House extensions in Ashton-in-Makerfield
From a small utility to a two-storey addition, we take on house extensions throughout Ashton-in-Makerfield, starting with a free visit and a planning check.
- Postcode districtsWN4
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Ashton-in-Makerfield and surrounding towns
Our survey diary covers Ashton-in-Makerfield, including WN4. The same team covers Wigan (4 miles), Hindley (4 miles), Leigh (5 miles), Westhoughton (7 miles), Atherton (7 miles), all within easy reach. Just over the Merseyside border, Golborne is about 2 miles away.
Ashton-in-Makerfield extension prices at a glance
We publish guide prices so you can budget before anyone visits. For Ashton-in-Makerfield they are adjusted by ×0.95, the factor we use across North West England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
Which extension suits a Ashton-in-Makerfield home?
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.
For many houses here, side return extensions, kitchen extensions or double-storey extensions gives the most useful space for the budget.
Do extensions in Ashton-in-Makerfield 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 two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
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).
All extension types we build in Ashton-in-Makerfield
- Orangery extensions · from £28,500
- Single-storey rear extensions · from £19,500
- Home office extensions · from £15,000
- Extensions over a garage · from £22,500
- Timber frame extensions · from £19,500
- Flat roof extensions · from £19,500
- Extension plans and drawings · from £1,100
- Utility and boot room extensions · from £13,000
- Bungalow extensions · from £24,500
- Porch extensions · from £3,800
- Conservatory replacement extensions · from £19,000
- Building regulations for extensions · from £850
- Side extensions · from £20,500
- Planning permission for extensions · from £300
- Glass box extensions · from £28,500
- Pitched roof extensions · from £21,000
- Wraparound extensions · from £34,000
- Bedroom extensions · from £24,500
- Kitchen extensions · from £25,500
- Double-storey extensions · from £36,000
- Annexe extensions · from £52,000
- 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
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
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 Ashton-in-Makerfield
How much does an extension cost in Ashton-in-Makerfield?
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.
How long does an extension take in Ashton-in-Makerfield?
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Ashton-in-Makerfield, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Ashton-in-Makerfield
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.