Extension cost in Walsall (2026): local prices by postcode
Quick answerA 20m² single storey rear extension in Walsall typically costs £53,500 to £61,500 including VAT. Walsall is one of the more affordable parts of the West Midlands to extend. Aldridge and Park Hall price higher than Bloxwich, Wednesbury and the town centre.
Typical prices in Walsall
Park Hall WS5, West Midlandsindex 0.99- Single storey rear extension20 m² (5m × 4m)£53,500 to £61,500£2,840/m²
- Kitchen extension with bifolds24 m² (6m × 4m), mid spec£71,000 to £81,500£3,150/m²
- Double storey rear extension40 m² over two floors£86,000 to £98,500£2,280/m²
- Dormer loft conversion2 bedrooms + en-suite£48,000 to £56,000
- Velux loft conversion2 rooms£34,500 to £40,500
- Garage conversion15 m² single garage£19,500 to £22,500£1,390/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 Walsall
Walsall borough runs from the terraces around the town centre and Caldmore to the suburbs of Park Hall, Streetly and Aldridge, and the estates of Bloxwich and Willenhall. Interwar and post-war semis are the most common house type, which makes single storey rear extensions, side extensions over drives and garage conversions the projects we see most. Aldridge and Streetly have larger detached homes where bigger kitchen extensions and double storey additions are popular.
What moves the price in Walsall
Affordable trades market
Walsall has a good supply of local trades and competitive builders, which keeps labour prices at the lower end of the West Midlands. The savings are clearest on standard single storey and garage conversion work.
Aldridge and Streetly homes
In WS9 and the Streetly edge of the borough, homes are larger and owners often choose mid or high spec finishes, aluminium glazing and roof lanterns. That moves typical totals up, even though day rates are similar.
Former industrial land
Parts of the borough have an industrial and mining past. If your home is near old workings or made ground, your engineer may ask for ground investigation, which can change the foundation design and cost.
Planning in Walsall
Planning and building control here are handled by Walsall Council. Many single storey rear extensions and loft conversions in England fall under permitted development, but conservation areas and Article 4 directions remove some of those rights, so check with the council before you commit to drawings.
Prices by postcode district in Walsall
A 20m² single storey rear extension and a two-bedroom dormer loft with an en-suite, priced for each district. All figures include VAT and fees.
| Postcode | Area | Single storey, 20m² | Dormer loft | Index |
|---|---|---|---|---|
| WS1 | Walsall centre | £51,000 to £58,500 | £45,500 to £53,500 | 0.94 |
| WS2 | Walsall | £51,000 to £58,500 | £45,500 to £53,500 | 0.94 |
| WS3 | Bloxwich | £51,000 to £58,500 | £45,500 to £53,500 | 0.94 |
| WS4 | Rushall | £52,500 to £60,000 | £47,000 to £55,000 | 0.97 |
| WS5 | Park Hall | £53,500 to £61,500 | £48,000 to £56,000 | 0.99 |
| WS9 | Aldridge | £54,500 to £62,500 | £49,000 to £57,500 | 1.01 |
| WS10 | Wednesbury | £51,000 to £58,500 | £45,500 to £53,500 | 0.94 |
Walsall: common questions
How much does an extension cost in Walsall?
A 20m² single storey rear extension in Walsall typically costs £53,500 to £61,500 including VAT, around £2,840 per square metre. Aldridge and Park Hall usually price higher than Bloxwich or Wednesbury.
How much is a garage conversion in Walsall?
Converting a 15m² single garage typically costs £19,500 to £22,500 including VAT. It is one of the cheapest ways to add a room, and most need Building Regulations approval but not planning permission.
Do I need planning permission in Walsall?
Many single storey rear and side extensions can be built as permitted development, within the depth and height limits. Some newer estates have conditions removing those rights, and conservation areas have tighter rules. Check with Walsall Council before you start.
How much is a double storey extension in Walsall?
A double storey rear extension with 40m² over two floors typically costs £86,000 to £98,500 including VAT. Double storey work usually needs planning permission, so allow extra time for the application.