Extending your home in Chorley
From a small utility to a two-storey addition, we take on house extensions throughout Chorley, starting with a free visit and a planning check.
- Postcode districtsPR6, PR7
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Chorley
Every figure below is a guide for Chorley, adjusted for North West England 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) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Wraparound extensions | 25 m² | £54,500 – £69,000 |
Areas we cover around Chorley
Postcode districts we cover around Chorley include PR6, PR7. The same team covers Leyland (4 miles), Darwen (7 miles), Preston (9 miles), Blackburn (9 miles), Skelmersdale (9 miles), all within easy reach. Just over the Greater Manchester border, Horwich is about 4 miles away.
Do extensions in Chorley 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 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).
Which extension suits a Chorley home?
Across the North West, terraced houses with small rear yards suit compact rear and side return extensions, while suburban semis have room for more.
For many houses here, kitchen extensions, side return extensions or double-storey extensions gives the most useful space for the budget.
Every extension type in Chorley
- Porch extensions · from £3,800
- Extension plans and drawings · from £1,100
- Home office extensions · from £15,000
- Building regulations for extensions · from £850
- Utility and boot room extensions · from £13,000
- Wraparound extensions · from £34,000
- Glass box extensions · from £28,500
- Conservatory replacement extensions · from £19,000
- Side return extensions · from £17,000
- Flat roof extensions · from £19,500
- Kitchen extensions · from £25,500
- Single-storey rear extensions · from £19,500
- Bungalow extensions · from £24,500
- Planning permission for extensions · from £300
- Extensions over a garage · from £22,500
- Pitched roof extensions · from £21,000
- Side extensions · from £20,500
- Annexe extensions · from £52,000
- Bedroom extensions · from £24,500
- Orangery extensions · from £28,500
- Timber frame extensions · from £19,500
- Double-storey extensions · from £36,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Chorley
How much does an extension cost in Chorley?
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.
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 Chorley?
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 Chorley, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Chorley
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.