Bungalow and upward extensions in Hampshire

Covering Hampshire

We cover Hampshire, including Southampton, Portsmouth, Basingstoke and Gosport, and the towns around them.

Homes in the South East

Housing across the South East mixes inter-war semis, post-war estates and older cottages in villages and market towns, so rear and side extensions, hip-to-gable lofts and garage conversions all come up regularly.

What does an upward extension involve?

The first question is whether the existing walls and foundations can carry the extra load, so we start with a structural survey. Then we design either a full first floor or a raised roof with dormers, handle planning or prior approval, and build the new storey while protecting the floor below.

Structural survey of walls and foundations
Roof removal and temporary weather protection
New first-floor structure, walls and roof

How much does an upward extension cost in Hampshire?

Use these ranges to budget for bungalow and upward extensions; the survey turns them into a fixed price for the agreed specification.

Bungalow and upward extensions	Guide price incl. VAT
Chalet conversion with dormers (total)	£45,000 to £85,000
New first floor, standard specification	£2,200 to £2,800 per m²
New first floor, good specification	£2,800 to £3,300 per m²
New first floor, high specification	£3,300 to £3,800 per m²

How is an upward extension approved in Hampshire?

In England we deal with the council’s planning team for permission or a lawful development certificate, with building control (the council or a registered building control approver) for inspections, and with neighbours under the Party Wall etc. Act 1996 where it applies.

In England, Class AA permitted development allows an extra storey on many detached and semi-detached houses built between July 1948 and October 2018, subject to a prior approval application covering design, neighbours’ amenity and other matters.

What can change the price or programme?

The staircase takes space from the ground floor plan.
The house is exposed while the roof is off, so the sequence is planned tightly.

From first call to completion

Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
Build and hand over. Our teams build to the programme, building control inspects, and you get the completion paperwork at the end.

Questions about an upward extension in Hampshire

How much does it cost to add a storey?

Around £2,200 to £3,800 per square metre of new floor including VAT, or £45,000 to £85,000 for a chalet conversion with dormers.

Is an upward extension permitted development?

In England, Class AA allows it on many post-1948 houses through a prior approval application. Elsewhere planning permission is needed.

Do you work in Hampshire?

Yes. Hampshire is within our coverage for bungalow and upward extensions, along with nearby Southampton and Portsmouth.

Other towns nearby

Learn more about bungalow and upward extensions, or see every project we cover in Hampshire.