How Much Does Decking Cost in the UK?
Decking is priced per square metre including the frame, boards and fixings. Composite costs more than timber upfront but needs almost no maintenance.
Typical 20m² deck, supplied and fitted. Timber at the low end, composite at the top.
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Cost per square metre (fitted)
Cost by size (fitted)
What affects the price
- •Decking material — composite costs more upfront but avoids the ongoing staining and sealing that timber needs.
- •Height and substructure — a raised deck needs more framing, posts and often balustrades.
- •Groundworks and levelling on uneven or sloping ground.
- •Balustrades, steps, lighting and built-in seating.
- •Removing an old deck or clearing the area first.
Regional price variation
Labour is the biggest regional swing. London and the South East typically run 20–30% above the national average, while the North of England, Scotland and Wales tend to sit 5–15% below it. Material prices are fairly consistent nationwide — it is day rates that move the total. The ranges on this page assume South of England pricing unless stated.
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Frequently asked questions
How much does decking cost in the UK?
Decking typically costs £100–£300 per square metre fitted, so a 20m² deck is £2,000–£6,000. Softwood timber is cheapest, composite decking the most expensive but lowest-maintenance.
Is composite decking worth the extra cost?
Composite decking costs more upfront but needs no staining, sealing or sanding and does not rot or splinter, so it often works out cheaper over its 20–25 year life than repeatedly maintaining timber.
Do I need planning permission for decking?
Decking usually falls under permitted development if it is no more than 30cm above ground and, with other garden structures, covers no more than 50% of the garden. Raised decking or larger projects may need planning permission.