St Leonards-on-Sea, East Sussex
Bungalow rear extension in St Leonards-on-Sea
Bungalow rear extension in St Leonards-on-Sea: single-storey rear extensions that keep everything on one level. We measure the house, show you what the rules allow, price it in writing and build it.
St Leonards-on-Sea sits in East Sussex, with postcode districts including TN34, TN37 and TN38. For bungalows in East Sussex, 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 St Leonards-on-Sea?
Guide prices for a bungalow rear extension in St Leonards-on-Sea start from our South East England rate of £2,070–£3,360 per square metre, including VAT. 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 |
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 St Leonards-on-Sea?
Whether your bungalow rear extension in St Leonards-on-Sea needs a planning application depends on its size, your house and any local restrictions.
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.
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 St Leonards-on-Sea like to extend?
Around St Leonards-on-Sea the housing ranges from inter-war semis to 1960s and 1970s estates with good-sized gardens. Many of the newer estates had permitted development rights removed by condition, so we check the planning history before anything is drawn.
How a bungalow rear extension in St Leonards-on-Sea 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Bungalow rear extensions near St Leonards-on-Sea
From St Leonards-on-Sea, the nearest places we also cover are Hastings (1.5 miles) and Bexhill-on-Sea (3.3 miles).
- Bungalow rear extension in Hastings
- Bungalow rear extension in Bexhill-on-Sea
- Bungalow rear extension in Hailsham
- Bungalow rear extension in Eastbourne
- Bungalow rear extension in Seaford
Other work in St Leonards-on-Sea:
FAQ
Bungalow rear extension questions in St Leonards-on-Sea
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.
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 deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
Do you handle building control in St Leonards-on-Sea?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How long does a rear extension take to build in St Leonards-on-Sea?
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 St Leonards-on-Sea?
Including TN34, TN37 and TN38, and the surrounding East Sussex area.