Poulton-le-Fylde, Lancashire
Semi-detached rear extension in Poulton-le-Fylde
Single or two-storey extensions for semi-detached houses, with side access and one party wall. If you live in Poulton-le-Fylde and want to know what a semi-detached rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Poulton-le-Fylde is covered from our Lancashire round, including FY1, FY2 and FY3. In Poulton-le-Fylde we measure the attached neighbour's extension at the survey, because it often sets the sensible depth for yours.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a semi-detached rear extension cost in Poulton-le-Fylde?
For Poulton-le-Fylde we work from the North West England rate: £1,790–£2,910 per square metre of new floor, including VAT, standard specification. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,500–£35,000 |
| 4 m wide × 5 m deep (20 m²) | £35,500–£58,500 |
| 4 m wide × 6 m deep (24 m²) | £43,000–£70,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a semi-detached rear extension in Poulton-le-Fylde?
Planning for a semi-detached rear extension in Poulton-le-Fylde follows the English householder rules.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Poulton-le-Fylde like to extend?
Stone and brick terraces are common around Poulton-le-Fylde. Where houses back onto a ginnel or alley, deliveries can come in from the rear, which makes the build tidier.
How a semi-detached rear extension in Poulton-le-Fylde comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Semi-detached rear extensions near Poulton-le-Fylde
We also build rear extensions for semi-detached houses in nearby Blackpool (3.0 miles) and Thornton-Cleveleys (3.2 miles).
- Semi-detached rear extension in Blackpool
- Semi-detached rear extension in Thornton-Cleveleys
- Semi-detached rear extension in Cleveleys
- Semi-detached rear extension in Lytham St Annes
- Semi-detached rear extension in Fleetwood
Other work in Poulton-le-Fylde:
FAQ
Semi-detached rear extension questions in Poulton-le-Fylde
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
How long does a rear extension take to build in Poulton-le-Fylde?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Single or two-storey on a semi?
Two-storey if you need bedrooms, single-storey if you need a bigger kitchen. Planning risk is lower for single-storey.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Is the site visit in Poulton-le-Fylde free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.