Composite & timber decking in Cranfield
Composite and timber decks for Cranfield's estates and older core, with drainage beneath the frame planned for heavy, poorly drained clay.
In Cranfield, composite decking typically costs £200–£250 per m² supplied and fitted and softwood timber £110–£140 per m²; a 15–20m² composite deck is usually £3,000–£5,000. The ground is the main concern: Cranfield sits on heavy chalky boulder clay that drains poorly, and surface water affected around 80 properties in June 2016, so water under the deck has to be managed.
- Composite, fitted
- £200–£250 per m²
- Planning
- Not needed under 30cm high
- Ground
- Heavy, poorly drained boulder clay
- Guarantee
- 5 years, in writing
Guide prices from 2026 online price guides, at the higher end; your fixed price comes in writing after the free design visit. Planning rules checked October 2026.
Composite & timber decking in Cranfield
Cranfield is a large village best known for its university and airfield. It grew from about 4,900 people in 2001 to around 6,000 by 2018, so a large share of its homes are on newer estates, alongside the older core on High Street and Court Road. Estate gardens are often level, lawned and fenced, and many have a small slab patio by the back door. A deck can replace or extend that patio with a larger, flat seating area that stays usable when the lawn around it is wet.
On a Cranfield estate plot, the deck itself is straightforward and most of the thought goes into the drainage beneath it. The guide figures are £110–£140 per m² for softwood timber supplied and fitted and £200–£250 per m² for composite, which puts a 15–20m² composite deck replacing a small patio usually in the £3,000–£5,000 range. Few Cranfield gardens need raised decks, but where one does, balustrades and steps cost more. We visit for free, look at the ground and drainage, and give you a fixed price in writing.
What makes Cranfield different
Cranfield sits on a plateau of heavy chalky boulder clay over Oxford Clay. It is poorly drained, and soakaways often fail. Central Bedfordshire Council's flood investigation found around 80 properties affected by surface water in June 2016, so drainage needs planning from the start. Under a deck, that means not simply covering wet clay: we lay a membrane and drainage to move water away rather than leaving it sitting beneath the joists. Cranfield has no conservation area and no Article 4 direction.
A typical Cranfield deck is built at the back of a 2000s or 2010s estate house, often replacing a small slab patio. It usually involves lifting turf or slabs, setting pads or posts on firm clay, building a braced sub-frame, laying a weed membrane with drainage beneath that leads water away, and finishing with composite or softwood boards.
Sources: Central Bedfordshire flood investigation, June 2016.
Permissions and checks in Cranfield
- Step 1Decking in a rear garden is normally permitted development if no part of it is more than 30cm above the ground and, with other outbuildings and platforms, it covers no more than half the garden. A raised deck over 30cm needs planning permission, and a listed house needs consent. Planning Portal: decking
- Step 2Trees in a conservation area need six weeks’ written notice before any work, and trees with a Tree Preservation Order need consent — both are free. Central Bedfordshire Council: trees in conservation areas
- Step 3We check the ground and the planning position at the free design visit and give you one fixed written price.
Rules checked October 2026.
What you get in Cranfield
- Drainage under the frame designed for heavy clay where soakaways often fail
- Estate planning permission checked for removed permitted development
- Run-off kept away from the house on a surface-water risk plot
- Composite boards that will not rot, splinter or need staining, or pressure-treated softwood
- Frame built to the board maker's joist spacing, so boards do not bounce or bow
- Picture-frame edges, hidden fixings and LED step lights where you want them
The specification
- Ground levelled, weed membrane and drainage gravel laid
- Posts or pads on firm ground, set in concrete
- Treated softwood or aluminium sub-frame, braced and level
- Boards fixed to the manufacturer's spacing and fixings
- Edges, fascias, steps and lighting finished
- Five year written guarantee, transferable if you sell
“Connor and the team recently completed our resin driveway in Bletchley. From going through the design with us and even making pictures so we could see how it looked, to the install and the aftercare, it has all been perfect. Thanks again.”
Resin driveway — Bletchley
“Milton Keynes Driveways & Landscaping have just finished our full garden makeover in Milton Keynes. We had a porcelain patio, composite decking and raised sleeper beds. They arrived on time, kept my home clean and the garden looks terrific. They are coming back to do our block paved driveway soon.”
Full garden makeover — Milton Keynes
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Composite & timber decking in Cranfield: questions
How much is decking in Cranfield?
Is planning permission needed for a deck in Cranfield?
Our lawn stays wet for days after rain. Can we still have a deck?
Should we choose composite or timber on wet ground?
Composite & timber decking nearby
What composite & timber decking cost
Our composite & timber decking cost guide breaks the price down: what is included, what changes it and what to check in any quote.
Free design visits across Cranfield
We measure up, check the ground, talk it through and send a written proposal with the build-up, the programme and one whole price. No pressure and no follow-up sales calls.