Home extensions in Rochester
Planning an extension in Rochester? Compare extension types, see guide prices adjusted for Rochester and book a free site visit.
- Postcode districtsME1, ME2, ME4, ME7
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Rochester need planning permission?
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).
Choosing the right extension in Rochester
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, single-storey rear extensions or wraparound extensions gives the most useful space for the budget.
What extensions cost in Rochester
We publish guide prices so you can budget before anyone visits. For Rochester they are adjusted by ×1.12, the factor we use across South East England.
| 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 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
Areas we cover around Rochester
Postcode districts we cover around Rochester include ME1, ME2, ME4, ME7. We also work in nearby Chatham (1 mile), Strood (1 mile), Gillingham (2 miles), Gravesend (7 miles), Maidstone (8 miles). For homes towards Essex, Stanford-le-Hope is around 10 miles away.
Extension types and starting prices
- Double-storey extensions · from £42,500
- Annexe extensions · from £61,500
- Conservatory replacement extensions · from £22,000
- Bedroom extensions · from £29,000
- Planning permission for extensions · from £350
- Orangery extensions · from £33,500
- Wraparound extensions · from £40,000
- Home office extensions · from £17,500
- Single-storey rear extensions · from £23,500
- Side extensions · from £24,500
- Extensions over a garage · from £26,500
- Pitched roof extensions · from £24,500
- Glass box extensions · from £33,500
- Side return extensions · from £20,000
- Kitchen extensions · from £30,000
- Timber frame extensions · from £23,500
- Flat roof extensions · from £23,500
- Building regulations for extensions · from £1,000
- Bungalow extensions · from £29,000
- Utility and boot room extensions · from £15,500
- Porch extensions · from £4,450
- Extension plans and drawings · from £1,300
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
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
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 Rochester
How much does an extension cost in Rochester?
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.
How long does an extension take in Rochester?
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.
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 Rochester
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.