Extensions over a garage in Acocks Green
Our extensions over a garage service in Acocks Green covers everything: measured survey, design, planning or permitted development checks, structural design, building control and the build itself.
Quick reference for homeowners in Acocks Green.
- Postcode districts
- B10, B11, B13, B25, B26 and B27
- County / area
- West Midlands, England
- Price region
- West Midlands
- Guide price
- £31,500–£46,000 (£1,750–£2,550 per m²)
- Approval route
- Planning permission is needed: in England, permitted development only allows single-storey extensions to the side.
- Nearest towns
- Shirley (West Midlands) (2.7 miles), Solihull (2.9 miles), Washwood Heath (3.5 miles)
- Distance to Birmingham
- about 4.1 miles
- First visit
- Free, no obligation
About an extension over a garage
An extension over a garage is a new first-floor room built on top of an existing attached garage, usually a bedroom, en-suite or study. It uses a footprint you already have, so it adds floor space without taking any garden. The garage walls and foundations often need strengthening or replacing to carry the new floor.
We cover Acocks Green (B10, B11, B13, B25, B26 and B27) and the places around it, including Shirley (West Midlands) (2.7 miles), Solihull (2.9 miles) and Washwood Heath.
What it costs in Acocks Green
Our guide for the West Midlands is £1,750–£2,550 per m² including VAT. On a project with 3 m × 6 m of new first-floor space (18 m²), that puts an extension over a garage in Acocks Green at roughly £31,500–£46,000. Steelwork for wide openings is the item most likely to move the figure; we'll know once the engineer has designed it.
| Spec | Per m² | 3 m × 6 m of new first-floor space (18 m²) |
|---|---|---|
| Essential | £1,610–£2,350 per m² | £29,000–£42,000 |
| Standard | £1,750–£2,550 per m² | £31,500–£46,000 |
| Premium | £2,100–£3,060 per m² | £38,000–£55,000 |
Planning and building regulations in Acocks Green
In England, most garages sit beside the house, so building over one makes a two-storey extension beyond a side wall, which always needs planning permission. If the garage is at the rear, the 3 m and 7 m rules for two-storey rear extensions apply, measured from the original house. A householder application costs £548 (or £575 for applications made from 8 December 2026).
Approval in England: Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.
Design points for Acocks Green homes
Matching the house
A room over a garage usually sits beside the front of the house in full view, so roof form, ridge height, windows and brick matter. Setting the front wall and ridge back slightly from the main house usually helps it look as if it belongs.
Checking the garage foundations
Garages are often built on shallow strip footings sized for a single-storey wall and a light roof. A trial hole shows their depth and condition, and the engineer decides whether they can carry two storeys or need underpinning or new foundations inside the garage.
How we'd run your project
Free site visit
We visit your home in Acocks Green, look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Drawings and permission
Our designers produce plans and elevations, then we take care of planning or permitted development checks with the council covering Acocks Green.
Fixed price in writing
With approved drawings and calculations, we give you a fixed build price and a programme you can plan around.
On site
One project lead runs the job, keeps you updated and arranges inspections at each stage until completion.
Questions about extensions over a garage in Acocks Green
Do I need planning permission for an extension over a garage in Acocks Green?
Acocks Green is in England, so England planning rules apply. Planning permission is needed: in England, permitted development only allows single-storey extensions to the side. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.
Which postcodes do you cover around Acocks Green?
We cover Acocks Green (B10, B11, B13, B25, B26 and B27) and nearby places including Shirley (West Midlands), Solihull and Washwood Heath, plus the rest of the West Midlands. The first site visit is free.
How much does an extension over a garage cost in Acocks Green?
Our guide for the West Midlands, which covers Acocks Green, is £1,750–£2,550 per m² including VAT. A typical project with 3 m × 6 m of new first-floor space (18 m²) comes to about £31,500–£46,000. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Can my garage take a room on top?
Sometimes, but it needs checking. Many garages are built on shallow footings with thin walls, designed only for a single storey. We dig a trial hole and inspect the walls, and the structural engineer decides whether to reuse them, strengthen them, underpin the footings or build new foundations inside the garage.
Do I need to convert the garage as well?
No. You can keep the garage for parking or storage and build only the room above, as long as the floor between them and any door into the house meet fire separation rules. Converting the garage at the same time is often good value, because the walls and foundations may be upgraded anyway.
Nearby
Other towns near Acocks Green:
Other extensions in Acocks Green
- Rear
- Side
- Wraparound
- Part two-storey
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Acocks Green · Extensions over a garage across the West Midlands
The quickest next step is a visit. We'll look at your house in Acocks Green and give you an honest view of the options.