Bungalow and upward extensions in Sunbury-on-Thames

Covering Sunbury-on-Thames

Sunbury-on-Thames sits 13 miles north-east of Guildford, with Walton-on-Thames 1 miles to the south and Hanworth 3 miles to the north-east.

Homes in the South East

The South East has a lot of 1930s and post-war semi-detached housing, well suited to rear extensions and hip-to-gable loft conversions, alongside period properties in conservation areas that need a more careful design.

What is an upward extension?

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.

Design and planning or prior approval application
New first-floor structure, walls and roof
Staircase and changes to the ground floor layout

What is the guide price for an upward extension in Sunbury-on-Thames?

What bungalow and upward extensions typically cost. These are guide ranges; the written quote for your house replaces them.

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 Sunbury-on-Thames?

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. Houses in conservation areas and other protected land need full planning permission, as do most chalet conversions with front dormers.

What should Sunbury-on-Thames homeowners check first?

Some bungalow foundations need strengthening before a storey can be added.
Neighbours’ light and privacy are the main planning tests.

What are the steps?

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.
Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
Construction and completion. One site lead co-ordinates every trade through to the building control certificate.

Your questions answered

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.

How long does it take?

About 12 to 24 weeks on site.

How do I get a price for bungalow and upward extensions in Sunbury-on-Thames?

Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.

Bungalow and upward extensions near Sunbury-on-Thames

Learn more about bungalow and upward extensions, or see every project we cover in Sunbury-on-Thames.