Bungalow and upward extensions in Corsham

Covering Corsham

Corsham sits 19 miles south-west of Swindon, with Chippenham 3 miles to the north-east and Calne 8 miles to the east.

Homes in the South West

In the South West, matching local stone, render or slate is often the main design question, and conservation areas and listed buildings are common in historic towns.

What goes into an upward extension?

An upward extension adds a new storey on top of an existing house, most often turning a bungalow into a two-storey or chalet-style home. It can double the floor area without using any of the garden.

Structural survey of walls and foundations
Design and planning or prior approval application
Staircase and changes to the ground floor layout

What is the guide price for an upward extension in Corsham?

Indicative costs for bungalow and upward extensions. London and the South East usually sit towards the top of each range.

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

Do you need permission for an upward extension in Corsham?

Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 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 affect an upward extension?

Some bungalow foundations need strengthening before a storey can be added.
The staircase takes space from the ground floor plan.

What happens after I enquire?

Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
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 Corsham

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 we need to move out?

Often for part of the job, while the roof is off and the new floor is formed. We plan this with you.

Do you work in Corsham?

Yes. Corsham is within our coverage for bungalow and upward extensions, along with nearby Chippenham and Calne.

Other towns nearby

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