House extensions in Gelligaer
Planning an extension in Gelligaer? Compare extension types, see guide prices adjusted for Gelligaer and book a free site visit.
- Postcode districtsCF46, CF82
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Areas we cover around Gelligaer
Our survey diary covers Gelligaer, including CF46, CF82. The same team covers Blackwood (2 miles), Pontypridd (6 miles), Caerphilly (6 miles), Risca (8 miles), Merthyr Tydfil (8 miles), all within easy reach. For homes towards Gwent, Ebbw Vale is around 8 miles away.
Guide prices for Gelligaer
Use these Gelligaer guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
Approvals for an extension in Gelligaer
In Wales a single-storey rear extension can usually project up to 4 m beyond the rear wall without a planning application, if it is no more than 4 m high, keeps eaves to 3 m and overall height to 4 m within 2 m of a boundary, and covers no more than half the land around the original house. Wales has no larger home extension prior approval scheme.
In Wales a rear extension of more than one storey can be permitted development only if the ground floor projects no more than 4 m, the upper floor no more than 3 m, it stays at least 10.5 m from the rear boundary and it is not in a conservation area, national park, National Landscape or World Heritage Site. Anything larger needs a planning application to the council.
In a conservation area, national park, National Landscape or World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building regulations approval is separate from planning. Wales has its own building regulations and approved documents; the council or a registered building control approver checks the plans, inspects the work and issues a completion certificate.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
Which extension suits a Gelligaer home?
In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
Start by comparing side return extensions, bungalow extensions and single-storey rear extensions: between them they cover most of the layouts we see requested for houses like these.
Choose an extension type
- Planning permission for extensions · from £300
- Double-storey extensions · from £35,000
- Wraparound extensions · from £33,000
- Extensions over a garage · from £22,000
- Side extensions · from £20,000
- Glass box extensions · from £27,500
- Flat roof extensions · from £19,500
- Annexe extensions · from £51,000
- Utility and boot room extensions · from £13,000
- Pitched roof extensions · from £20,500
- Orangery extensions · from £27,500
- Single-storey rear extensions · from £19,500
- Bedroom extensions · from £24,000
- Porch extensions · from £3,700
- Extension plans and drawings · from £1,100
- Kitchen extensions · from £25,000
- Bungalow extensions · from £24,000
- Conservatory replacement extensions · from £18,500
- Side return extensions · from £16,500
- Timber frame extensions · from £19,500
- Building regulations for extensions · from £800
- Home office extensions · from £14,500
Free site visit
We visit your Gelligaer home, measure up, talk through what you want and check the planning position.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Gelligaer
How much does an extension cost in Gelligaer?
Using our Wales factor (×0.93), a standard-spec single-storey extension of 20 m² is a guide £38,000 to £48,500 including VAT, and a 32 m² two-storey extension £53,500 to £70,000. Your written price follows the survey.
How long does an extension take in Gelligaer?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Gelligaer, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Gelligaer?
Yes, including the surrounding parts of Mid Glamorgan. Site visits are free and there is no obligation.
Book a free site visit in Gelligaer
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.