Extensions over a garage in West Bromwich
We plan and build extensions over a garage for homeowners in West Bromwich and nearby. Every project starts with a free visit and a design stage priced in writing before any work begins.
West Bromwich: the key facts for this kind of project.
- Postcode districts
- B70 and B71
- 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
- Oldbury (1.6 miles), Smethwick (2.1 miles), Wednesbury (2.6 miles)
- Distance to Birmingham
- about 4.7 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.
West Bromwich sits about 4.7 miles from Birmingham. Closer to home, Oldbury is 1.6 miles away and Smethwick 2.1 miles.
What it costs in West Bromwich
For budgeting in West Bromwich, allow around £31,500–£46,000 for an extension over a garage with 3 m × 6 m of new first-floor space (18 m²). That's based on £1,750–£2,550 per m² including VAT for the West Midlands. Kitchens, bathroom fittings and flooring are priced separately so you can compare like with like.
| 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 West Bromwich
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 West Bromwich 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.
Fire separation
If the garage stays a garage, the floor between it and the room above, and any door into the house, must give fire separation under building regulations. That usually means fire-resisting plasterboard ceilings, sealed gaps and a fire door, which we design in from the start.
How we'd run your project
Understand the brief
At your home in West Bromwich we agree what you need: bedroom count, bathroom, kitchen space, and how much garden you want to keep.
Get it approved
Once you're happy with the design we submit it to the council for West Bromwich and deal with any questions from the planning officer.
Technical design
We prepare the building regulations drawings, structural calculations and specification so the build price can be fixed.
Build
Foundations, walls, floor, roof, windows, then first and second fix. We break through into the house as late as we can.
Questions about extensions over a garage in West Bromwich
Which postcodes do you cover around West Bromwich?
We cover West Bromwich (B70 and B71) and nearby places including Oldbury, Smethwick and Wednesbury, plus the rest of the West Midlands. The first site visit is free.
Who handles building regulations for a project in West Bromwich?
We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.
How long does an extension over a garage take?
Allow 4 to 8 weeks for survey and design, then the approval period (councils should decide householder applications within 8 weeks of validation), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.
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.
How do I get into a room over the garage?
Usually through a new opening off the existing landing or a bedroom, so the stairs stay where they are. If the floor levels do not match, a step or two may be needed inside the new room. Where a landing opening is not practical, a new stair from a converted garage is an option.
Nearby
Close to West Bromwich? We work across the area, including:
Other extensions in West Bromwich
- Rear
- Side
- Wraparound
- Part two-storey
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in West Bromwich · Extensions over a garage across the West Midlands
Book a free site visit in West Bromwich and we'll tell you what's possible, what approvals you need and what the design stage would cost.