacing old windows that are rotting, sticking, or letting in draughts, this is one of those "hidden" bits of the job that's worth factoring in.

### Upgraded Glass

Standard quotes are for energy-efficient double glazing, so double glazing is already priced in for most installs. Upgrades will increase the cost per window and can include:

- **Triple Glazing —** Offers maximum thermal efficiency, reducing heat loss by up to 50% compared to standard double glazing. It adds noticeable weight and typically costs £150 to £250 per window more than standard double glazing.
- **Acoustic Glass —** Features a special interlayer designed to reduce noise transmission, ideal if you live near a busy road or airport. Expect to pay £80 to £150 extra per window for soundproof glazing.
- **Laminated Glass —** Contains a thin plastic interlayer that holds the glass together if broken, improving both safety and security. It usually adds around £60 to £120 per window.
- **Toughened Safety Glass —** This is designed to shatter into small, blunt pieces when broken. It's required by building regulations in areas such as doors and low-level glazing, typically adding £40 to £100 per window.
- **Solar Control Glass —** Has a special coating to reduce solar heat gain, helping prevent overheating in conservatories or south-facing rooms. It usually costs £70 to £130 more per window.
- **Obscured Glass —** Often used for privacy in bathrooms, is available in a range of patterns and textures. Prices generally add £30 to £60 per window, depending on the pattern and finish.
- **Self-Cleaning Glass —** Can help reduce maintenance [costs such as window cleaning](https://www.myjobquote.co.uk/costs/windows-clean-com-res) (which typically costs £20 to £60 per visit), although cleaning is still needed from time to time. It has a coating that breaks down dirt in sunlight which is then washed off by rain and is ideal for hard-to-reach areas.

### Custom Windows

uPVC windows are usually made to measure with the custom sizing included as part of your quote. Off-the-shelf windows, mostly standard-size timber units from builders' merchants, are cheaper but may not fit your opening. Oversized or bespoke designs can cost up to 50% more than standard ones. If you need to enlarge or [create a new window opening](https://www.myjobquote.co.uk/costs/new-window-opening), the average cost is around £750.

If I'm planning to have wood frame windows installed, would it be better to use a window company or a joiner?

"This depends on the windows you want installed. Both can do the job, but the window company may be better for standard off-the-shelf windows. The joiner can also do this, but can also make and fit bespoke non-standard windows."

 [Richard Davis Cabinetry](https://www.myjobquote.co.uk/t/richard-davis-cabinetry)

### Enhanced Hardware

While standard handles and locks are included, you might choose to pay extra for premium finishes (e.g., chrome handles) or specific types of trickle vents. Standard trickle vents are typically included as part of the installation cost, though higher-end models or specific finishes (such as colour-matching, metal, or acoustic vents) may add around £10 to £40 per window.

It's also worth considering upgraded security features such as:

- **Multi-Point Locking Systems —** Secure the window at several points along the frame, all operated by a single handle. They make it much harder to force the sash open compared to older single-latch locks (a common weak point on older sash windows).
- **Internally Beaded Glazing —** Holds the glass unit in place from the inside, preventing anyone from removing the pane from outside the property.
- **Key-Lockable Handles —** Provide extra protection, allowing you to lock windows shut when away or at night.
- **Reinforced or Steel-Core Frames —** Found on some premium uPVC and aluminium models, these offer extra rigidity against impact or tampering.

Most windows include several of these features as standard, but higher-spec systems can add around £50 to £150 per window to the overall replacement cost.

### New Doors

It can be worthwhile to get new windows and doors fitted at the same time to save on labour and disposal costs and ensure a cohesive look throughout your home. Some contractors may offer a discount for doing window and door replacement together, so check when getting quotes.

A [new front door costs](https://www.myjobquote.co.uk/costs/new-front-door) around £1,000 on average, cheaper for uPVC and more expensive for aluminium. As a rough guide, you could expect to pay around £4,150 to £4,600 for new white uPVC windows and a front door on a 3-bedroom semi-detached house.

## Signs You Need New Windows

Sometimes repairing a window isn't enough, and it might be time to consider a replacement. However, you might be able to repair the problem if it's a simple issue and only affects one or two windows.

**New windows are best when:**

- Frames are badly damaged, rotten, or warped.
- Draughts persist despite resealing.
- Multiple windows are misting between the panes.
- Hinges or mechanisms are failing on several windows.
- Windows are single glazed or have low energy efficiency ratings.

**Repairing the window is usually sufficient if:**

- Only one [glass unit has blown](https://www.myjobquote.co.uk/costs/blown-windows).
- Draughts are coming from cracked sealant (you can have the [window resealed](https://www.myjobquote.co.uk/costs/resealing-windows-and-doors) instead of replaced).
- One handle or lock is failing.
- Condensation is on the room side of the glass.
- Sash windows have broken cords.

## Building Regulations and Planning Permission for New Window Installations

All new window installations in England and Wales must comply with the following [key regulations](https://www.planningportal.co.uk/permission/common-projects/doors-and-windows/building-regulations):

- **Thermal Performance —** Windows must have a U-value of 1.4 W/m²K or better, or a Window Energy Rating of Band B or above.
- **Safety Glass —** Toughened or laminated safety glass is required in area areas 800mm or less from the floor and in or next to a door up to 1500mm from the floor.
- **Ventilation —** Trickle vents or equivalent ventilation must be included in habitable rooms to maintain air quality and reduce condensation.
- **Fire Escape Windows —** In certain rooms, particularly bedrooms on upper floors, windows must open wide enough to serve as an emergency escape route.

The best way to ensure compliance is to hire a registered installer who can self-certify the installation and provide a compliance certificate once the work is complete.

Always keep your installer's scheme certificate (such as FENSA) or your building control certificate in a safe place. You'll need it if you decide to sell your property, as it proves the installation meets building regulations.

### Planning Permission for Windows

Planning permission is [generally not required](https://www.planningportal.co.uk/permission/common-projects/doors-and-windows/planning-permission) for straightforward window replacements if they are similar in appearance to the originals. This falls under 'Permitted Development' rights. It's also not usually needed for creating a new window opening, although this does need building regulations approval.

However, you will likely need planning permission if:

- You live in a designated area such as a National Park or conservation area (restrictions often apply to materials and styles).
- You live in a property with an Article 4 direction removing permitted development rights.
- You are installing a bay window where there wasn't one previously or adding a side-facing upper-floor window that's not obscure-glazed.
- The new windows are significantly different in appearance from the originals (especially on the principal elevation facing a highway).

If any of these apply, or if you are unsure, contact your local council's planning department before starting any work.

In listed buildings, secondary glazing is sometimes the easiest route because it can improve comfort without changing the original window frames, and secondary glazing is also easier to reverse later if rules change. You may need to obtain listed building consent, though.

## Key Factors When Choosing New Windows

Choosing new windows involves more than just picking a style and material. Several key performance factors will influence your comfort, security, and the final quote you receive.

Considering these aspects upfront will help you get the right windows for your home and budget.

### Energy Efficiency

New windows in the UK come with a Window Energy Rating (WER) shown on a rainbow label, similar to those on appliances.

[Ratings range from A++ (most efficient) down to E](https://www.bfrc.org/product-certification#rating). Higher-rated windows (typically A or above) provide better thermal insulation, reducing heat loss in winter and keeping your home cooler in summer. While A++ windows might have a slightly higher upfront cost, they can lead to greater savings on your energy bills over the window's lifespan.

Look for windows with low U-values (a measure of heat loss) and consider options with warm edge spacer bars and argon gas fillings for optimal performance, especially if you're upgrading to triple glazing.

### Security Features

Modern replacement windows are designed with security in mind, offering significant improvements over older frames and locks.

The most secure options are those tested to British Standards, particularly PAS 24, which verifies that the complete window unit, including frames, locks, and glazing, can resist common burglary techniques such as forced entry or levering.

When comparing quotes, ask installers which security features are included as standard. For peace of mind, look for products certified by the Secured by Design scheme, which recognises windows meeting police-endorsed security standards.

## How to Save on the Cost of New Windows

If you're looking to reduce overall costs, you can take on some of the preparation work yourself. Clearing the area and moving furniture away from the openings before your installer arrives can help speed up the job and lower labour costs slightly, especially if you've got old windows that have been painted shut or are awkward to remove.

You can also:

- [Compare quotes from multiple window installers using MyJobQuote.](https://www.myjobquote.co.uk/windows-conservatories)
- Choose standard glazing and white uPVC frames.
- [Repair rather than replace](https://www.myjobquote.co.uk/costs/new-window-costs#Signs) where possible.
- Replace multiple windows at once (it will cost more upfront but is often more cost-effective in the long term if you are planning to upgrade them all).
- Check for grants to help cover some of the cost.

Is it feasible for an average DIYer to install a sliding window, or should I really leave this to a professional?

"It may seem a simple task on the outside. However, there are a lot of things to consider when designing and installing even a simple window. As you are not aware of the issues that may arise, you will find this very difficult to fit and work on correctly. I would not advise this for DIY unless you are willing to spend again to correct your mistakes should they arise."

 [Green Island Renovations](https://www.myjobquote.co.uk/t/green-island-renovations)

## Checklist: Hiring a Window Installer in the UK

Ready to hire a [local window installer](https://www.myjobquote.co.uk/windows-conservatories)? Here's what you should keep in mind:

- **Are they qualified?** Check that your fitter has recognised qualifications or is registered with a competent person scheme such as [FENSA](https://www.fensa.org.uk) or [Certass](https://www.certass.co.uk) so they can self-certify the job in England and Wales.
- **Do they have insurance?** Make sure your fitter holds public liability insurance (typically £1 million or more) to cover accidental damage or injury during the job. Ask to see proof before work begins.
- **Can they provide references?** Ask for examples of previous installations, especially for similar property types or window styles. Reputable fitters will be happy to share photos or customer feedback.
- **Have they provided a written quote?** Always request a detailed written quote outlining materials, labour, VAT, and any optional extras like coloured frames or upgraded glazing. Avoid paying large deposits upfront.
- **Are the product specifications clear?** Check that your quote includes details of the exact products being fitted, such as frame material, glazing type, energy rating, and locking systems. This ensures you're comparing like-for-like between quotes.
- **Will they register your installation?** FENSA and Certass-registered installers can self-certify your new windows and issue a certificate to confirm compliance with building regulations. If your fitter isn't registered, you'll need to arrange an inspection through your local council instead.
- **Do they offer a warranty?** Look for companies that include a written guarantee on both the frames and glazing, ideally backed by an insurance policy. Most reputable installers offer at least a 10-year warranty.
- **Are payment terms clear?** Confirm when and how payments are due. Avoid paying the full amount upfront — a small deposit (typically 10% to 25%) is standard, with the balance due after completion and satisfaction checks.
- **Are they clear about timescales?** Confirm how long the installation will take, including lead times for manufacturing the windows. A typical replacement window job takes 1 to 5 days for a full house.

Following these steps will help you choose a qualified, fully insured window fitter who offers value, compliance, and peace of mind.

## FAQs

### What Is the Best Material for a Window Frame?

The most common and widely used material for window frames is uPVC. It is a plastic-like material, chosen for its durability, low maintenance and low cost compared to other materials such as hardwood and aluminium.

### What Warranties or Guarantees Come with New Windows?

Most new windows come with warranties covering the frame, glass, and installation. Coverage typically ranges from 5 to 20 years depending on the material and installer. You should always check the warranty before finalising the contract.

### Can I Transfer My Window Warranty to a New Homeowner?

Most window warranties can be transferred to the new owner if you sell your home, though some installers charge a small admin fee to update the details. Contact your installer or warranty provider directly to confirm the process and ensure the new owner receives all necessary documents.

### How Long Do New Windows Last?

The average lifespan is around 20 to 35 years for good quality, properly-installed and well-maintained double glazed windows.

### Are There Energy Efficiency Grants or Incentives for New Windows?

Homeowners in Great Britain may be eligible for grants or funding schemes such as the [Energy Company Obligation (ECO) scheme](https://www.ofgem.gov.uk/environmental-and-social-schemes/energy-company-obligation-eco) (due to end on 31 December 2026) or local council incentives. Check your council's website, speak with your installer, or consult your energy supplier to see what funding is available.

### Do New Windows Add Value to My Home?

Yes, new windows can add value to your home. They improve energy efficiency, which can lead to a better Energy Performance Certificate (EPC) rating, enhance the property's kerb appeal, and increase security. These improvements make your home more attractive to potential buyers and represent a good long-term investment.

### How Much Disruption Should I Expect During Window Installation?

Replacement windows inevitably involve some noise (drilling, hammering) and dust. Fitters usually work room by room to minimise disruption, typically completing several windows per day. They should use dust sheets to protect furniture and flooring.

### Can You Install New Windows Yourself?

It's possible to fit new windows yourself, but it's not generally recommended unless you have professional-level experience. Even small mistakes in alignment or sealing can lead to serious issues such as leaks, draughts, and heat loss. Incorrect installation can also invalidate product warranties and you will need building control approval in England and Wales — without it you won't have the certificate you'll need when selling your home.