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  • House Extension Cost

    Trying to find out how much a house extension costs? In this article we breakdown extension prices for all the different types including rear, lean-to, side, side return, wrap-around, porches, garages and even conservatories.

    Whether you're after a single or double storey extension, finding out how much it will cost has never been easier.

    By providing the cost of an extension per square metre we've made it simple for any homeowner to calculate how much their extension will cost them.

    Average Cost for building a house extension:

    Depending on the complexity of the job, it usually takes: 10 – 18 weeks

    £40,000

    How Much Does it Cost to Build a House Extension?

    When it comes to building an extension to the final cost will depend on a wide range of choices you make. The most important of those choices is the size and type of extension you choose to build. This is then followed by the level of finish you want.

    For a basic finish, with just the bare essentials built, you are looking at costs of £900 - £1.700 per m2. To upgrade to a high-quality finish, with top range and bespoke choices throughout the cost will be in the range of £1,750 - £2,200 per m2.

    You can lower your cost per meter square by building over more floors. The more floors you build, the cheaper the extra space is per m2. This is because a large percentage of the costs go towards building the foundations for the new space.

    The average cost of an extension is around £40,000.

    House Extension Prices

    The major cost factors that will affect the price of your house extension are the type of extension you choose, how big the extension will be, and the quality of the finish.

    Type of Extension

    The type of extension you chose will come with different costs to construct. To allow you to make a comparison, the following is the cost per m2 for different types of extension assuming a good quality finish throughout.

    Type of Extension Cost per m²
    Single Storey £1,700 - £1,900
    Double Storey £1,500 - £1,800
    Double + Loft £1,300 - £1,750

    Quality of Finish

    The quality of the finish will have a large impact on the final price per square meter of your home. These show you the variation based on a single storey extension

    Quality of finish Cost per m² for Single Storey Cost per m² for Double Storey Cost per m² for Double Storey + Loft
    Basic £1,000 - £1,700 £950 – £1,500 £900 - £1,300
    Good £1,700 - £1,900 £1,500 - £1,850 £1,300 - £1,750
    High £1,900 - £2,200 £1,850 - £2,200 £1,750 - £2,200

    Labour Costs and Timescales

    The total costs for labour will vary a great deal depending on the exact nature of the work that you have completed. The following is a rough idea of costs and timescale.

    Timescale and Labour Cost Based on Type of Extension

    Type of Extension Duration Average Labour Costs
    Lean-to 11 – 13 weeks £25,000 - £40,000
    Side Return 9 – 12 weeks £15,000 - £25,000
    Wrap Around 10 – 14 weeks £40,000 - £100,000
    Kitchen 10 – 14 weeks £25,000 - £100,000
    Double Storey Lean-to 16 – 18 weeks £40,000 - £60,000
    Double Storey Wrap Around 17 – 19 weeks £50,000 - £150,000

    Cost Per Hour of Different Tradesmen

    Tradesman Average cost per hour
    Builder £20 - £35
    Tiler £20 - £40
    Plumber £35 - £45
    Electrician £50 - £120
    Plasterer £30 - £50
    Decorator £20 - £50
    Joiner £35 - £45
    Roofer £30 - £40
    Kitchen Fitter £20 - £30

    Supply Only Costs

    In most cases, it is best to let your tradespeople source the majority of the materials for a project like an extension. If there are any problems and items, need to be returned, it is much easier for a tradesperson to do so than for a member of the public. However, to help you get a feel for the costs involved here are the costs of the materials you would need to fit out your extension once it is built.

    Flooring Costs

    Type Average cost per m²
    Vinyl £7 - £20
    Wood £17 - £70
    Carpet £4 - £40
    Tile £10 - £60

    Heating Costs

    Type of Heating Average Cost
    Traditional radiator £60 - £150
    Electric Radiator £150 - £300
    Underfloor Heating £100 - £150 per m²

    Window Costs

    Type Size (cm) Average Cost
    Velux 98 x 78 £325 - £375
    140 x 78 £400 - £450
    180 x 78 £500 -£550
    uPVC 60 x 90 £250 - £400
    90 x 120 £400 - £600
    120 x 120 £650 - £900

    Door Costs

    Type Average Cost
    Internal £50 – £200
    External £300 - £500
    Patio £300 - £1,000

    Kitchen Costs

    Item Average Cost
    Units with Doors and Handles £3,200 - £5,500
    Worksurface £200 – £2,000
    Appliances £1,500 - £5,000

    Bathroom Costs

    Fixture Average Cost
    Bath £80 - £500
    Shower £60 - £1,000
    Show enclosure £100 - £550
    Toilet £50 - £500
    Sink £50 - £300
    Taps £50 - £100

    Tile Costs

    Material Cost per m²
    Ceramic £12- £50
    Glass £110 - £160
    Granite £80 - £90
    Limestone £50 - £80
    Marble £40 - £70
    Porcelain £50 - £100
    Quarry £20 - £30
    Quartzite £70 - £100
    Quartz and Resin £80 - £90
    Slate £40 - £50
    Terracotta £50 - £60

    Lighting Costs

    Type of Lighting Average Cost
    Pendant/chandelier £40 - £100
    Simple ceiling or wall lamp £40 - £60
    Recessed Spotlights £80 - £110
    Dimmable ceiling or wall lights £80 - £100

    Kitchen Appliances

    Item Average Cost
    Fridge £400 - £1,200
    Fridge-Freezer £600 - £800
    American Style Fridge £500 - £1,300
    Chest Freezer £160 - £500
    Gas Hob £100 - £500
    Induction Hob £300 - £900
    Ceramic Hob £150 - £300
    Single Oven £500 - £1,100
    Double Oven £400 - £1,200
    Dish Washer £400 - £1,000

    Additional Costs

    When you are drawing up the budget for your project, there are a lot of costs you need to keep in mind. Some of the most common additional costs are listed here.

    Exterior House Painting

    paintinghouse

    If you home has a painted exterior already then you should consider getting the whole house painted as part of your building work. Otherwise, you will end up with parts of your home being a different colour. The average cost to paint the exterior of a home is £850.

    Garden Waste

    When you clear space for your new extension, this may generate a lot of garden waste. You will need to dispose of this garden waste. The average cost for this is £150.

    House Rewire

    When you get an extension built, your whole house will be inspected to make sure it meets building regulations. In some older homes, this can mean that the wiring and electrics need some updating. The lowest cost case is when you just need to replace the consumer box. This costs on average £500. If there are problems with the wiring, then it can cost £4,000 on average to rewire a home.

    New Boiler

    You should check if your current boiler will be able to support the additional load your extension will add. It might be necessary to get a new boiler while you are having work done. The average cost is £1,500 - £2,500. This includes supply and installation costs.

    Removing Drains

    The location of your drain may cause a problem when you build your extension. If you are not sure of their location and state, it can be worth getting a drain survey completed. The cost of a survey is around £250. If it identifies a need to move a drain this will add £200 -£1,300 to your total build costs.

    Underfloor Heating

    underfloorheating

    Underfloor heating is an energy-efficient way to heat your home. When you build an extension is provides an excellent opportunity to lay the pipework. The average cost to lay new underfloor heating during building work is £800.

    Site Survey

    A site survey can be a good place to start with a large project like this. It will alert you to any possible problems that might arise down the line. If you know about issues early on, you can plan for them. Reacting when they are found can be a costly policy. A site survey should cost £600 - £1,400.

    Insurance

    If you move out while the building work is done, you will need to get additional insurance for your home. You need to get a bundle that includes public liability insurance, employer’s liability insurance and construction. A reasonable price for this is £500 - £800.

    Skip Hire

    A skip is a necessary part of having building work done on your home. This is especially true during an extension. This is because there is a lot of rubble created when the walls are broken through. Skip hire may not be included in your contractor's quote. In which case you should add £250 - £450 to your budget.

    Kitchen Added

    Adding a new kitchen to your extension will have a big impact on your costs. The quality and type of appliances you choose can add an extra £3,000 - £10,000.

    Bathroom Added

    newbathroom

    Adding a new bathroom will increase the cost of your extension. It will add between £2,000 – £6,000 to your final price.

    Adding a Toilet

    Adding a toilet with a single basin is a cheap way to increase the number of bathrooms in your home. The average cost for a basic bathroom is £100 - £200.

    Adding a Utility room

    Utility rooms are very hand in a home with many occupants. To add one into your extension costs on average £3,500 - £7,000 this includes the costs for the extra plumbing, a sink and the appliances.

    Planning Permission

    If you need to apply for planning permission, you need to include £206 to your budget for the application.

    Building Regulations

    The costs for building regulations will vary depending on your local council. You will need to pay to submit the paperwork and for site inspections. The paperwork costs are usually around £100. The costs for site visits usually come out at £200 - £400.

    Architect Fees

    An architect is usually not necessary. However, despite there being a cost for one, most homeowners who use an architect find that their final costs are lower. This Is because there are fewer changes made during the process. A full set of plans also reduced the opportunities for miscommunication. An architect will usually charge 7 – 15% of the cost of the work. If you simply require planning drawing this will cost £2,500 - £3,000.

    Structural Engineer

    To be structurally sound, it may be necessary to have a steel beam embedded into the wall. To calculate the size of the beam, you will need a structural engineer. They will charge you based on the complexity of the work you need completing. You can expect to pay £400 - £4,000.

    Cost Factors of Building a House Extension

    Building an extension is a big project. There are a lot of different factors that can influence how much your extension will cost.

    Type of Extension

    The type of extension you chose impacts the cost of the extension because it decides how big the job will be. It is the combination of a few other factors. Such as if you are having a kitchen and how much floor space you will be creating.

    Size of Extension

    The more floor space that will be created when you build your extension, the higher the costs will be. However, it is important to be aware that the cost per square meter drops, the more floors you have. So, to get the same floor space, it is more cost-effective to get a double storey extension or even a double storey extension with a loft space conversion.

    loftextension

    Quality of Extension

    The quality of the finish will have a huge impact on your final costs. Your cheapest option is to go with a basic finish. This means only getting the bare essentials, nothing fancy. A mid-range finish would include a few bespoke items or high-end finishes. If you decide to push the boat out and get everything top of the line and ultra-modern, then you can end up paying 2 to 3 time the total cost of a basic finish.

    Location of Property

    If you live in the London area, you will find that you are likely going to be paying a premium. You may also find your costs are higher if you live in a remote or hard to access location.

    What's Involved in Building a House Extension?

    Regardless of the type of extension, you will be getting there is an order in which the work will be completed. The size of the job often only changes how long each step will take.

    buildingextensions1

    Planning

    Possibly the most important stage is planning your project. This may involve getting an architect to make a drawing. If you need planning permission, you need to apply for it in good time before you expect to begin work.

    Once all the plans have been approved, and the contractor lined up, it is time to prepare the site. This may involve clearing the space for the extension. Materials for the building work will be delivered to the site in preparation for the work. A skip may also be placed on-site during this time

    Groundworks

    The foundations will be dug. And reinforcements will be installed. Any pipework and drainage will be laid or moved as needed. Then the concrete footing will be poured and levelled. There will be at least one building control visit, possibly two during this process.

    Superstructure

    This is all about making sure that the structure will be sound and resistant to damp. The brickwork will be completed up to the level of the damp proof course. Concrete lintels will be installed as needed. The builders will fit the insulation at this point as well. The flooring will then be poured. There will be another building control inspection during this stage of work.

    External Walls

    The external block and brickwork will be completed next. This includes tying the new walls to the old ones. The lintels and frames for the doors and windows will be fitted as the brickwork goes up. The cavity wall insulation will also be fitted before the walls are finished.

    Internal Walls

    All of the internal walls and divisions will be built next.

    Roof structure

    The carpenters will build the structure to support the roof. If there are to be any roof windows or dormers, these will be framed during this process.

    Roof Covering

    The coverings for the roof are installed. The battens and membrane go on first. The roof tile is laid next. Once the main tiles are on the roof, the valley and ridge tiles, along with the flashing, are fitted. The fascias, soffits and verges are completed as the last step.

    Windows and Doors

    Any external rendering will be completed at the same time as the windows and doors are fitted. Guttering and drainpipes will also be completed during this time.

    First Fix

    Once the extension is weatherproof, the first fix will happen. This is the carpentry, plumbing and electrics that underpins the extension.

    Breaking Through

    The dirtiest part of the project is next. The wall between the extension and the rest of the house will come down. If any steel girders need to be installed, this is when they will go in. In this case, there will be another building control inspection.

    Plastering

    plastering

    The internal insulation will go in. Then the plasterboard will go up. The walls will then be skimmed ready for decorating.

    Second Fix

    The second fix of plumbing and electrics will go in. This means that the sockets and switches go in, as well as the lights. Any taps and plumbing connections will also be completed. Flooring will be laid. Once this is done, any kitchen work will be fitted. There will usually be a final building control inspection during or after this stage in the project.

    Snagging

    Once the work is done, you will need to spend some time in the extension to find any problems that may need to be addressed. This might be leaks, ill hanging doors or heating problems.

    Can I Build a House Extension Myself?

    Even for the most experienced DIYer, a house extension is not a DIY job. There are aspects of the job that should only be undertaken by qualified professionals. One example of this is the electrics. All electrics in the extension must meet building regulations. This means that the work should be carried out by a Part P qualified electrician.

    If you want to keep your budget for the project low by completing some of the work, yourself there are parts of the job that can be DIYed. Which tasks you choose to complete will depend on your confidence and skill level. The most DIY accessible jobs are finishing jobs. Things like fitting tiles, laying flooring, decorating. Installing a kitchen is doable but is often a more than one-person job.

    If you intend to complete some parts of the work yourself, you should make sure to speak to your lead contractor about your plans. You will need to liaise with them about when you will be completing tasks. This will allow them to plan the tradespeople around your timings. It can be a good idea to speak to lead contractors about your plans to complete some of the work yourself while you are getting a quote. Some will be more open to the idea than others.

    Types of House Extension

    sideextension

    Once you've decided that you want to get an extension built on your house, the next step is to decide, what sort of extension you want.

    Lean-To Extension Cost (Rear or Side)

    A lean-to extension typically adds a single room to the back of the building. The roof is most often pitched, which is the reason for the name. A lean-to extension is a good choice if you only require a small extension. The cost of an extension like this is usually between £25,000 - £40,000.

    Pros

    ✔ Offers flexibility

    ✔ Easily add a single extra room

    Cons

    ✖ Size is limited by garden space

    Side Return Extension Cost

    Some homes have alleyways that run down one side of them. You often find these in Victorian terraces. Most homeowners use them to store their bins. In this extension, the alleyway is used to extend the ground floor of the home. Because this is a small job, the cost of extension is comparatively low. The average cost is £15,000 - £25,000.

    Pros

    ✔ Quick and cheap option

    ✔ No garden space sacrificed

    Cons

    ✖ Only adds a limited amount of extra space

    ✖ Only an option for some homes

    Kitchen Extension Extension Cost

    One of the most common uses for an extension in the kitchen. This can involve extending and remodelling the existing kitchen. The cost of a kitchen remodel varies largely based on the quality of the fittings and appliances chosen for the kitchen. The costs range between £25,000 - £100,000.

    Pros

    ✔ Good opportunity to create an open plan kitchen and dining room

    ✔ Can rearrange the kitchen to suit your needs

    Cons

    ✖ Can be the most expensive type of extension

    Wrap Around Extension Cost

    A wrap around extension is when you extend to both the rear and the side of your home at the same time. This creates a lot of extra space in your home. It is ideal for creating large open plan living spaces. The average extension cost is £40,000 - £100,000.

    wraparound

    Pros

    ✔ Creates lots of space

    ✔ Flexibility of design

    Cons

    ✖ Expensive

    Single-Storey Extension Cost

    Single storey extensions are extensions that only expand your ground floor space. Their roofs can be completely separate from the main roof of your home. The cost of a single storey extension is £15,000 - £100,000 depending on which type of extension you choose.

    Pros

    ✔ More roofing options

    ✔ Quicker to build

    Cons

    ✖ Higher cost per meter square

    Double-Storey Extension Cost

    Lean-to and wrap around extensions can be built as two storey extensions. If you want to go even further, you can also get the loft spaces also made into liveable spaces. The average cost of a double storey extension is £40,000 - £50,000 for a lean-to extension and £60,000 - £150,000 for a wrap around.

    Pros

    ✔ Lowest cost per m2

    ✔ Creates more space for the amount of garden sacrificed

    Cons

    ✖ Can be very expensive

    Building Regulations and Planning Permission for a House Extension

    Building regulations will apply to any substantial work you have done on your home. Planning permission is not always needed. Permitted development allows you to do a lot of work on your home without applying for permission

    Building Regulations

    Building regulations aim to ensure that all homes are built up to a suitable standard. This means that when you get an extension done, building regulations will be applied to the whole of your home. Not just the new extension. You should be aware of this as it can add a lot of costs. Small changes can be needed, like the addition of fire doors throughout your home. However, much larger renovations can be needed like the rewiring of the whole house.

    To get the work approved as meeting building regulations, you need to complete some paperwork and then pass inspections. The whole process usually costs between £50 - £100. As the homeowner, you are responsible for ensuring that the work is completed following building regulations. In most cases, your lead contractor will ensure it is done. You should make sure it is clear who is taking responsibility for doing this at an early stage.

    Do You Need Planning Permission?

    Many extensions do not need planning permission. The following are the limits of what you can have done without getting planning permission.

    • Single storey extension can extend up to 4m on a detached property and 3m on any other type of property
    • The maximum height is 4m
    • The new building work should be completed using similar materials to the rest of the home
    • A maximum of half the garden space can be used
    • A side extension can be no more than half the width of the original home

    Anything beyond these limits may be subject to planning permission. You can use the government’s planning portal to check. Another option is to speak to your local council. Most have a planning department. These offer consultations to advise you about the need for planning permission. There is usually a cost of around £50 - £150.

    If you live in a national park or a conservation area, then you should be aware that these limits may be much smaller.

    Applying for Planning Permission

    Applications for planning permission can be made either online through the planning portal or directly with your local council. If you are unsure about completing the application yourself, then you could speak to your architect or designer. Many of them are familiar with the process and can submit applications on your behalf.

    Every application costs £206. The documents required vary between local councils so you will need to check what yours asks for. Many councils provide a support service for applications. For a fee, they can help you to file the necessary paperwork.

    After the application is submitted there is an average of an eight-week wait. This time allows anyone to file a complaint about the planned work. It's best to speak to your neighbours in advance of this. It reduced the likelihood of them filling a grievance.

    You will either be granted permission or informed of the reason for rejection. If your application is rejected, you can make changes to your plans and reapply.

    Benefits of a House Extension

    There are many reasons why people invest in an extension. Some of the most common ones are listed below.

    diyextensions

    No Need to Move Home

    As your family grows it your existing home can begin to feel crowded. To make your home liveable, you might face the possibility of moving home. However, if you are attached to your home, and the location, an alternative is to extend the property instead. Adding an extension can allow you so stay in a property that you love.

    More Room

    The most obvious benefit of an extension is the added space. With an extension, space is added to the floors of your home where you already spend most of your time. By extending the existing living areas, you are not creating a tall and thin home, which can be undesirable for some.

    Update House

    Adding an extension is a big opportunity to change the layout of your home. It can allow you to create an open living area. Many extensions involve an update to the kitchen. This can make your home feel like new.

    Increase House Value

    Adding an extension to your home will add to the value of it. The more space you add, the more value you will add. Typically, you can expect to increase your home value by around £2,000 per m2. In London where space is at a premium, an extension can add as much as £4,000 per m2.

    Where Can I Put a House Extension?

    You can put an extension on your home onto any side where there is space. The back of the house is the most common choice. This is because most homes have space to the rear of the property, and it is easy to create a feeling of flow into your home. Extension to the side of a property is possible as long as you are not joined to another home. A wraparound extension is a combination of both a side and rear extension.

    massiveextensions

    Front extensions are possible but are quite rare. Most homes do not have large amounts of space at the front and adding an extension to the front can be complicated. It changes the look of the building, so getting planning permission can be difficult or impossible depending on your location.

    Alternatives to a House Extension

    If you are looking to add space to your home or increase the property value, there are other options.

    Conservatory Cost

    Traditionally conservatories are a mix of brickwork and glass. The glass is panes are similar in size to large windows, and the brickwork usually rises about 1m in height. The average cost of a conservatory is £15,000.

    Pros

    ✔ Quick and Easy to Build

    ✔ Cost-Effective

    Cons

    ✖ Not considered a liveable space, so do not add as much value as an extension

    ✖ Can be hot in summer and cold in winter

    Summer House Cost

    A summer house is a separate building in your garden. The price varies depending on the quality of the construction. To have a space that could act as a bedroom or sitting room all year round costs on average £12,000.

    Pros

    ✔ Can add as much as 5% to the value of your home

    ✔ Less disruption to home life

    Cons

    ✖ Can be expensive to make a liveable space

    ✖ Considered a luxury addition

    Orangery Cost

    Orangeries are the forebears of conservatories. They are made with more brickwork than a conservatory. The roof to an orangery is usually flat with a glass lantern window. The average cost of an Orangery is £22,000.

    Pros

    ✔ Offers more light than an extension

    ✔ Provides more space than a conservatory

    ✖ Cons

    Flat roofs can be difficult to maintain

    Can be more expensive per square meter than other options.

    Glass Room Cost

    Glass rooms are made almost entirely from glass. It is like a conservatory; only the glass continues all the way to the ground; there is no brickwork. The large glass panels create a modern finish. The costs for this are £15,000 - £70,000.

    glasshouse

    Pros

    ✔ Clear views over your garden and surrounding area

    ✔ Bespoke systems

    Cons

    ✖ Expensive to buy and install the glass

    ✖ Expensive to heat

    Prefab extension Cost

    It is possible to create your extension off-site, and then just install it by using cranes to lift the pieces into place. The average cost for this is £2,000 per m2.

    Pros

    ✔ Quick and easy installation

    ✔ Minimal disruption for you and your neighbours

    Cons

    ✖ Need access space for a large crane

    ✖ Limited options

    Loft Conversion Cost

    A loft conversion is often the most cost-effective way to add space to your home. The amount of space you gain will depend on your existing loft and the type of conversion you choose. The average cost is £40,000. A very basic loft conversion can cost as little as £15,000.

    Pros

    ✔ Cheapest cost per m2 gained

    ✔ No loss of outdoor space

    Cons

    ✖ Available space depends on the style of roof

    ✖ Can be expensive to make more awkward spaces useable

    Cost of Removing a House Extension

    If there is already an extension on your home, but you are not happy with it then you have two options. You can either replace the existing extension, or you can remove it. Removing an extension can be a big job, depending on the type and how it is integrated into your home. If the roof of the extension is joined to the main house, then you will need the services of a roofer to fix the main roof when you are done.

    To remove an extension will cost between £3,000 - £5,000 for a single storey extension. For a double storey extension, the costs can be as much as £10,000. This will cover the costs of bringing down the old extension and removing the rubble. You will then need to consider what you want to do with the open wall.

    Hiring House Extension Contractors

    When you are hiring contractors to build your home extension, you have a choice to make. You can choose one contractor to be your project manager, in which case they will be responsible for finding and vetting the rest of the workers on site. The other option is to act as the project manager yourself. In which case, you will need to consider the credentials of all the workers you hire. Even though you pay a contractor more to run the project, it can work out as a cheaper option. Especially if you don't have experience of running a building project.

    Here are some of the key things to look for in a contractor who will also be acting as your project manager.

    • Expect to see examples of previously completed work.
    • They should be happy to give you details of previous clients so you can speak to them yourself.
    • They should be able to give you a breakdown of the costs. Do not expect this on the day. To give an accurate quote will take time.
    • A good indicator is that they take notes on the project as you are talking, or just after.
    • Check that they will take responsibility for arranging the building control visits.
    • Membership in a traded association is not a guarantee of quality, but it is a good indicator that they take pride in their work.

    FAQs

    Do I need an architect for a house extension?
    In most cases, an architect is not necessary. Most experienced builders are happy to work without one. However, for a large project, it may be necessary. It can also be advisable for any extension project. Having an architect draw up plans can help to keep costs down and makes sure that there is a clearly agreed on the final product.
    How much value does an extension add to my house?
    The amount of value added by an extension will depend on a combination of where you live and how much space you added to your home. As a rough guide, extra space can add roughly £2000 per m2 to the value of your home. In London, this can be higher, at nearer £4,000 per m2. In most cases, the value-added will be greater than the extension costs per square meter.
    Can I get a bungalow extension?
    It is possible to put an extension onto a bungalow. It is no different than putting a single storey extension onto any home.
    How close to the property boundary can I build an extension?
    An extension can go right up to the edge of your property if it is a single storey. If this is your plan, it is a good idea to speak to your neighbour in advance. For a double storey extension, you must maintain the sightlines for your neighbour’s property.
    How long does it take to get planning permission for an extension?
    Planning permission takes, on average, eight weeks to be approved. When you are speaking to builders to get quotes, you should keep this time frame in mind.

    Sources

    https://www.which.co.uk/reviews/conservatories/article/conservatories-and-orangeries/conservatory-prices
    https://www.planningportal.co.uk/info/200130/common_projects/17/extensions
    https://www.homebuilding.co.uk/extension-beginners-guide/
    https://www.self-build.co.uk/prefabricated-extensions/
    https://www.realhomes.com/advice/qa-update-or-replace-a-dated-extension
    https://www.simplyextend.co.uk/planning/types-of-extension/
    https://www.leaders.co.uk/advice/how-much-value-does-summerhouse-or-garden-building-add

    Last updated by MyJobQuote on 23rd September 2020.

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