A garage conversion turns an integral or attached garage into a warm, habitable room by insulating the floor, walls and ceiling, replacing the garage door with a wall and window, and adding heating, lighting and finishes.
Anyone planning a garage conversion in Thatcham wants three things: a clear price, a realistic timetable and a tidy job. We publish a guide of £13,500–£31,500 including VAT for the South East up front, explain that work normally takes 2–6 weeks on site, and confirm both in writing after a free survey of your property.
- Guide price
- £13,500–£31,500 inc VAT
- Time on site
- 2–6 weeks on site
- Postcodes
- RG19
- Planning rules
- England
- Local area
- West Berkshire
- Survey
- Free, with a written quote
What should you budget for a garage conversion in Thatcham?
Use the table to gauge the cost of a garage conversion in Thatcham before we visit. Figures include VAT and are scaled for the South East, coming out about 12% above the national guide, which gives £13,500–£31,500 overall. After a free survey, you receive a fixed written price.
| Type of job | What it usually involves | Guide in Thatcham |
|---|---|---|
| Integral single garage | A garage within the house footprint, with sound walls and a roof already in place. | £11,000–£20,000 |
| Attached single garage | A garage beside the house that may need roof, wall or floor upgrades. | £15,500–£28,000 |
| Double or detached garage | A larger or separate building, often with a shower room or kitchenette. | £24,500–£50,000 |
What moves the price up or down:
- Garage type: integral, attached or detached
- Whether a shower room or kitchenette is included
- Heating method and ventilation for the new room
- Window and door choices and the level of finishes
Scope of the work
- Infilling the garage door opening with insulated wall and new window
- Foundation checks under the door opening and footings where needed
- Damp-proof membrane, insulated floor and screed or raised timber floor
- Insulated walls and ceiling built to building regulations
- Plastering, skirting and decoration-ready finish
- Building control inspections and completion certificate
Local housing and a garage conversion
Reading's Victorian terraces often show the town's patterned red and silver-grey brickwork, while Windsor, Maidenhead and Newbury mix Georgian, Victorian and Edwardian houses. Bracknell grew as a post-war new town with planned estates, Slough has a great deal of interwar and post-war housing, and newer developments sit on the edge of most towns.
Much of the Thames Valley is low-lying, so flood risk and clay ground near the river can influence foundations and drainage for extensions.
That variety is why a guide price for a garage conversion in Thatcham is only a starting point; the survey shows what your particular property needs.
Permissions for a garage conversion in Thatcham
England, Wales, Scotland and Northern Ireland each handle planning a little differently. Thatcham comes under England, covered below, and we raise any questions with the council before your quote is finalised.
In England, converting an attached or integral garage into a room usually needs no planning permission, unless a planning condition on your estate has removed permitted development rights (common on newer houses). Changing the garage door to a wall and window is generally fine.
Building Regulations approval is needed: foundations for the infill wall, a damp-proof course, insulation, ventilation and fire safety.
Rules change and every property is different, so we check the planning history and constraints for your address before we quote.
The four stages
We look at the job
A free survey comes first. It gives us what we need to price a garage conversion properly, including dimensions, existing materials and access for deliveries, and gives you the chance to ask anything you like.
Written quote
We turn the survey notes into a written quote. The price is fixed for the specification we agree, and the document sets out materials, scope and payment stages in plain language.
Dates and permissions
Once you accept, we agree start dates, order materials and deal with any planning, building control or neighbour notices the job needs. You'll know who is coming and when before work begins.
Finish and handover
On site, the agreed plan is followed and any change is put in writing first. At completion we do a final clean, go through the snagging list with you and leave you with the relevant documents.
What you can expect from us
Frequently asked questions
Do I need planning permission in Thatcham?
It depends on the work, the size of the project, your property type and whether the building is listed or in a conservation area. Thatcham is in England, so England's rules apply. Many smaller jobs need no planning application, but some still need building control approval. We check what applies to your address before quoting.
Do you cover Newbury, Basingstoke and Reading?
Yes. As well as Thatcham, we cover Newbury, Basingstoke and Reading and the rest of Berkshire. Our coverage is UK-wide, so the process is the same wherever you are: a free site survey, a quote in writing that fixes the price for the agreed scope, and one point of contact while the work is planned and carried out.
Will I need building regulations approval?
A garage conversion needs building regulations approval because the space becomes a habitable room. Building control checks that the new wall in the door opening has proper foundations, that the floor has a damp-proof membrane and insulation, and that walls and ceiling meet insulation standards. Ventilation, fire safety and escape routes are also checked. In Scotland a building warrant is normally needed before work starts.
Will the new room be warm enough?
A converted garage can be as warm as any other room in the house, provided the floor, walls and ceiling are insulated to current standards. Garages are usually built with single-skin walls and no insulation, so this work matters. Heating can come from a new radiator on your existing system, underfloor heating or an electric heater, depending on your boiler capacity. We advise on the most suitable option.
Does the floor need raising?
Garage floors are usually lower than the house floor and slope towards the door for drainage. Most conversions raise the floor with a damp-proof membrane, insulation and either a screed or a timber floor, so it lines up with the house and removes the step. The final level depends on ceiling height and the door into the house. We measure both during the survey.
Near Thatcham
Addresses in RG19 are all covered for Thatcham, along with Newbury, Basingstoke and Reading close by. Give us your postcode when you get in touch and we will confirm the details.