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Garden Decking Cost Calculator
This garden decking cost calculator offers UK homeowners a simple and easy way to estimate how much it may cost to install decking in their garden. For a full cost breakdown, see our garden decking cost guide.
Decking has long been a popular choice for homeowners, offering outdoor seating, dining spaces, and level platforms on uneven ground in gardens. The cost of garden decking varies significantly depending on the size of the decking, the materials used for it, and how much preparation work is required before installation.
By entering a few key details, you can get an estimate and plan your budget before requesting quotes from local decking installers.
Decking Cost Calculator
Table of Contents
How to Use This Garden Decking Cost Calculator
This calculator is designed to provide a general estimate of what you might expect to pay for installing garden decking, and by providing some simple information, the calculator uses average UK prices to give you an idea of the likely cost, including materials and labour.
Decking Area
Firstly, enter the length and width of the area you plan to have decking installed on. These measurements will be used to calculate the total area size, which is a key factor for pricing. The larger the area, the more costly the project will be, with the requirement of more materials and longer installation time.
The size of the deck also affects how complex the build will be, as larger decks may need additional structural support, particularly if they are raised above ground level. Even approximate measurements will help produce a useful estimate and give you a better idea of the scale of the project.
Decking Material
From here, you can select the type of decking material you would like to use. The calculator has 6 options: softwood, hardwood, composite, PVC, Trex, and IPE.
Softwood decking is usually the most cost-effective option, and it's widely used in UK gardens. Hardwood offers a more premium look and feel, along with greater durability, though you'll pay more for this. For a closer look at how the two compare, see our timber decking cost guide.
Composite decking, a mix of wood fibres and plastic, is popular for its durability and low maintenance. Our composite decking cost guide covers this in more detail. PVC (or plastic) decking is designed to resist the elements, though there's a trade-off in terms of aesthetics.
Trex is a well-known composite decking brand, offering a similar balance of durability and low maintenance to generic composite boards. IPE is a premium tropical hardwood prized for its strength and longevity, and it sits at the highest price point of the materials on offer.
More luxury materials like hardwood, composite, Trex, and IPE cost more upfront, but generally offer a longer lifespan with less maintenance required. So the initial outlay may pay dividends over time.
Selecting a material in the calculator will help adjust the estimate to reflect typical costs for that material and its installation.
Decking Layout
Next, choose whether your decking will be a basic or complex layout.
Basic layouts are flat with a standard rectangular or square shape. These are quicker to build and need fewer cuts, which keeps both material waste and labour time down.
Complex layouts cover non-standard shapes, such as curves, split levels, or decking built on a slope. These take longer to plan and install, and often need additional joists, bespoke cuts, and extra structural support, all of which increase the cost.
If you're unsure which option applies to your project, a basic estimate is a reasonable starting point. You can always request a more detailed quote once you've discussed your design with a decking installer.
Handrail and Fascia Boards
The calculator also asks whether you'd like to add a handrail and fascia boards, as both affect the final price.
Handrails are typically required for raised decking above a certain height for safety, but can also be added to ground-level decks for style. Adding a handrail increases both material and labour costs, and the price will vary depending on whether you choose timber, metal, or glass.
Fascia boards are fitted around the outer edge of the deck to hide the subframe and joists, giving a neater, more finished appearance. They're a relatively small additional cost but do add to the total materials and labour required.
If you're not sure whether you'll want either of these, selecting "yes" will give you an estimate that includes them, which you can adjust once you've decided on your final design.
Current State of the Decking Area
The condition of the ground where your decking will go has a significant impact on the total cost, so the calculator asks you to choose from 4 options.
No preparation needed applies if the ground is already flat, firm, and clear, meaning your installer can move straight to building the subframe.
Minimal preparation covers ground that needs some tidying up, such as removing turf or clearing small debris, before work can begin.
Excavation and levelling applies where the ground is uneven, sloped, or soft, and needs to be dug out and levelled before the subframe can go down. This adds both time and cost to the project.
Old decking removal needed covers projects where an existing deck must be taken up and disposed of before the new one can be installed, which adds labour and waste removal costs on top of the new build.
Choosing the option that best matches your garden will give you a more accurate estimate before you request a quote.
Select Your Location
Selecting your location on the calculator is the final option, but it is an important one.
Labour costs differ significantly across the UK, with rates in London and the South East much higher than those in the North and in more rural areas. This is due to higher demand in larger cities and a correspondingly higher cost of living, which increases operating costs.
Including your location allows the calculator to provide a more accurate estimate based on typical costs in your area.
Average Garden Decking Costs in the UK
The average cost of garden decking in the UK is around £1,750, with most installations taking 1 to 2 days to complete.
Decking prices generally range from around £40 per m² installed for budget softwood, up to more than £170 per m² for premium materials like IPE. Composite and PVC options usually sit somewhere in between, offering a balance of cost and low maintenance.
These figures include both materials and labour. Your own estimate will vary based on the size of your deck, the material you choose, and the condition of the ground it's being installed on. Use the calculator above to get a more tailored figure.
Why Do We Include Labour Costs?
Labour accounts for a significant portion of the overall cost of any trade project, which is why it is included in the estimate found here.
Installing decking requires a great deal of prior planning, accurate measurements, and genuine construction skill. The subframe must be installed so it is level and strong, the decking boards must be securely fitted and aligned, and the overall structure must be strong, stable, and safe to use.
Professional installers have the experience and tools needed to complete the work efficiently and to a high standard. They can also ensure the decking is built to withstand weather conditions and regular use over time.
Including labour costs gives a more complete estimate and reflects the skill involved in building a durable and long-lasting deck.
Why Might My Quote Differ From the Calculator Estimate?
The calculator gives you a useful starting estimate, but the final quote you receive from a decking installer may be higher or lower, depending on factors the calculator can't fully account for.
- Exact ground conditions — The calculator asks for a general description of the site, but only an in-person survey can confirm exactly how much excavation, levelling, or additional support your ground will need.
- Height and structural requirements — Raised decks need a stronger subframe, more posts, and deeper foundations than ground-level decking, which the calculator doesn't account for in detail.
- Extra features not covered — Steps, built-in seating, lighting, or pergolas will all add to the final cost, but aren't included as options in the calculator.
- Specific material choice — Prices can vary within each material category — for example, premium composite brands cost more than budget composite boards, even though both fall under "composite" in the calculator.
- Access and site constraints — Difficult access, such as a narrow side passage or limited parking, can increase labour time and cost.
- Installer's day rate and demand — Local labour rates vary by installer and by how busy they are at the time of your project, even within the same region.
For these reasons, the calculator is best used as a starting point for budgeting. Our full garden decking cost guide covers these factors in more detail, and getting a written quote from a local installer is the best way to get an accurate price for your specific project.
Tips for Getting an Accurate Decking Quote
Once you have an estimate from the calculator, here's how to make sure the quotes you receive from installers are accurate and easy to compare.
- Get it in writing — Ask for an itemised quote that separates materials, labour, and any additional features like steps or a handrail, so there are no surprises later.
- Check what's included — Confirm whether ground preparation, waste removal, and a workmanship guarantee are part of the price, or if they're charged separately.
- Ask about timescales — Find out how long the job will take and what could cause delays, such as poor weather or unexpected ground conditions.
- Compare like for like — Get at least 2 to 3 quotes for the same specification — material, layout, and any extras — so you're comparing similar jobs rather than different scopes of work.
- Check insurance and experience — A reputable installer should hold public liability insurance and be able to show examples of previous decking projects.
Ready to Get a Quote?
Once you've used the garden decking cost calculator, the next step is to get quotes based on your specific project.
On MyJobQuote, you can request free quotes from local decking installers or landscapers. This allows you to compare prices, understand what's included, and choose a tradesperson that fits your budget.
Getting multiple quotes is a quick and effective way to ensure you are paying a fair price and helps you move forward with your project with confidence.
Last updated by MyJobQuote on 12th August 2026.
