House extensions in Haverfordwest
Looking to extend your home in Haverfordwest? Start here: extension types, guide prices for Haverfordwest, the planning rules that apply and how a project runs.
- Postcode districtsSA61
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Covering Haverfordwest and nearby
We cover Haverfordwest and the postcode districts SA61. Nearby, we also take on projects in Pembroke Dock (8 miles), Carmarthen (29 miles), Llanelli (36 miles), Ammanford (42 miles), Aberystwyth (57 miles). Just over the West Glamorgan border, Gorseinon is about 41 miles away.
Haverfordwest extension prices at a glance
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 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
Which extension suits a Haverfordwest home?
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 pitched roof extensions are often the strongest options, with side return extensions worth considering where there is room.
Planning and building control in Haverfordwest
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.
The Party Wall etc. Act 1996 applies in Wales as in England: notice must be served before work to a shared wall, building on the boundary, or excavating close to a neighbour's foundations.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
All extension types we build in Haverfordwest
- Double-storey extensions · from £35,000
- Utility and boot room extensions · from £13,000
- Bungalow extensions · from £24,000
- Side extensions · from £20,000
- Annexe extensions · from £51,000
- Home office extensions · from £14,500
- Conservatory replacement extensions · from £18,500
- Timber frame extensions · from £19,500
- Building regulations for extensions · from £800
- Side return extensions · from £16,500
- Extension plans and drawings · from £1,100
- Flat roof extensions · from £19,500
- Bedroom extensions · from £24,000
- Single-storey rear extensions · from £19,500
- Planning permission for extensions · from £300
- Pitched roof extensions · from £20,500
- Glass box extensions · from £27,500
- Porch extensions · from £3,700
- Kitchen extensions · from £25,000
- Extensions over a garage · from £22,000
- Wraparound extensions · from £33,000
- Orangery extensions · from £27,500
Free site visit
We visit your Haverfordwest home, measure up, talk through what you want and check the planning position.
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 Haverfordwest
How much does an extension cost in Haverfordwest?
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 Haverfordwest?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Haverfordwest, and the guide-price tool gives a range for your own size and finish in about a minute.
How long does an extension take in Haverfordwest?
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 Haverfordwest
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.