How much does decking cost?
Updated 9 Aug 2026
Typical cost per average deck
£1,200 – £3,000
Garden decking in the UK typically costs £80–£160 per m² supplied and fitted for timber, or £120–£250 per m² for composite. An average 15m² deck usually comes to £1,200–£3,000 depending on materials and groundwork.
| Job | Typical cost |
|---|---|
| Softwood decking (per m², fitted) | £80 – £130 |
| Hardwood decking (per m², fitted) | £130 – £220 |
| Composite decking (per m², fitted) | £120 – £250 |
| Groundwork & levelling | £200 – £800 |
| Balustrade / handrail (per metre) | £60 – £150 |
| Annual clean & re-treat | £150 – £350 |
Prices are typical UK guide figures and vary by area, materials and job size. Post your job for real local quotes.
Timber vs composite
Softwood is cheapest upfront but needs cleaning and re-treating most years. Composite costs more to install but needs almost no maintenance and won't splinter or rot — over ten years the total cost often evens out.
If the deck gets heavy use or sits in shade where algae builds up, composite usually wins.
Don't skip the base
Most decking failures come from the frame, not the boards — poor ground preparation, inadequate joist spacing or no airflow underneath. Make sure the quote includes proper groundwork.
Frequently asked questions
Do I need planning permission for decking?+
Usually not if it's under 30cm high and covers less than half your garden. Raised decking overlooking neighbours may need permission — check with your council.
How long does decking last?+
Well-maintained softwood 10–15 years; hardwood and composite 25 years or more.
Ready to get it done?
Post your fencing & decking job free on BidMyJob and local people will bid. No fees, no commission — you pick who you like.