Extending your home in Gravesend
From a small utility to a two-storey addition, we take on house extensions throughout Gravesend, starting with a free visit and a planning check.
- Postcode districtsDA10, DA11, DA12
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Guide prices for Gravesend
We publish guide prices so you can budget before anyone visits. For Gravesend they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| 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 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
Areas we cover around Gravesend
Across DA10, DA11, DA12, we can visit, measure and advise. We also work in nearby Strood (6 miles), Dartford (7 miles), Rochester (7 miles), Chatham (8 miles), Gillingham (8 miles). Grays, in Essex, is roughly 3 miles from Gravesend and also on our list.
Planning and building control in Gravesend
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).
Which extension suits a Gravesend home?
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.
Start by comparing orangery extensions, double-storey extensions and single-storey rear extensions: between them they cover most of the layouts we see requested for houses like these.
Choose an extension type
- Wraparound extensions · from £40,000
- Pitched roof extensions · from £24,500
- Bedroom extensions · from £29,000
- Conservatory replacement extensions · from £22,000
- Extensions over a garage · from £26,500
- Extension plans and drawings · from £1,300
- Side return extensions · from £20,000
- Bungalow extensions · from £29,000
- Planning permission for extensions · from £350
- Orangery extensions · from £33,500
- Annexe extensions · from £61,500
- Kitchen extensions · from £30,000
- Timber frame extensions · from £23,500
- Porch extensions · from £4,450
- Home office extensions · from £17,500
- Glass box extensions · from £33,500
- Flat roof extensions · from £23,500
- Utility and boot room extensions · from £15,500
- Single-storey rear extensions · from £23,500
- Building regulations for extensions · from £1,000
- Side extensions · from £24,500
- Double-storey extensions · from £42,500
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
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Gravesend
How much does an extension cost in Gravesend?
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 Gravesend?
Yes, including the surrounding parts of Kent. Site visits are free and there is no obligation.
How long does an extension take in Gravesend?
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.
Do I need planning permission for an extension in Gravesend?
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.
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.
Book a free site visit in Gravesend
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.