House extensions in Aberystwyth
We design and build house extensions for homes in Aberystwyth and the surrounding Dyfed area, with guide prices adjusted for the region.
- Postcode districtsSY23
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
What works best for Aberystwyth houses?
In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
Depending on the plot, single-storey rear extensions and side return extensions are often the strongest options, with pitched roof extensions worth considering where there is room.
Popular extension prices in Aberystwyth
Prices on this page use our Wales factor of ×0.93, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
Do extensions in Aberystwyth 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 single-storey side return can fall within permitted development if it stays within the 4 m height limit and the width rules for side extensions. Conservation areas and listed buildings need consent, and the Party Wall Act applies to work on or near a shared wall.
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).
Areas we cover around Aberystwyth
Across SY23, we can visit, measure and advise. The same team covers Carmarthen (40 miles), Ammanford (43 miles), Llanelli (51 miles), Haverfordwest (57 miles), Pembroke Dock (62 miles), all within easy reach. Llandrindod Wells, in Powys, is roughly 32 miles from Aberystwyth and also on our list.
Extension types and starting prices
- Conservatory replacement extensions · from £18,500
- Timber frame extensions · from £19,500
- Building regulations for extensions · from £800
- Extensions over a garage · from £22,000
- Glass box extensions · from £27,500
- Annexe extensions · from £51,000
- Planning permission for extensions · from £300
- Double-storey extensions · from £35,000
- Bungalow extensions · from £24,000
- Extension plans and drawings · from £1,100
- Single-storey rear extensions · from £19,500
- Side return extensions · from £16,500
- Pitched roof extensions · from £20,500
- Bedroom extensions · from £24,000
- Side extensions · from £20,000
- Utility and boot room extensions · from £13,000
- Home office extensions · from £14,500
- Flat roof extensions · from £19,500
- Porch extensions · from £3,700
- Kitchen extensions · from £25,000
- Wraparound extensions · from £33,000
- Orangery extensions · from £27,500
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 produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Aberystwyth
How much does an extension cost in Aberystwyth?
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.
Do I need planning permission for an extension in Aberystwyth?
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.
How long does an extension take in Aberystwyth?
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.
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 you cover all of Aberystwyth?
Yes, including the surrounding parts of Dyfed. Site visits are free and there is no obligation.
Book a free site visit in Aberystwyth
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.