Deck Building & Repair in London

Deck cost is driven by area, height off the ground, and material. Ground-level softwood decks are the cheapest; elevated decks need engineered footings and balustrades, and composite or hardwood boards can double the board cost. Most quotes are priced per square metre or square foot, with stairs, balustrades and lighting as line items.

Timber is cheaper to install but needs sanding, staining or oiling every 1-3 years. Composite costs 50-100% more upfront but only needs washing. Over 10-15 years the totals often converge, so the decision usually comes down to upfront budget and how much maintenance you will actually do.

A simple ground-level deck takes 2-4 days. An elevated deck with footings, stairs and balustrades typically takes 1-2 weeks, plus any permit or inspection lead time before work can start.

Usually yes once the deck is raised above a threshold height or attached to the house — the exact trigger varies by jurisdiction. Ground-hugging platforms are often exempt. A good deck builder in London will know the local threshold and handle the application; be wary of anyone who says permits never apply.

If the frame (joists, bearers, posts) is sound, boards and balustrades can be replaced individually and the structure re-stained for a fraction of a rebuild. If posts are rotting at the base or the ledger connection to the house is corroded, replacement is usually safer and not much more expensive than piecemeal repair.

Footings must reach below frost depth (often 1.2m+) to avoid heave, and the build season concentrates in May-October — book in late winter for spring slots. Pressure-treated lumber prices also swing seasonally, so off-season quotes can be cheaper.