Quick Answer
Decking costs in the UK range from £80 to £200 per square metre installed. A typical 15m² deck costs £1,200 to £3,000 for DIY or £2,000 to £5,000 professionally installed.Timber Decking CostsSoftwood: £80-120 per m² installed. The most affordable option. Lifespan 10-15 y...
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- Last Updated:
- 5 Jul 2026
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- Cost Guides
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- 1 min read
Decking costs in the UK range from £80 to £200 per square metre installed. A typical 15m² deck costs £1,200 to £3,000 for DIY or £2,000 to £5,000 professionally installed.
Timber Decking Costs
Softwood: £80-120 per m² installed. The most affordable option. Lifespan 10-15 years with annual treatment. Hardwood: £150-250 per m² installed. Beautiful and lasts 25-40 years.
Composite Decking Costs
Composite boards cost £120-200 per m² installed. No annual treatment needed, slip-resistant, and lifespan of 25-30 years.
Hidden Costs
Foundations add £300-800. Balustrades cost £50-150 per metre. Steps add £200-500 per flight. Lighting costs £200-400.
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I noticed you've mentioned composite decking prices are £120-£200/m² installed. Could you clarify if that's inclusive of any additional costs like delivery?
Remember to consider expansion gaps between boards to accommodate temperature fluctuations – around 3-5mm should suffice for timber, but composite may require more.
Just had my first composite decking installed last week. It's looking fantastic! Wonder how soon I can start hosting garden parties? 🍹🌳
I'd add that for timber decking, consider pressure-treated softwood for longevity. It's typically £10-20 more per m² but extends lifespan to 20+ years.
Just wondering, would you recommend softwood for a small, temporary deck in my mum's garden? She's on a tight budget but doesn't want it to look too cheap!
I notice you've quoted ranges for decking costs. Could you perhaps clarify how these brackets are arrived at? E.g., what's the most expensive option under £200/m²?
I'm planning my new deck in Bristol. Based on these prices, I might splash out on some composite for low-maintenance living!
I've just had composite decking installed in my back garden in Leeds. Cost me about £2,500 including foundations and lighting, but it's absolutely stunning - well worth it!