Extending your home in Lancing
We design and build house extensions for homes in Lancing and the surrounding West Sussex area, with guide prices adjusted for the region.
- Postcode districtsBN15
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
What works best for Lancing houses?
In the South East, plenty of houses have already been extended once, which makes checking the remaining permitted development allowance an important early step.
Depending on the plot, orangery extensions and wraparound extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Guide prices for Lancing
We publish guide prices so you can budget before anyone visits. For Lancing they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| 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 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
Approvals for an extension in Lancing
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.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Areas we cover around Lancing
Our survey diary covers Lancing, including BN15. We also work in nearby Shoreham-by-Sea (2 miles), Worthing (2 miles), Littlehampton (10 miles), Burgess Hill (12 miles), Haywards Heath (15 miles). Portslade, in East Sussex, is roughly 5 miles from Lancing and also on our list.
Choose an extension type
- Single-storey rear extensions · from £23,500
- Utility and boot room extensions · from £15,500
- Double-storey extensions · from £42,500
- Side return extensions · from £20,000
- Wraparound extensions · from £40,000
- Extensions over a garage · from £26,500
- Home office extensions · from £17,500
- Porch extensions · from £4,450
- Kitchen extensions · from £30,000
- Side extensions · from £24,500
- Building regulations for extensions · from £1,000
- Annexe extensions · from £61,500
- Bedroom extensions · from £29,000
- Planning permission for extensions · from £350
- Pitched roof extensions · from £24,500
- Extension plans and drawings · from £1,300
- Orangery extensions · from £33,500
- Conservatory replacement extensions · from £22,000
- Bungalow extensions · from £29,000
- Flat roof extensions · from £23,500
- Glass box extensions · from £33,500
- Timber frame extensions · from £23,500
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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 Lancing
How much does an extension cost in Lancing?
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.
Do you cover all of Lancing?
Yes, including the surrounding parts of West Sussex. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Lancing, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Lancing
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.