Collier Row, Greater London
Two-storey rear extension in Collier Row
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Collier Row and the surrounding area, with one contract from the first survey to building control sign-off.
Collier Row sits in Greater London, with postcode districts including RM1, RM5 and RM7. In Collier Row, a two-storey rear extension is worth comparing with the cost of moving once stamp duty, agents' and legal fees are counted.
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 Collier Row?
Guide prices for a two-storey rear extension in Collier Row start from our London rate of £2,340–£3,510 per square metre, including VAT. 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 |
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 two-storey rear extension in Collier Row?
Planning for a two-storey rear extension in Collier Row follows the English householder rules.
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.
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 Collier Row like to extend?
Collier Row 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 two-storey rear extension in Collier Row comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near Collier Row
Neighbouring places we cover include Romford (1.9 miles) and Harold Wood (2.9 miles).
- Two-storey rear extension in Romford
- Two-storey rear extension in Harold Wood
- Two-storey rear extension in Emerson Park
- Two-storey rear extension in Dagenham
- Two-storey rear extension in Goodmayes
Other work in Collier Row:
FAQ
Two-storey rear extension questions in Collier Row
Can you match the brick or stone on my Collier Row house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do you handle building control in Collier Row?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.
Is the site visit in Collier Row free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How long does a rear extension take to build in Collier Row?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
What postcode areas do you cover around Collier Row?
Including RM1, RM5 and RM7, and the surrounding Greater London area.