Flat roof extensions for homes in Willenhall
A flat roof extension in Willenhall starts with the right design and the right approval route. We take care of both, then build it with our own project management.
- Guide price in WillenhallFrom £20,000 inc VAT
- PlanningOften permitted development (3–4 m), or prior approval up to 6–8 m
- Build time10–16 weeks on site
- Postcode districtsWS10, WV1, WV11, WV12, WV13
Will the council need to approve it?
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
Homes in conservation areas, national parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Building over or within 3 m of a public sewer needs the water company's consent, usually through a build-over agreement, before the foundations go in.
Applications are decided by the local planning authority (your district, borough or unitary council).
Extensions in and around Willenhall
Site visits are available across Willenhall (WS10, WV1, WV11, WV12, WV13, WV14). Nearby, we also take on projects in Wednesfield (1 mile), Wolverhampton (3 miles), Wednesbury (3 miles), Walsall (3 miles).
Just over the Staffordshire border, Great Wyrley is about 6 miles away. Across the West Midlands, brick-built semis with long gardens are common, so single-storey and two-storey rear extensions are popular choices.
What we take care of
- Parapets or edge trims and flashings to the house
- Warm-roof design with insulation above the deck
- Falls and outlets designed to drain properly
- Lanterns or rooflights with upstands
What should I budget for a flat roof extension in Willenhall?
Labour and material costs vary across the UK, so for Willenhall we use our West Midlands factor (×0.97). The ranges include VAT and exclude design, structural and council fees.
Typical rates in Willenhall: £1,700 to £3,250 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 3 m × 4 m 12 m² | £20,000 – £24,000 | £23,500 – £30,500 | £30,000 – £39,000 |
| 4 m × 5 m 20 m² | £33,500 – £40,000 | £39,500 – £50,500 | £50,000 – £65,000 |
| 5 m × 6 m 30 m² | £50,500 – £60,000 | £59,500 – £76,000 | £75,500 – £97,500 |
Want a range for your exact size? The guide-price tool takes about a minute.
Our process, step by step
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
We visit your Willenhall home, measure up, talk through what you want and check the planning position.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Your questions about a flat roof extension in Willenhall
How long does a flat roof extension take to build in Willenhall?
On site, typically 10 to 16 weeks once approvals are in place. Before that, allow 4–12 weeks design and approvals.
Do you cover all of Willenhall?
Yes. We cover Willenhall and the surrounding parts of West Midlands. Site visits are free and there is no obligation.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Willenhall, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Can I walk on a flat roof extension?
Only for maintenance unless it is designed as a terrace. A roof terrace or balcony needs planning permission and a different structure.
Are flat roof extensions cheaper?
Usually slightly, because there is less roof structure and no tiles. Our guide range is about £1,700 to £3,250 per m² including VAT.
Book a free site visit in Willenhall
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.