Garage conversions in Sunbury-on-Thames

Covering Sunbury-on-Thames

Our coverage around Sunbury-on-Thames (TW16, TW17) also includes Walton-on-Thames (1 miles to the south) and Hanworth.

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 goes into a garage conversion?

A garage conversion turns an attached, integral or detached garage into a habitable room by infilling the door opening, insulating the floor, walls and roof, and adding windows, heating and power. It is one of the quickest and cheapest ways to add a room.

Building control application
Heating, electrics and data points
Plastering, skirting and decoration-ready finish

What will a garage conversion cost?

Indicative costs for garage conversions. London and the South East usually sit towards the top of each range.

Garage conversions	Guide price incl. VAT
Single integral garage	£12,000 to £17,000
Single attached garage	£12,000 to £24,000
Single detached garage	£18,000 to £30,000
Double garage	£25,000 to £54,000

Planning and building rules 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.

An internal garage conversion is usually permitted development in England unless the house is listed, an Article 4 direction applies, or it is on an estate where the planning permission removed permitted development rights. We check the original permission for your house.

What can affect a garage conversion?

The garage floor is often lower than the house and needs raising.
A bedroom needs an escape window or a protected route out.

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.
We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.

Your questions answered

How much does a garage conversion cost?

A single integral garage usually costs about £12,000 to £17,000 including VAT. Detached and double garages cost more.

Can a garage become a bedroom?

Yes, with insulation, ventilation and an escape window or protected route out.

Do you work in Sunbury-on-Thames?

Yes. Sunbury-on-Thames is within our coverage for garage conversions, along with nearby Walton-on-Thames and Hanworth.

Also covering

Learn more about garage conversions, or see every project we cover in Sunbury-on-Thames.