House extensions in Chatham
Looking to extend your home in Chatham? Start here: extension types, guide prices for Chatham, the planning rules that apply and how a project runs.
- Postcode districtsME1, ME2, ME4, ME5, ME7, ME8
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
What works best for Chatham houses?
Homes across the South East range from Victorian terraces in the older town centres to large detached houses on the edges, so the right extension type varies street by street.
Depending on the plot, orangery extensions and wraparound extensions are often the strongest options, with double-storey extensions worth considering where there is room.
Areas we cover around Chatham
Across ME1, ME2, ME4, ME5, ME7, ME8, we can visit, measure and advise. The same team covers Rochester (1 mile), Gillingham (1 mile), Strood (2 miles), Maidstone (8 miles), Gravesend (8 miles), all within easy reach. For homes towards Essex, Canvey Island is around 10 miles away.
Chatham extension prices at a glance
Use these Chatham guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
Planning rules in Chatham
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 return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
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).
All extension types we build in Chatham
- Pitched roof extensions · from £24,500
- Timber frame extensions · from £23,500
- Glass box extensions · from £33,500
- Bungalow extensions · from £29,000
- Wraparound extensions · from £40,000
- Kitchen extensions · from £30,000
- Conservatory replacement extensions · from £22,000
- Extensions over a garage · from £26,500
- Home office extensions · from £17,500
- Single-storey rear extensions · from £23,500
- Double-storey extensions · from £42,500
- Annexe extensions · from £61,500
- Planning permission for extensions · from £350
- Orangery extensions · from £33,500
- Side extensions · from £24,500
- Porch extensions · from £4,450
- Extension plans and drawings · from £1,300
- Building regulations for extensions · from £1,000
- Flat roof extensions · from £23,500
- Utility and boot room extensions · from £15,500
- Side return extensions · from £20,000
- Bedroom extensions · from £29,000
Free site visit
We visit your Chatham home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Chatham
How much does an extension cost in Chatham?
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 handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do I need planning permission for an extension in Chatham?
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.
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Chatham, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Chatham
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.