How much will new decking cost? Find out what you can expect to pay for decking and essential extras

If you’re building a new deck, you’ll need to know what decking costs you will need to splash out on to keep within budget. The prices can vary greatly depending on factors such as size, materials and whether you’re going to DIY it.

Wood decking ideas are typically less than composite decking, but it’s not that simple. What wood you choose will make a big difference to the cost. Softwood is the budget -friendly option, but it's unlikely to last as long as hardwood or composite. So there are choices to be made and this guide is here to help you make the right ones.

Get the gear for a new deck

Thomas Oldham

Thomas Oldham has spent the past four years using his expertise of working in the engineering and construction industry for over a decade to develop the UK Construction Blog - a leading online platform dedicated to empowering individuals and businesses in the construction industry.

How much will new decking cost?

Decking costs will vary from project to project but as a general starting point Thomas Oldham says, “Treated softwood is the most affordable option, typically starting at £1,350 for a small deck.” He adds, “While it’s easy to find and cost-effective, it does require regular maintenance.” And it's typically not as long lasting as hardwood or composite.

Oldham continues, “Hardwood, such as oak or teak, offers a more premium look and is more durable, with prices starting at £1,950 for a small deck.” He adds,”If you're looking for something that’s durable with minimal upkeep, composite decking is the way to go. While it comes with a higher price tag, it requires less maintenance and will last longer.”

Then you might need to consider options beyond the cost of the decking and labour as Oldham shares, "Weather-resistant screws, wood preservatives, and a weed membrane are all necessary to keep the structure in good shape." A cheap membrane will cost around £25 (depending on size). For a better quality membrane on a larger deck expect to pay at least double or triple this.

To prolong the lifespan of the deck and change its appearance there is the option to stain or paint. Oldham says, "Using oil-based wood preservatives like Ronseal or Barrettine will help protect the wood from rot. A 5 litre tin of Ronseal Ultimate Decking Paint (available from Amazon) costs £45-50.

You might want to include some stylish decking balustrade ideas to finish your decking off. The price can vary greatly depending on what you choose – timber, metal or glass. But expect to pay a minimum of £100, but most likely more.

All the prices for the extras are just for the materials, so you will need to factor in labour costs as well if employing a professional to do the job.

How much to hire an expert to install a deck?

Building a deck is typically a one or two day job for a basic wooden deck and a pro will charge around £150-£200 a day for labour.

If you are having a larger or more intricate deck built it will take longer, maybe three or even four days, so obviously you will need to pay your pro more.

Is wood or composite cheaper for decking?

Wood decking is typically cheaper than composite decking. At the low end wood decking will cost you around £10m/2, while prices for composite decking start at around £20-30m/2. Expect to pay two, three or even four times this for high quality hardwoods and composite.

The common choice for the cheaper decking is pine, but if you want a more durable wood such as oak, cedar or redwood then you have to pay a lot more. Prices can be as much as £80/m2, but you will get a longer lasting wood that is typically used for more designer decking.

Composite decking ideas are a common alternative to timber decking and is made from a mixture of wood fibres and recycled plastic. This makes it more durable, easier to clean and requires less maintenance.

Whatever ever you choose – wood or composite – you will need to know how to clean decking to make sure that you prolong the life of your deck and keep it looking good.

Can I build a deck myself?

If you are a competent DIYer and can build a deck yourself then you will obviously save on labour costs. But you will need to get a lot more involved in the purchasing and build process. You will need to source your decking and organise delivery times, but again shop around and you could get a really good deal.

If looking to build a small wooden deck you could think about getting a budget decking kit for around £300. These include the decking boards and joists. If looking for a larger decking kit – 4.8m x 4.8m as an example – these can be found for around £1000+. But you won't get any extras.

Another cost to consider is tools. Many DIYers will already have the necessary tools to build a deck, but if you don’t you will need to purchase. One of the best mitre saws will set you back at least £100-£150. Though you could go old school and use a hand saw which cost a lot less.

FAQs

Does a deck add value to my home? 

The answer is a definite Yes. A well-built and maintained deck can add monetary value to your property, especially if large and a key feature that sells a view to prospective buyers. It is hard to gauge how much value a deck will add, but if it helps sell your property for the price you want then it's a winner.

If you learn how to install decking yourself you can save on labour costs, which indirectly means that you are adding even more value to your home.

How long does a deck take to build? 

A simple, straightforward, average-sized deck with no extras or treatments should take two days. A smaller deck can be put together in a day. But if you have a larger deck with a more complicated design, decorative balustrades and a treatment you could easily be looking at a week.

Make sure to plan ahead so you have all the tools and materials you need before you start if doing the job yourself. If using a professional to build and paint your deck you will need the best decking paints for a top finish. Discuss with your pro how much more time this will add to the overall build.

If you’re looking to invest in new decking you need to choose something that makes the most of your outside space. Check out our small decking ideas and composite decking ideas for some inspiration. Or if you simply want to keep your old decking but give it a spruce up check out painting decking guide.