House extensions in Deal
More space without moving: we plan and build extensions across Deal, with one team for the drawings, the council and the build.
- Postcode districtsCT14
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Approvals for an extension in Deal
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 single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
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.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
What works best for Deal houses?
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.
Depending on the plot, single-storey rear extensions and orangery extensions are often the strongest options, with double-storey extensions worth considering where there is room.
Covering Deal and nearby
Site visits are available across Deal (CT14). Nearby, we also take on projects in Dover (8 miles), Ramsgate (8 miles), Broadstairs (9 miles), Margate (11 miles), Folkestone (14 miles). Just over the Essex border, Southend-on-Sea is about 37 miles away.
Guide prices for Deal
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) |
|---|---|---|
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
Every extension type in Deal
- Timber frame extensions · from £23,500
- Kitchen extensions · from £30,000
- Flat roof extensions · from £23,500
- Building regulations for extensions · from £1,000
- Extension plans and drawings · from £1,300
- Orangery extensions · from £33,500
- Home office extensions · from £17,500
- Porch extensions · from £4,450
- Utility and boot room extensions · from £15,500
- Extensions over a garage · from £26,500
- Double-storey extensions · from £42,500
- Wraparound extensions · from £40,000
- Planning permission for extensions · from £350
- Pitched roof extensions · from £24,500
- Conservatory replacement extensions · from £22,000
- Bungalow extensions · from £29,000
- Glass box extensions · from £33,500
- Single-storey rear extensions · from £23,500
- Bedroom extensions · from £29,000
- Side extensions · from £24,500
- Annexe extensions · from £61,500
- Side return extensions · from £20,000
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 draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Deal
How much does an extension cost in Deal?
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.
Do you cover all of Deal?
Yes, including the surrounding parts of Kent. Site visits are free and there is no obligation.
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.
Do I need planning permission for an extension in Deal?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
Book a free site visit in Deal
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.