Longfield, Kent
Bungalow rear extension in Longfield
Single-storey rear extensions that keep everything on one level. If you live in Longfield 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.
We cover Longfield (DA3, DA4 and DA13) as part of our Kent work. For Longfield 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 Longfield?
In Longfield, our guide for a bungalow rear extension is £2,070–£3,360 per square metre including VAT for a 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 |
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 bungalow rear extension in Longfield?
Whether your bungalow rear extension in Longfield needs a planning application depends on its size, your house and any local restrictions.
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.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Longfield like to extend?
Commuter semis and detached houses make up much of Longfield, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Longfield 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.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Bungalow rear extensions near Longfield
We also build rear extensions for bungalows in nearby Hartley (0.7 miles) and Swanscombe (3.5 miles).
- Bungalow rear extension in Hartley
- Bungalow rear extension in Swanscombe
- Bungalow rear extension in Gravesend
- Bungalow rear extension in Dartford
- Bungalow rear extension in Tilbury
Other work in Longfield:
FAQ
Bungalow rear extension questions in Longfield
How long does a rear extension take to build in Longfield?
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 Longfield house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Is a bungalow extension cheaper?
The rates are similar per square metre; roof work can add a little.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
What postcode areas do you cover around Longfield?
Including DA3, DA4 and DA13, and the surrounding Kent area.
How much does a bungalow rear extension cost in Longfield?
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.