Home extensions in Towcester
Planning an extension in Towcester? Compare extension types, see guide prices adjusted for Towcester and book a free site visit.
- Postcode districtsNN12
- Price regionEast Midlands (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Guide prices for Towcester
Every figure below is a guide for Towcester, adjusted for East Midlands build costs (×0.95) 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 | £42,500 – £53,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
Choosing the right extension in Towcester
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, side extensions and double-storey extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Covering Towcester and nearby
We cover Towcester and the postcode districts NN12. Neighbouring towns we cover include Brackley (9 miles), Northampton (10 miles), Daventry (11 miles), Wellingborough (18 miles), Rushden (20 miles). Milton Keynes, in Buckinghamshire, is roughly 12 miles from Towcester and also on our list.
Do extensions in Towcester 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).
Every extension type in Towcester
- Annexe extensions · from £52,000
- Porch extensions · from £3,800
- Flat roof extensions · from £19,500
- Bedroom extensions · from £24,500
- Wraparound extensions · from £34,000
- Home office extensions · from £15,000
- Extension plans and drawings · from £1,100
- Bungalow extensions · from £24,500
- Extensions over a garage · from £22,500
- Utility and boot room extensions · from £13,000
- Single-storey rear extensions · from £19,500
- Side extensions · from £20,500
- Double-storey extensions · from £36,000
- Pitched roof extensions · from £21,000
- Glass box extensions · from £28,500
- Kitchen extensions · from £25,500
- Orangery extensions · from £28,500
- Planning permission for extensions · from £300
- Timber frame extensions · from £19,500
- Conservatory replacement extensions · from £19,000
- Building regulations for extensions · from £850
- Side return extensions · from £17,000
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
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Towcester
How much does an extension cost in Towcester?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Towcester, and the guide-price tool gives a range for your own size and finish in about a minute.
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.
Do I need planning permission for an extension in Towcester?
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 Towcester
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.