House extensions in Wellingborough
More space without moving: we plan and build extensions across Wellingborough, with one team for the drawings, the council and the build.
- Postcode districtsNN8, NN29
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
What works best for Wellingborough houses?
The East Midlands has plenty of inter-war and post-war semis and detached houses with room to extend, alongside Victorian terraces in the towns.
Depending on the plot, double-storey extensions and side extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Where we work near Wellingborough
We cover Wellingborough and the postcode districts NN8, NN29. Neighbouring towns we cover include Rushden (4 miles), Kettering (7 miles), Northampton (9 miles), Corby (13 miles), Market Harborough (15 miles). For homes towards Bedfordshire, Bedford is around 15 miles away.
Wellingborough extension prices at a glance
Use these Wellingborough 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) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
Planning and building control in Wellingborough
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.
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).
All extension types we build in Wellingborough
- Single-storey rear extensions · from £19,500
- Kitchen extensions · from £25,500
- Home office extensions · from £15,000
- Extensions over a garage · from £22,500
- Glass box extensions · from £28,500
- Double-storey extensions · from £36,000
- Annexe extensions · from £52,000
- Pitched roof extensions · from £21,000
- Side extensions · from £20,500
- Bedroom extensions · from £24,500
- Side return extensions · from £17,000
- Conservatory replacement extensions · from £19,000
- Wraparound extensions · from £34,000
- Porch extensions · from £3,800
- Planning permission for extensions · from £300
- Building regulations for extensions · from £850
- Utility and boot room extensions · from £13,000
- Orangery extensions · from £28,500
- Bungalow extensions · from £24,500
- Timber frame extensions · from £19,500
- Extension plans and drawings · from £1,100
- Flat roof extensions · from £19,500
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
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 Wellingborough
How much does an extension cost in Wellingborough?
Using our East Midlands factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
Do you cover all of Wellingborough?
Yes, including the surrounding parts of Northamptonshire. Site visits are free and there is no obligation.
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Wellingborough, 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 Wellingborough?
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 Wellingborough
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.