Extension costs in the West Midlands (2026): real local prices
Quick answerA 20m² single storey rear extension in the West Midlands typically costs £54,000 to £62,000 including VAT. These are our tightest figures, because they come straight from completed jobs around Dudley, Stourbridge, Wolverhampton and Bridgnorth. Solihull and Sutton Coldfield price higher, Sandwell and Walsall lower.
Typical prices in the West Midlands
the West Midlands the West Midlands, West Midlandsindex 1.00- Single storey rear extension20 m² (5m × 4m)£54,000 to £62,000£2,870/m²
- Kitchen extension with bifolds24 m² (6m × 4m), mid spec£71,500 to £82,500£3,180/m²
- Double storey rear extension40 m² over two floors£86,500 to £99,500£2,310/m²
- Dormer loft conversion2 bedrooms + en-suite£48,500 to £56,500
- Velux loft conversion2 rooms£34,500 to £40,500
- Garage conversion15 m² single garage£20,000 to £23,000£1,410/m²
All prices include 20% VAT, professional fees and statutory planning fees. Kitchen extension includes a mid-range kitchen, bifolds and a roof lantern.
Price my exact projectBuilding in the West Midlands
The West Midlands is where Quoteio's cost data comes from. Our base prices are built from completed extensions, loft conversions and garage conversions in the Black Country, Birmingham and Shropshire, so ranges here are tighter than anywhere else. Within the region we price district by district: a kitchen extension in Knowle or Four Oaks costs more than the same job in Tipton or Smethwick, and our figures reflect that. The housing mix of Victorian terraces, interwar semis and post-war estates suits almost every type of extension.
What moves the price in the West Midlands
Postcode-level differences
Labour and materials cost much the same across the conurbation, but builders price to the market. Solihull, Sutton Coldfield, Harborne and Edgbaston carry a premium, while much of Sandwell, Walsall and Wolverhampton sits below the regional average. We apply that difference district by district.
Black Country ground
Parts of the Black Country have a history of mining and industry, including limestone and coal workings. A ground report is worth having before you finalise foundations, because extra depth or concrete can change the groundwork bill noticeably on an otherwise standard job.
Interwar semis
The region has huge numbers of 1930s semi-detached houses. They suit side extensions, garage conversions and hip to gable loft conversions well, which is why those projects come up so often in our data and why we can price them closely.
Planning and building control in the West Midlands
English rules apply across the region. Many single storey rear extensions are permitted development within the 3m or 4m limits, and the prior approval route can allow up to 6m or 8m. Lofts are often permitted development within volume limits. Conservation areas in places such as Moseley, Edgbaston and Bridgnorth, and green belt around the conurbation, can restrict these rights. Building Regulations approval is always needed.
Prices across the West Midlands
A 20m² single storey rear extension and a two-bedroom dormer loft with an en-suite, priced for each example postcode. All figures include VAT and fees.
| Postcode | Area | Single storey, 20m² | Dormer loft | Index |
|---|---|---|---|---|
| B15 | Edgbaston | £57,000 to £65,500 | £51,500 to £60,000 | 1.06 |
| DY8 | Stourbridge | £55,000 to £63,000 | £49,500 to £58,000 | 1.02 |
| WV6 | Tettenhall | £55,500 to £64,000 | £50,000 to £58,500 | 1.03 |
Cost index for every postcode area in the West Midlands
Our index against the West Midlands base of 1.00. Higher means dearer. Enter a full postcode in the checker for district-level detail where we have it.
| Area | Main town | Index |
|---|---|---|
| B | Birmingham | 1.00 |
| CV | Coventry | 1.01 |
| DY | Dudley | 1.00 |
| HR | Hereford | 0.99 |
| ST | Stoke-on-Trent | 0.95 |
| SY | Shrewsbury | 1.00 |
| TF | Telford | 0.97 |
| WR | Worcester | 1.02 |
| WS | Walsall | 0.99 |
| WV | Wolverhampton | 1.00 |
the West Midlands: common questions
How much does an extension cost in the West Midlands?
A 20m² single storey rear extension typically costs £54,000 to £62,000 including VAT, about £2,870 per square metre. A 24m² kitchen extension with bifolds and a lantern at mid spec is around £71,500 to £82,500.
Why are Quoteio's West Midlands prices more precise?
Because our cost data comes from completed jobs in this region, mainly around Dudley, Stourbridge, Wolverhampton and Bridgnorth. Elsewhere we adjust that data with a regional cost index, which carries more uncertainty, so the ranges are wider.
How much is a loft conversion in Birmingham or the Black Country?
A dormer loft conversion with two bedrooms and an en-suite typically costs £48,500 to £56,500 including VAT across the West Midlands. A two-room Velux conversion is usually around £34,500 to £40,500.
Which parts of the West Midlands are most expensive to extend?
Solihull, Knowle and Dorridge, Four Oaks, Harborne and Edgbaston are consistently the dearest, because builders price to the local market. Sandwell, Tipton, Walsall and parts of Wolverhampton tend to be the cheapest for the same work.
Other regions
- RegionLondon£71,000 to £88,500
- Regionthe South East£59,500 to £71,000
- Regionthe East of England£57,000 to £68,000
- Regionthe South West£55,500 to £66,000
- Regionthe East Midlands£52,000 to £62,500
- Regionthe North West£52,000 to £62,500
- RegionYorkshire and the Humber£50,500 to £60,500
- Regionthe North East£49,500 to £59,500
- RegionWales£50,500 to £60,500
- RegionScotland£52,500 to £63,000
- RegionNorthern Ireland£47,500 to £56,500