Sevenoaks, Kent
Bungalow rear extension in Sevenoaks
Single-storey rear extensions that keep everything on one level. We design, get the approvals for and build rear extensions for bungalows in Sevenoaks and the surrounding area, with one contract from the first survey to building control sign-off.
Sevenoaks sits in Kent, with postcode districts including TN13. For bungalows in Kent, a rear extension is the usual way to add space without adding stairs.
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 Sevenoaks?
For Sevenoaks we work from the South East England rate: £2,070–£3,360 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 wide × 4 m deep (12 m²) | £25,000–£40,500 |
| 4 m wide × 6 m deep (24 m²) | £49,500–£80,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a bungalow rear extension in Sevenoaks?
Planning for a bungalow rear extension in Sevenoaks follows the English householder rules.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is 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 Sevenoaks like to extend?
Commuter semis and detached houses make up much of Sevenoaks, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Sevenoaks 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Bungalow rear extensions near Sevenoaks
We also build rear extensions for bungalows in nearby Chelsfield (6.5 miles) and Tonbridge (6.5 miles).
- Bungalow rear extension in Chelsfield
- Bungalow rear extension in Tonbridge
- Bungalow rear extension in Biggin Hill
- Bungalow rear extension in Orpington
- Bungalow rear extension in Oxted
Other work in Sevenoaks:
FAQ
Bungalow rear extension questions in Sevenoaks
How long does a rear extension take to build in Sevenoaks?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can you match the brick or stone on my Sevenoaks house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do I need to move out?
Rarely; the opening into the bungalow is made late in the build.
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.
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 Sevenoaks?
As a guide, £2,070–£3,360 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £25,000–£40,500 at that rate. Your written price follows the survey.