Garage conversions in Birmingham
We turn garages into bedrooms, offices and annexes across Birmingham in the West Midlands, from Northfield and Moseley to Harborne and Hall Green. A whole extra room, without moving house.
How much does a garage conversion cost in Birmingham?
Work out yoursMost single garage conversions in Birmingham cost £14,500 to £23,000, including VAT. Half a garage can be done for less, usually from around £9,000.
The same prices across every area we cover, including VAT, checked 14 October 2026.
About 18% more floor space: what a typical single garage adds to an average Birmingham semi.
That is a whole extra room, without moving house or building out into the garden.
A typical single garage is about 15 square metres, against 85 for an average Birmingham semi, from energy certificate records.
Get a quote for your garageWill a garage conversion add value to my Birmingham home?
Usually, yes. On an average Birmingham semi, worth about £275,000, a garage bedroom can add about £23,000 to £31,000.
Birmingham has about 121,000 semi-detached homes. Three in four have three bedrooms, so a garage bedroom often makes a fourth.
| Birmingham home | Can add about |
|---|---|
| Semi-detached | £23,000 to £31,000 |
| Terraced | £19,000 to £23,000 |
| Detached | £27,000 to £28,000 |
Estimates for a signed-off extra bedroom. Sources: Nationwide's 2023 figures, UK House Price Index prices for Birmingham (July 2026), Valuation Office Agency housing counts (2025) and energy certificate records. Before any effect of losing the garage itself.
Planning in Birmingham, in short
Usually not neededConverting the inside of a garage is normally allowed without a planning application, as long as the building does not get bigger.
84.4% approved when people applyBirmingham City Council approved 84.4% of decided applications since 2016. The typical wait was 44 days, the quickest of eight West Midlands councils.
Check your estateOn some Birmingham estates, permitted development rights were removed when the houses were built. Then a conversion needs a planning application first.
Figures from council records collected by PlanIt. Withdrawn applications count as not approved.
Where Birmingham homeowners convert their garages
Outside Sutton Coldfield, Birmingham homeowners made 434 planning applications to turn a garage into part of the house between 2016 and October 2026. The busiest areas were Northfield in B31, Moseley in B13, Hall Green in B28, Handsworth Wood in B20 and Harborne in B17.
Northfield led with 38. Most conversions need no application at all, so these are only the ones that did.
Applications by postcode district (districts with three or more)
- B31 Northfield38
- B13 Moseley36
- B28 Hall Green35
- B20 Handsworth Wood32
- B17 Harborne31
- B29 Selly Oak28
- B30 Bournville24
- B42 Perry Barr20
- B32 Woodgate19
- B14 Kings Heath19
- B26 Sheldon18
- B24 Erdington17
- B15 Edgbaston16
- B34 Shard End10
- B23 Stockland Green10
- B33 Kitts Green10
- B25 Yardley8
- B11 Sparkhill8
- B38 Kings Norton6
- B45 Rednal5
- B36 Castle Bromwich5
- B16 Ladywood5
- B44 Kingstanding4
- B19 Lozells4
- B27 Acocks Green4
- B21 Handsworth4
- B10 Small Heath4
- B6 Aston3
- B12 Balsall Heath3
Each pin on the map is a postcode district, sized by its number of applications, 2016 to October 2026. Source: council records collected by PlanIt.
Birmingham garage conversions: your questions
Got a question about your Birmingham home? Ask in your enquiry and we will answer it at the visit.
Ask us a questionDo I need planning permission to convert my garage in Birmingham?
Usually not. Turning the inside of a garage into a room is normally allowed without an application. In a conservation area, or where your home's permitted development rights were removed when it was built, check with the council first. Plans that add an extension or a separate home need an application. Birmingham City Council planning.
Can I convert just half my garage?
Yes. The back becomes a room and the front keeps your storage, split by an insulated, fire-resisting wall. It is the cheapest way to gain a room in Birmingham, usually from around £9,000.
How long does a garage conversion take in Birmingham?
About two to four weeks on site for a single garage. An en-suite or opening into the house adds time. We can talk through the timing for yours at the visit.
Why are garage conversion applications refused in Birmingham?
Almost never for the conversion itself. Of Birmingham's 54 refusal letters, 39 were for other work in the same plans, most often extensions that would have taken too much light from next door's windows. 4 were certificates refused on estates where conversion rights had been removed. None refused a straightforward conversion on its own merits.
Will Birmingham let me lose the garage as parking?
Yes, in practice. Losing the garage was not the reason in any of Birmingham's 54 refusal letters. For new homes, the council's parking rules only count a garage as parking if it has adequate functional space. Its own rental garages, about 2.3 metres wide inside, even warn that some modern vehicles may not fit. Birmingham's parking rules.
Can I turn my garage into an annexe in Birmingham?
Yes, as long as it stays part of the house, sharing its entrance, garden and bills. An annexe that could be lived in on its own needs planning permission first. Birmingham refused that kind of plan 6 times in the letters we read.
Do you cover my part of Birmingham?
Yes, every part of the city: Northfield, Moseley, Hall Green, Handsworth Wood, Harborne, Selly Oak, Bournville, Kings Heath, Erdington, Edgbaston and beyond.
Do you cover Sutton Coldfield?
Yes. Sutton Coldfield is part of Birmingham City Council. 185 of the city's 619 garage conversion applications came from its five postcode districts, B72 to B76. Garage conversions in Sutton Coldfield.
Get a price for your Birmingham garage
Tell us where you are in Birmingham and what you want the garage to become.
- We visit to measure up and talk it through.
- You get a written price before any work starts.
- Our prices are on this page, so you know the range before we come.