Portishead, Somerset
Wraparound extension in Portishead
An L-shaped extension that fills the side return and runs across the back. We design, get the approvals for and build wraparound extensions in Portishead and the surrounding area, with one contract from the first survey to building control sign-off.
Portishead is covered from our Somerset round, including BS20. Wraparound projects around Portishead often involve two neighbours, so we start the party wall conversations early.
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 wraparound extension cost in Portishead?
In Portishead, our guide for a wraparound extension is £2,290–£3,740 per square metre including VAT for a standard specification. South West prices run slightly above our West Midlands baseline; natural stone to match the house is the main variable.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £50,500–£82,500 |
| L-shaped, about 30 m² of new floor | £68,500–£112,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a wraparound extension in Portishead?
Here is how the rules in England apply to a wraparound extension in Portishead.
Side return infills and the side leg of a wraparound are treated as side extensions in England: single-storey, no more than 4 metres high and no wider than half the original house. They are not permitted development in conservation areas, National Parks or National Landscapes, and a joined wraparound often needs a planning application because the side and rear rules apply together.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Portishead like to extend?
Stone-built and rendered houses are common around Portishead, so matching the walling is a design decision in its own right: natural stone, reconstituted stone or a render finish across old and new.
How a wraparound extension in Portishead 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.
Wraparound extensions near Portishead
Neighbouring places we cover include Nailsea (3.5 miles) and Clevedon (4.7 miles).
- Wraparound extension in Nailsea
- Wraparound extension in Clevedon
- Wraparound extension in Yatton
- Wraparound extension in Caldicot
- Wraparound extension in Bristol
Other work in Portishead:
FAQ
Wraparound extension questions in Portishead
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Is the site visit in Portishead free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Is it worth it over a side return alone?
If you want a dining table and a sofa as well as the kitchen, usually yes.
How long does a rear extension take to build in Portishead?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do I need planning permission for a rear extension in Portishead?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
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.