All Well Property Services provides professional garage conversions across South East London. I price every project individually after a free site visit, so you get a clear written quote with a week-by-week programme rather than a calculator estimate. All projects include a fixed-price contract, single project manager, and full Building Control sign-off. Call 020 3920 9617 for a free consultation.
What We Offer
Your garage is wasted space. We convert it into a home office, extra bedroom, playroom, or self-contained annexe — fully insulated, heated, and signed off to Building Regulations. It won't feel like a garage when we're done.
- ✓Single and double garage conversions
- ✓Home office conversions
- ✓Additional bedroom or playroom
- ✓Self-contained annexe builds
- ✓Full insulation and damp proofing
- ✓Heating and electrical installation
- ✓Flooring and plastering
- ✓Building Regulations sign-off
How I price garage conversions
I quote every job after a free site visit. The price covers materials, labour and a realistic programme, all fixed in writing before we start. No hidden costs, no mid-job surprises.
Book a free site visitWhat Affects the Cost?
- •Single vs double garage
- •Intended use (bedroom vs self-contained annexe)
- •Insulation and damp proofing requirements
- •Plumbing (en-suite or kitchenette adds cost)
- •Flooring specification and underfloor heating
Garage conversion specialists in South London
If you have searched for garage conversion near me and landed here, you have found a team that does this work week in, week out. We are garage conversion builders working across SE and SW London since 2020, and I run every project myself, from the first site visit to handover. Most of our jobs are in Bromley, Beckenham, Anerley, Penge, Sydenham, Catford and Croydon, where the 1930s to 1950s housing stock has integral or attached garages now used for storing junk rather than cars. We do a smaller number in Wandsworth, Putney and Tooting, where some of the older semis still have garages worth converting.
Why people use garage conversion specialists
A garage was never built to be lived in. The floor sits lower than the house, the walls have no insulation, and damp comes up through a slab with no membrane. Garage conversion specialists deal with all of that as a matter of course, so the finished room reads as part of the house rather than a patched-up garage with a sofa in it.
How long the work takes
Standard build time runs 4 to 8 weeks, and most of our projects finish inside the schedule we agree at the start. A single garage with no plumbing sits at the quick end. A double garage with a shower room or kitchenette takes longer because of the extra first-fix and Building Control inspections.
What we convert garages into
The right layout depends on the room you are short of and where the garage sits in the house. Below are the conversions we do most often. Every one is fully insulated, heated and signed off to Building Regulations, so it holds its temperature and passes a survey.
Garage to bedroom
To convert a garage to a bedroom we raise and insulate the floor, line the walls, fit a Building Regs compliant window for light and escape, and add interlinked smoke detection. Where the garage opens onto the main house we fit an FD30 fire-rated door, which Part B requires once a garage becomes a sleeping room.
Garage to living space
When you convert a garage to living space the priority is getting the floor level flush with the existing house and the ceiling height right, so the room flows rather than feeling like a step-down add-on. We replace the garage door with an insulated wall and a window or doors, then heat, plaster and decorate to match the rooms either side.
Garage to home office
A garage office conversion gives you a quiet room with its own door, away from the rest of the house. We run dedicated power and data circuits and insulate it to stay warm in winter without heating the whole house. We can also fit a separate external door if you want clients or deliveries to come straight in.
Garage to annexe or granny annexe
A garage to annexe build is a self-contained space with its own shower room and kitchenette, suitable for an elderly relative, a grown-up child or guest accommodation. A garage to annexe or granny annexe carries extra Building Regulations requirements, which I cover in the delivery section below. We coordinate all of it under one contract.
Double garage conversions
A double garage conversion gives you enough floor area for two rooms, an open-plan space, or a room with its own bathroom built in. The wider span sometimes needs a structural check on the existing lintel, or a new beam where the door opening is closed up. We have a chartered structural engineer handle the calculations where the load demands it.
Garage to playroom
A garage conversion playroom keeps the mess and noise in one place while staying part of the house. We use hard-wearing flooring that takes spills and toys, insulate so it stays warm at floor level where children sit, and fit plenty of sockets and good lighting.
Garage with a bathroom or kitchenette
Adding a garage conversion bathroom or kitchenette is what turns a spare room into something far more useful. It means new drainage, water supply and Part F mechanical extract, plus Gas Safe work if there is a gas appliance. That adds time and inspections, but we handle the lot in one go.
Building Regulations and planning for a garage conversion
Building Regulations sign-off is mandatory for any garage conversion to habitable use, whether or not you need planning. I check the planning position at the survey and manage the whole Building Control process, from the application to the final completion certificate. Most conversions are permitted development and need no planning application at all.
What Building Regulations cover
The work has to meet insulation (Part L: U-value 0.18 W/m²K for walls and floors in habitable rooms), ventilation (Part F: trickle vents on windows, mechanical extract on bathrooms or kitchenettes), fire safety (Part B: fire-rated doors and protected escape routes where the garage becomes a bedroom), structure (Part A: foundation assessment and load calculations) and electrics (BS 7671: NICEIC certified circuits). Floor levels typically need raising 150 to 200mm with insulated screed, usually 75mm Kingspan PIR plus 65 to 70mm liquid screed, to match the existing house floor and hit the U-value. The garage door is replaced with a new insulated wall and window.
Planning permission and permitted development
Most conversions are permitted development and need no planning application. Properties built since the 1980s often carry a planning condition requiring the garage to be kept for parking, so we check the planning history on the local authority portal at the survey and apply for variation of condition where it is needed. We carry NICEIC for electrical certification, Gas Safe for any kitchenette or shower-room gas connection, CHAS for site safety, and Public Liability insurance to £5 million.
Insulation and damp proofing
A garage slab usually has no damp-proof membrane, which is why the floor feels cold and smells musty. We lay a new membrane and floor insulation as standard, then insulate the walls behind a stud line so the room holds heat. Get the insulation and damp proofing wrong and you end up with condensation and mould, so this is the part I never let anyone cut corners on.
How we deliver a garage conversion
One project manager runs the conversion from survey to handover, so you always know who to call. The standard build runs 4 to 8 weeks: week 1 insulation and damp proofing, weeks 2 to 3 first-fix electrics, plumbing and plasterboard, weeks 4 to 5 second fix and finishes, then weeks 6 to 8 painting, decorating and snagging.
What the fixed price covers
Fixed-price contracts cover insulation, structural assessment, replacement of the garage door with an insulated wall and window, electrics, any plumbing for a kitchenette or shower, flooring, plastering, decoration and Building Control fees. The price does not change unless the specification does. We operate from Unit 1 Limes Avenue, Anerley, London SE20 8QR, Companies House number 12721034, with 57 verified Google reviews averaging 4.5 out of 5 stars.
Self-contained annexe conversions
For a self-contained annexe we coordinate the extra Building Regulations requirements: a separate fire escape, ventilation rates for habitable rooms, and sound insulation between the annexe and the main house. The finished annexe meets habitable standards and works as guest accommodation, a space for an elderly relative, or informal home-office use.
Free tools for planning your project
No email required. Get instant estimates and planning answers before you book a consultation.
Garage Conversion Calculator
Estimate the cost of converting your garage into living space. Factor in garage size, intended use, plumbing requirements, and your borough for a personalised cost breakdown.
Best Month
See historic rainfall and temperature for your postcode every month, plus the best window for external work. Live data from the Open-Meteo archive (Met Office and ECMWF).
Listed Check
Check whether your property is a listed building or sits inside a conservation area, and what that means for renovation work. Live data from Planning.data.gov.uk and Historic England.
Planning Risk
Traffic-light check of every planning restriction at your postcode: listed buildings, conservation areas, Article 4 directions, Tree Preservation Orders, flood zones. Live data from Planning.data.gov.uk.
Recent Garage Conversions Projects
Garage Conversions across South East London
What Our Customers Say
“So happy with the work done by Les and Richard!! We bought a house that needed new paint, cracks filled, a new bathroom fan and some mold removal and they did it all. The quality of the work is phenomenal; it looks like a brand new house. We’ll definitely be hiring them for our future projects!”
Brenna Bodine
3 months ago
“So happy with Joel’s work in refurbishing my flat. There was no job too big or small for him and all done to a high standard. I won’t hesitate to use him again!”
Callum Stone
4 months ago
“Joel is 100% reliable, patient, skillful and easy to have around. He repainted my hall, landing and stairs over two floors and made good a disastrous previous plastering problem. I am thrilled with the result and recommend him extremely highly!”
Mel Carter
8 months ago
Accredited & Certified
Frequently Asked Questions
- Do I need planning permission to convert my garage?
- Most garage conversions fall under permitted development rights and do not require a formal planning application, provided you are not changing the overall footprint or height of the building and the use remains ancillary to the main dwelling. The conversion must still meet Building Regulations — which is a separate process from planning permission and covers structural integrity, insulation, ventilation, fire safety, and electrics. If your property is a listed building, in a conservation area, or if the original planning consent included a condition that the garage must be retained for vehicle parking (common on estates built after 1970), you will need approval before converting. Some properties also have restrictive covenants in the title deeds limiting garage use — your solicitor or Land Registry title documents will confirm this. We check all of these factors during the free site visit and advise you before any commitment, including reviewing any relevant planning history on your local council's online portal.
- Will a garage conversion need to meet Building Regulations?
- Yes, every garage conversion must comply with Building Regulations (Approved Documents A through P) regardless of whether planning permission is needed. The key areas covered are structural integrity (the garage floor and walls must support habitable use — concrete floors often need levelling or a new screed), thermal insulation (walls must achieve a U-value of 0.3 W/m²K or better, typically requiring 75-100mm insulated stud walls), ventilation (adequate natural or mechanical ventilation for the intended use, with trickle vents in new windows), fire safety (FD30 fire-rated doors between the conversion and the main house, interlinked smoke detectors, and safe escape routes), damp proofing (a new damp-proof membrane is usually required in the floor, often combined with 50-75mm floor insulation), and electrical safety (all new wiring must be Part P compliant and NICEIC certified). We manage the entire Building Regulations process, including the initial application to your local authority, interim inspections at key stages, and the final completion certificate.
- Does a garage conversion add value to my home?
- A well-finished garage conversion typically adds 10-20% to the value of your property, making it one of the most cost-effective home improvements available in South London. With single garage conversions starting from around £15,000, the return on investment is often higher than a loft conversion or extension when measured as a percentage of the build cost. According to Rightmove and Zoopla data, an additional habitable room can add £40,000-£60,000 to a property in boroughs like Bromley, Lewisham, and Bexley. The actual value added depends on what you convert it into — an extra bedroom or dedicated home office tends to add more value than a utility room or general storage space. The key to maximising value is ensuring the conversion looks and feels like a proper room, not a converted garage. That means level flooring, proper insulation meeting current Building Regulations, adequate ceiling height of at least 2.3 metres, and a finish that matches the rest of the house.
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