Harrow on the Hill, Greater London
Bungalow rear extension in Harrow on the Hill
Single-storey rear extensions that keep everything on one level. If you live in Harrow on the Hill and want to know what a bungalow rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Harrow on the Hill is covered from our Greater London round, including HA1, HA2 and HA3. For Harrow on the Hill bungalows we design the roof first, because the low eaves decide the height of the new room.
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 bungalow rear extension cost in Harrow on the Hill?
A bungalow rear extension in Harrow on the Hill is priced at £2,400–£3,900 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 wide × 4 m deep (12 m²) | £29,000–£47,000 |
| 4 m wide × 6 m deep (24 m²) | £57,500–£93,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a bungalow rear extension in Harrow on the Hill?
The planning route for a bungalow rear extension in Harrow on the Hill is set by England's householder rules and your council.
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 also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
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 Harrow on the Hill like to extend?
Harrow on the Hill is mostly 1930s semis, short terraces and post-war houses, so full-width single-storey and two-storey rear extensions are realistic on many plots. Some later estates had permitted development rights removed by condition, so we check the planning history first.
How a bungalow rear extension in Harrow on the Hill comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
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.
Bungalow rear extensions near Harrow on the Hill
From Harrow on the Hill, the nearest places we also cover are Harrow (0.5 miles) and Sudbury (1.2 miles).
- Bungalow rear extension in Harrow
- Bungalow rear extension in Sudbury
- Bungalow rear extension in Headstone
- Bungalow rear extension in Wealdstone
- Bungalow rear extension in Wembley
Other work in Harrow on the Hill:
FAQ
Bungalow rear extension questions in Harrow on the Hill
How long does a rear extension take to build in Harrow on the Hill?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.
Do I need to move out?
Rarely; the opening into the bungalow is made late in the build.
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.
How much does a bungalow rear extension cost in Harrow on the Hill?
As a guide, £2,400–£3,900 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £29,000–£47,000 at that rate. Your written price follows the survey.
Is the site visit in Harrow on the Hill free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.