Extending your home in Aberdare
We design and build house extensions for homes in Aberdare and the surrounding Mid Glamorgan area, with guide prices adjusted for the region.
- Postcode districtsCF44
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Areas we cover around Aberdare
Across CF44, we can visit, measure and advise. We also work in nearby Rhondda (4 miles), Merthyr Tydfil (4 miles), Tonypandy (6 miles), Gelligaer (9 miles), Pontypridd (9 miles). Just over the Gwent border, Ebbw Vale is about 11 miles away.
Do extensions in Aberdare need planning permission?
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).
Aberdare extension prices at a glance
We publish guide prices so you can budget before anyone visits. For Aberdare they are adjusted by ×0.93, the factor we use across Wales.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
What works best for Aberdare houses?
Welsh housing ranges from stone terraces in the valleys to render-and-slate houses and modern estates, and the Welsh planning rules differ from England's in several places.
Depending on the plot, side return extensions and bungalow extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Extension types and starting prices
- Extension plans and drawings · from £1,100
- Glass box extensions · from £27,500
- Orangery extensions · from £27,500
- Flat roof extensions · from £19,500
- Bedroom extensions · from £24,000
- Home office extensions · from £14,500
- Wraparound extensions · from £33,000
- Porch extensions · from £3,700
- Timber frame extensions · from £19,500
- Extensions over a garage · from £22,000
- Building regulations for extensions · from £800
- Conservatory replacement extensions · from £18,500
- Side return extensions · from £16,500
- Pitched roof extensions · from £20,500
- Double-storey extensions · from £35,000
- Annexe extensions · from £51,000
- Single-storey rear extensions · from £19,500
- Planning permission for extensions · from £300
- Kitchen extensions · from £25,000
- Side extensions · from £20,000
- Bungalow extensions · from £24,000
- Utility and boot room extensions · from £13,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
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 Aberdare
How much does an extension cost in Aberdare?
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.
Will my neighbours need to be told?
If you apply for planning the council notifies them, and in Wales party wall notices may be needed for work near a shared boundary.
Do I need planning permission for an extension in Aberdare?
Not always. It depends on the size, position and your property's history. In Wales many single-storey rear extensions up to 4 m are permitted development.
Do you cover all of Aberdare?
Yes, including the surrounding parts of Mid Glamorgan. Site visits are free and there is no obligation.
How long does an extension take in Aberdare?
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.
Book a free site visit in Aberdare
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.