House extensions in Peacehaven
Looking to extend your home in Peacehaven? Start here: extension types, guide prices for Peacehaven, the planning rules that apply and how a project runs.
- Postcode districtsBN10
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Peacehaven extension prices at a glance
Prices on this page use our South East England factor of ×1.12, 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 | £33,500 – £43,500 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
Peacehaven and surrounding towns
Site visits are available across Peacehaven (BN10). We also work in nearby Seaford (5 miles), Brighton (6 miles), Hove (7 miles), Portslade (10 miles), Hailsham (12 miles). For homes towards West Sussex, Shoreham-by-Sea is around 12 miles away.
Which extension suits a Peacehaven home?
The South East has a broad mix of 1930s semis, post-war estates, newer developments and period cottages, and many houses have enough garden for a generous rear extension.
For many houses here, orangery extensions, double-storey extensions or wraparound extensions gives the most useful space for the budget.
Approvals for an extension in Peacehaven
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
In a conservation area, national park, National Landscape, the Broads or a 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. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Every extension type in Peacehaven
- Porch extensions · from £4,450
- Timber frame extensions · from £23,500
- Pitched roof extensions · from £24,500
- Flat roof extensions · from £23,500
- Wraparound extensions · from £40,000
- Bedroom extensions · from £29,000
- Home office extensions · from £17,500
- Extension plans and drawings · from £1,300
- Annexe extensions · from £61,500
- Planning permission for extensions · from £350
- Orangery extensions · from £33,500
- Kitchen extensions · from £30,000
- Double-storey extensions · from £42,500
- Glass box extensions · from £33,500
- Building regulations for extensions · from £1,000
- Bungalow extensions · from £29,000
- Single-storey rear extensions · from £23,500
- Utility and boot room extensions · from £15,500
- Side return extensions · from £20,000
- Side extensions · from £24,500
- Conservatory replacement extensions · from £22,000
- Extensions over a garage · from £26,500
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
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 Peacehaven
How much does an extension cost in Peacehaven?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. Your written price follows the survey.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Who do I contract with?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Book a free site visit in Peacehaven
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.