Extending your home in Basildon
Every type of house extension in Basildon, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsSS12, SS13, SS14, SS15, SS16, SS17
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Basildon
Every figure below is a guide for Basildon, adjusted for East of England build costs (×1.06) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
Covering Basildon and nearby
Our survey diary covers Basildon, including SS12, SS13, SS14, SS15, SS16, SS17. Neighbouring towns we cover include Stanford-le-Hope (3 miles), Wickford (4 miles), Billericay (4 miles), Benfleet (5 miles), Canvey Island (6 miles). For homes towards Kent, Gravesend is around 9 miles away.
Approvals for an extension in Basildon
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).
Choosing the right extension in Basildon
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
The types we would usually look at first for a home in Basildon are double-storey extensions, wraparound extensions and bungalow extensions, depending on the garden and how the house is laid out.
Every extension type in Basildon
- Planning permission for extensions · from £350
- Porch extensions · from £4,200
- Bungalow extensions · from £27,500
- Bedroom extensions · from £27,500
- Utility and boot room extensions · from £14,500
- Glass box extensions · from £31,500
- Timber frame extensions · from £22,000
- Side return extensions · from £19,000
- Wraparound extensions · from £38,000
- Home office extensions · from £16,500
- Extensions over a garage · from £25,000
- Side extensions · from £23,000
- Conservatory replacement extensions · from £21,000
- Building regulations for extensions · from £950
- Kitchen extensions · from £28,500
- Single-storey rear extensions · from £22,000
- Pitched roof extensions · from £23,500
- Double-storey extensions · from £40,000
- Orangery extensions · from £31,500
- Extension plans and drawings · from £1,250
- Flat roof extensions · from £22,000
- Annexe extensions · from £58,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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 Basildon
How much does an extension cost in Basildon?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. 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 I need planning permission for an extension in Basildon?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Basildon, and the guide-price tool gives a range for your own size and finish in about a minute.
How long does an extension take in Basildon?
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.
Book a free site visit in Basildon
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.