Uxbridge, Greater London
Two-storey rear extension in Uxbridge
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. If you live in Uxbridge and want to know what a two-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Uxbridge sits in Greater London, with postcode districts including UB8, UB10 and UB11. In Greater London we check the neighbours' rear windows first, because the upper floor is where most two-storey schemes win or lose planning.
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 two-storey rear extension cost in Uxbridge?
A two-storey rear extension in Uxbridge is priced at £2,340–£3,510 per square metre including VAT as a guide, before kitchen fit-out and fees. London prices sit at the top of our range because of labour rates, access through the house, parking suspensions and skip licences.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £70,000–£105,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £112,500–£168,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a two-storey rear extension in Uxbridge?
Here is how the rules in England apply to a two-storey rear extension in Uxbridge.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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 Uxbridge like to extend?
Much of Uxbridge is 1920s and 1930s semis and short terraces with longer gardens than inner London, which suit full-width single-storey rear extensions. Parking suspensions, skip licences and controlled hours on residential streets shape the programme more than the build itself.
How a two-storey rear extension in Uxbridge 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Two-storey rear extensions near Uxbridge
Close by, we work in Hillingdon, about 1.7 miles away, and Ickenham, about 2.0 miles away.
- Two-storey rear extension in Hillingdon
- Two-storey rear extension in Ickenham
- Two-storey rear extension in Ruislip
- Two-storey rear extension in South Ruislip
- Two-storey rear extension in Hayes
Other work in Uxbridge:
FAQ
Two-storey rear extension questions in Uxbridge
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.
Is the site visit in Uxbridge free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can I add an en-suite upstairs?
Yes. We plan the soil pipe route early so the bathroom sits where drainage works without boxing through the room below.
Can you match the brick or stone on my Uxbridge house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around Uxbridge?
Including UB8, UB10 and UB11, and the surrounding Greater London area.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.