Maidstone, Kent
Two-storey rear extension in Maidstone
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. If you live in Maidstone 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.
Maidstone and its postcode districts ME14, ME15 and ME16 are part of our Kent coverage. In Kent 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 Maidstone?
For Maidstone we work from the South East England rate: £2,020–£3,020 per square metre of new floor, including VAT, standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £60,500–£90,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £97,000–£145,000 |
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 two-storey rear extension in Maidstone?
Whether your two-storey rear extension in Maidstone needs a planning application depends on its size, your house and any local restrictions.
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 Maidstone like to extend?
Maidstone has a mix of Victorian terraces near the centre and larger Edwardian and inter-war houses further out. Clay soils across much of the South East mean deeper foundations near trees, which we plan for at the survey.
How a two-storey rear extension in Maidstone 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
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 Maidstone
We also build two-storey rear extensions in nearby Snodland (5.4 miles) and Chatham (7.8 miles).
- Two-storey rear extension in Snodland
- Two-storey rear extension in Chatham
- Two-storey rear extension in Rochester
- Two-storey rear extension in Gillingham
- Two-storey rear extension in Strood
Other work in Maidstone:
FAQ
Two-storey rear extension questions in Maidstone
Do I need planning permission for a rear extension in Maidstone?
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.
Is the site visit in Maidstone free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Is two-storey cheaper per square metre than single-storey?
Usually yes, because the foundations and roof are shared across twice the floor area. The total cost is higher.
How long does a rear extension take to build in Maidstone?
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 Maidstone?
Including ME14, ME15 and ME16, and the surrounding Kent area.
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.