Portswood, Hampshire
Bungalow rear extension in Portswood
Single-storey rear extensions that keep everything on one level. We design, get the approvals for and build rear extensions for bungalows in Portswood and the surrounding area, with one contract from the first survey to building control sign-off.
Portswood sits in Hampshire, with postcode districts including SO14, SO17 and SO18. For Portswood 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 Portswood?
In Portswood, 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 Portswood?
The planning route for a bungalow rear extension in Portswood is set by England's householder rules and your council.
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 Portswood like to extend?
Commuter semis and detached houses make up much of Portswood, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a bungalow rear extension in Portswood comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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 Portswood
Close by, we work in Southampton, about 1.7 miles away, and Woolston, about 2.4 miles away.
- Bungalow rear extension in Southampton
- Bungalow rear extension in Woolston
- Bungalow rear extension in Eastleigh
- Bungalow rear extension in Bishopstoke
- Bungalow rear extension in Hedge End
Other work in Portswood:
FAQ
Bungalow rear extension questions in Portswood
Do I need planning permission for a rear extension in Portswood?
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.
Do you handle building control in Portswood?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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 Portswood?
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.
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.
Can you match the brick or stone on my Portswood house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.