House extensions in Thornton-Cleveleys
We design and build house extensions for homes in Thornton-Cleveleys and the surrounding Lancashire area, with guide prices adjusted for the region.
- Postcode districtsFY2, FY5, FY6
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Which extension suits a Thornton-Cleveleys 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 single-storey rear extensions gives the most useful space for the budget.
Covering Thornton-Cleveleys and nearby
Site visits are available across Thornton-Cleveleys (FY2, FY5, FY6). We also work in nearby Poulton-le-Fylde (3 miles), Fleetwood (4 miles), Blackpool (4 miles), Lytham St Annes (9 miles), Morecambe (15 miles). Southport, in Merseyside, is roughly 16 miles from Thornton-Cleveleys and also on our list.
Do extensions in Thornton-Cleveleys 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).
Popular extension prices in Thornton-Cleveleys
Use these Thornton-Cleveleys 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) |
|---|---|---|
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
Every extension type in Thornton-Cleveleys
- Kitchen extensions · from £25,500
- Conservatory replacement extensions · from £19,000
- Annexe extensions · from £52,000
- Flat roof extensions · from £19,500
- Building regulations for extensions · from £850
- Bedroom extensions · from £24,500
- Utility and boot room extensions · from £13,000
- Timber frame extensions · from £19,500
- Home office extensions · from £15,000
- Bungalow extensions · from £24,500
- Single-storey rear extensions · from £19,500
- Wraparound extensions · from £34,000
- Double-storey extensions · from £36,000
- Side extensions · from £20,500
- Extensions over a garage · from £22,500
- Side return extensions · from £17,000
- Pitched roof extensions · from £21,000
- Glass box extensions · from £28,500
- Planning permission for extensions · from £300
- Porch extensions · from £3,800
- Extension plans and drawings · from £1,100
- Orangery extensions · from £28,500
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Thornton-Cleveleys
How much does an extension cost in Thornton-Cleveleys?
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 Thornton-Cleveleys?
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.
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 Thornton-Cleveleys?
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.
Book a free site visit in Thornton-Cleveleys
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.