Extensions in Golborne: design, planning and build
More space without moving: we plan and build extensions across Golborne, with one team for the drawings, the council and the build.
- Postcode districtsWA12
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Popular extension prices in Golborne
Use these Golborne 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) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
Golborne and surrounding towns
Our survey diary covers Golborne, including WA12. We also work in nearby Newton-le-Willows (2 miles), St Helens (6 miles), Prescot (9 miles), Huyton (11 miles), Kirkby (12 miles). For homes towards Greater Manchester, Ashton-in-Makerfield is around 2 miles away.
Which extension suits a Golborne 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, single-storey rear extensions, kitchen extensions or side return extensions gives the most useful space for the budget.
Do extensions in Golborne 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).
Choose an extension type
- Extensions over a garage · from £22,500
- Double-storey extensions · from £36,000
- Side return extensions · from £17,000
- Orangery extensions · from £28,500
- Kitchen extensions · from £25,500
- Wraparound extensions · from £34,000
- Bedroom extensions · from £24,500
- Planning permission for extensions · from £300
- Utility and boot room extensions · from £13,000
- Bungalow extensions · from £24,500
- Side extensions · from £20,500
- Single-storey rear extensions · from £19,500
- Building regulations for extensions · from £850
- Home office extensions · from £15,000
- Glass box extensions · from £28,500
- Annexe extensions · from £52,000
- Pitched roof extensions · from £21,000
- Conservatory replacement extensions · from £19,000
- Porch extensions · from £3,800
- Flat roof extensions · from £19,500
- Extension plans and drawings · from £1,100
- Timber frame extensions · from £19,500
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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 Golborne
How much does an extension cost in Golborne?
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 Golborne?
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 I need planning permission for an extension in Golborne?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Golborne, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Golborne?
Yes, including the surrounding parts of Merseyside. Site visits are free and there is no obligation.
Book a free site visit in Golborne
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.