Portsmouth, Hampshire
Side return extension in Portsmouth
Infilling the narrow passage beside a Victorian or Edwardian back addition. We design, get the approvals for and build side return extensions in Portsmouth and the surrounding area, with one contract from the first survey to building control sign-off.
We cover Portsmouth (PO1, PO2, PO3 and PO4) as part of our Hampshire work. Side return projects in Portsmouth usually start with a drainage survey of the side passage.
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 side return extension cost in Portsmouth?
For Portsmouth we work from the South East England rate: £2,580–£4,260 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 |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £31,000–£51,000 |
| 2.5 m wide × 7 m deep (17.5 m²) | £45,000–£74,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a side return extension in Portsmouth?
Planning for a side return extension in Portsmouth follows the English householder rules.
In England the side part of a side return or wraparound must meet the side-extension rules (one storey, under 4 metres high, no more than half the width of the original house), and those rights do not apply on designated land. Because a wraparound combines a side and a rear extension, many need householder planning permission.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
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 Portsmouth like to extend?
Commuter semis and detached houses make up much of Portsmouth, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a side return extension in Portsmouth 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.
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.
Side return extensions near Portsmouth
Close by, we work in Southsea, about 1.1 miles away, and Gosport, about 1.7 miles away.
- Side return extension in Southsea
- Side return extension in Gosport
- Side return extension in Cosham
- Side return extension in South Hayling
- Side return extension in Fareham
Other work in Portsmouth:
FAQ
Side return extension questions in Portsmouth
Do you handle building control in Portsmouth?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Do I need planning permission for a rear extension in Portsmouth?
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 I need my neighbour's permission?
Not their permission, but in England and Wales you must serve party wall notices, and a neighbour can consent in writing or ask for a surveyor's award.
What postcode areas do you cover around Portsmouth?
Including PO1, PO2, PO3, PO4, PO5 and PO6, and the surrounding Hampshire area.
Is the site visit in Portsmouth free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How much does a side return extension cost in Portsmouth?
As a guide, £2,580–£4,260 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £31,000–£51,000 at that rate. Your written price follows the survey.