Gainsborough, Lincolnshire
Bungalow rear extension in Gainsborough
Single-storey rear extensions that keep everything on one level. If you live in Gainsborough 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.
Gainsborough sits in Lincolnshire, with postcode districts including DN21. For bungalows in Lincolnshire, 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 Gainsborough?
In Gainsborough, our guide for a bungalow rear extension is £1,790–£2,910 per square metre including VAT for a standard specification. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £21,500–£35,000 |
| 4 m wide × 6 m deep (24 m²) | £43,000–£70,000 |
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 Gainsborough?
Planning for a bungalow rear extension in Gainsborough follows the English householder rules.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it 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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Gainsborough like to extend?
Red-brick terraces and semis are typical of Gainsborough. Coal-mining legacy areas in parts of the East Midlands can need a Coal Authority check before foundations are designed.
How a bungalow rear extension in Gainsborough 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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 Gainsborough
We also build rear extensions for bungalows in nearby Retford (8.4 miles) and Scunthorpe (14.3 miles).
- Bungalow rear extension in Retford
- Bungalow rear extension in Scunthorpe
- Bungalow rear extension in Lincoln
- Bungalow rear extension in Boughton
- Bungalow rear extension in Worksop
Other work in Gainsborough:
FAQ
Bungalow rear extension questions in Gainsborough
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
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.
Is a bungalow extension cheaper?
The rates are similar per square metre; roof work can add a little.
How much does a bungalow rear extension cost in Gainsborough?
As a guide, £1,790–£2,910 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £21,500–£35,000 at that rate. Your written price follows the survey.
Can you match the brick or stone on my Gainsborough 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 Gainsborough?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.