Home extensions in Walkden
Looking to extend your home in Walkden? Start here: extension types, guide prices for Walkden, the planning rules that apply and how a project runs.
- Postcode districtsBL4, M27, M28, M29, M38
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Walkden
Prices on this page use our North West England factor of ×0.95, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
Choosing the right extension in Walkden
The North West has a high share of Victorian and Edwardian terraces with rear yards and outriggers, plus large areas of inter-war semis in the suburbs.
Depending on the plot, side return extensions and kitchen extensions are often the strongest options, with double-storey extensions worth considering where there is room.
Where we work near Walkden
Across BL4, M27, M28, M29, M38, we can visit, measure and advise. The same team covers Farnworth (2 miles), Swinton (2 miles), Tyldesley (3 miles), Eccles (4 miles), Atherton (4 miles), all within easy reach. Just over the Merseyside border, Golborne is about 9 miles away.
Planning and building control in Walkden
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).
Extension types and starting prices
- Extensions over a garage · from £22,500
- Side extensions · from £20,500
- Timber frame extensions · from £19,500
- Bedroom extensions · from £24,500
- Building regulations for extensions · from £850
- Flat roof extensions · from £19,500
- Wraparound extensions · from £34,000
- Side return extensions · from £17,000
- Glass box extensions · from £28,500
- Bungalow extensions · from £24,500
- Single-storey rear extensions · from £19,500
- Double-storey extensions · from £36,000
- Annexe extensions · from £52,000
- Home office extensions · from £15,000
- Utility and boot room extensions · from £13,000
- Conservatory replacement extensions · from £19,000
- Orangery extensions · from £28,500
- Kitchen extensions · from £25,500
- Porch extensions · from £3,800
- Extension plans and drawings · from £1,100
- Pitched roof extensions · from £21,000
- Planning permission for extensions · from £300
Free site visit
We visit your Walkden home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Walkden
How much does an extension cost in Walkden?
Using our North West England 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 Walkden, 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 you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Walkden
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.