Extensions over a garage in Gelligaer
Our extensions over a garage service in Gelligaer covers everything: measured survey, design, planning or permitted development checks, structural design, building control and the build itself.
Gelligaer: the key facts for this kind of project.
- Postcode districts
- CF82
- County / area
- Gwent, Wales
- Price region
- Wales
- Guide price
- £29,000–£42,000 (£1,610–£2,350 per m²)
- Approval route
- Can be permitted development in Wales if it is 10.5 m from the side boundary, set back 1 m from the front and doesn't widen the house by more than half; otherwise planning permission.
- Nearest towns
- Hengoed (1.4 miles), Nelson (Mid Glamorgan) (1.4 miles), Bargoed (1.6 miles)
- Distance to Newport (Gwent)
- about 12.3 miles
- First visit
- Free, no obligation
About an extension over a garage
An extension over a garage suits you if you have an attached single garage beside the house and need an extra bedroom or a larger main bedroom with an en-suite. You get an inspection of the garage structure, a design that matches the house, the approvals your nation needs, structural design, building regulations approval and the build, carried out by vetted teams working under S&K.
Around Gelligaer we also work in Hengoed, Nelson (Mid Glamorgan) and Bargoed, and across the rest of Gwent. Postcode district in and near Gelligaer: CF82.
What it costs in Gelligaer
A guide price for Gelligaer: around £29,000–£42,000 for 3 m × 6 m of new first-floor space (18 m²). That works out at £1,610–£2,350 per m² of new floor space, including VAT at 20%. Professional fees for drawings and the structural engineer are listed separately on our prices page.
| Spec | Per m² | 3 m × 6 m of new first-floor space (18 m²) |
|---|---|---|
| Essential | £1,480–£2,160 per m² | £26,500–£39,000 |
| Standard | £1,610–£2,350 per m² | £29,000–£42,000 |
| Premium | £1,930–£2,820 per m² | £35,000–£50,500 |
Planning and building regulations in Gelligaer
In Wales, building over a side garage can be permitted development if the result is at least 10.5 m from the boundary opposite the side wall, set back at least 1 m from the front of the house and does not widen the house by more than 50%. Garages close to the boundary usually fail these tests, so a householder application costing £585 is often needed.
Approval in Wales: Householder planning application: £585. Councils normally decide householder applications within 8 weeks.
Building regulations: Building regulations approval under the Welsh Approved Documents, which differ from England's in places (notably energy efficiency).
Design points for Gelligaer homes
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.
Garage walls and the door opening
Garage walls are often a single skin of brick or block with piers, and the wide door opening needs a beam over it. Many over-garage extensions need new inner walls or a steel frame to carry the floor and to insulate properly, which we confirm before the design is fixed.
How we'd run your project
Free site visit
We visit your home in Gelligaer, look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Design and approvals
We draw the extension and check it against the rules for Wales, then apply for planning permission or a certificate of lawfulness, whichever fits.
Detail and price
Construction drawings, engineer's calculations and building control sign-off, then a written fixed price for the build.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.
Questions about extensions over a garage in Gelligaer
Which postcodes do you cover around Gelligaer?
We cover Gelligaer (CF82) and nearby places including Hengoed, Nelson (Mid Glamorgan) and Bargoed, plus the rest of Gwent. The first site visit is free.
Do I need planning permission for an extension over a garage in Gelligaer?
Gelligaer is in Wales, so Wales planning rules apply. Can be permitted development in Wales if it is 10.5 m from the side boundary, set back 1 m from the front and doesn't widen the house by more than half; otherwise planning permission. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.
How much does an extension over a garage cost in Gelligaer?
Our guide for Wales, which covers Gelligaer, is £1,610–£2,350 per m² including VAT. A typical project with 3 m × 6 m of new first-floor space (18 m²) comes to about £29,000–£42,000. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
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.
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.
Nearby
The same service in neighbouring towns:
Other extensions in Gelligaer
- Rear
- Side
- Wraparound
- Part two-storey
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Gelligaer · Extensions over a garage across Gwent
Want a figure first? Try our guide price tool, then book a free visit to firm it up.