Garage conversions done properly: full insulation, Part P electrics, structural checks and a finish that matches the rest of your home. We handle every trade in-house, from floor screed to final decoration.
Thin insulation tacked to the walls, a couple of sockets and a fresh coat of paint. That’s what many “garage conversions” amount to, and the result is a cold, damp room you can’t comfortably use in winter. We do it properly: full cavity wall insulation, floor insulation and screed to bring it level, Part P certified electrics, and ventilation that stops condensation building up behind the walls.
A properly converted garage is a warm, usable room twelve months a year. We handle every trade in-house, insulation, electrics, plumbing if you’re adding a toilet or utility, plastering and flooring, so nothing gets cut short to save a subcontractor’s time.
We also check the structure first: lintel over the garage door opening, wall ties, roof condition. If something needs sorting, we’ll tell you before we quote, not halfway through the job.
The finish and specification depends on how you want to use the room. We’ll advise on insulation, floor levels and services at the site visit.
The most popular conversion since 2020. Good insulation, plenty of sockets, data cabling if needed, and a finish that’s professional enough to work in all year round.
A separate space away from the main house, ideal for children or teenagers. Hard-wearing flooring, good lighting and heating, and often a WC or kitchenette if the garage is large enough.
A self-contained living space with bedroom, en-suite and small kitchen, perfect for elderly relatives or grown-up children. Requires planning permission in most cases; we’ll advise.
Move the washing machine and tumble dryer out of the kitchen and reclaim the space, then use the remaining garage footprint as a boot room, extra storage or extended living area.
A proper garage conversion isn’t just insulation and plasterboard. Here’s everything we carry out in-house on a full conversion.
We handle the Building Control application and all inspections throughout the build. You’ll receive a completion certificate at the end, important if you ever sell the property.
Four clear stages, no surprises. Here’s what to expect when you work with GSM on a garage conversion.
Gaz assesses the current structure, floor level, ceiling height, wall condition, roof, and your plans for the space. You’ll get an honest steer on what’s achievable and what it’ll cost before we go any further.
A full itemised quote broken down by trade, with no vague lump sums and no hidden upgrades. We’ll flag any structural issues found at the survey so you’re not surprised mid-build.
Once you approve, we agree a start date and hand you a build programme. Building Control is notified before any work begins. You’ll know exactly what’s happening and when.
Our team works through every trade in the right sequence: structure, services, plaster, finish. Gaz checks quality throughout and we hand over a fully signed-off room ready to use.
Full garage conversion to home office/den; bespoke media wall; all trades managed, structural, plumbing, electrics, plastering, decorating, joinery
Read case study →Garage conversion to office/gym; WC and shower room; structural works, plastering, tiling, bespoke window
Read case study →Gaz and his team have just completed a conversion of our garage into a home office/den. From our initial conversation throughout the project Gaz was great to deal with. I asked him to take care of the whole project — up to and including decorating.…
Gaz and his team recently converted my detached garage to create an office/gym space with loo and shower. It's always tricky to choose a builder, but I'm so glad I decided to go with GSM. Gaz himself was excellent. He kept me continually updated, letting…
We needed to rearrange the ground floor of our new house to better suit our growing family. GSM construction took down a load bearing wall to create an open plan living family kitchen, and built up a partition wall to separate off a separate snug.…
Gaz and team are all you need for all building works in your home! In my house they worked on areas such as a steel beam installation, tiling, plastering and joinery. Competitively priced, professional, tidy and friendly. Special mention to Matt, a true craftsman and…
We’re based in Chesterfield and carry out garage conversion work across the town and surrounding areas. Close enough to visit regularly, respond quickly, and build relationships with clients across the area.
The 1970s and 1980s housing estates across Loundsley Green, Newbold and Walton have a high proportion of integral and attached garages, many barely used for vehicles and ideal for conversion. We’ve done plenty of this work across the town.
Post-COVID demand for home offices has been strong across Dronfield and the surrounding villages. Many garages in this area are attached to 1980s and 1990s detached properties with good ceiling height and accessible services, straightforward to convert properly.
Strong demand for practical conversions across this area: utility rooms, extra living space and budget-friendly annexe projects for extended families. We approach each project based on what makes sense for the property, not what maximises the quote.
We travel across the wider Derbyshire and South Yorkshire area for conversion projects. If you have a garage you’d like to convert, get in touch. Chances are we’ve worked in your area already.
Not sure if we cover your area? Call Gaz directly on 07727 263707. We’ll give you a straight answer.
The most common questions homeowners ask us before starting a garage conversion in Chesterfield and Derbyshire.
Most garage conversions pull in one or more of these trades, and we carry them all in-house.
Need more space than the garage footprint allows? A single-storey rear extension can be combined with a garage conversion for a major space gain in one project.
View service →Full skim coat and drylining throughout the converted space, finished flat, ready to decorate. No subcontractors, no delays between trades.
View service →LVT, engineered hardwood, carpet or tile, we supply and fit all flooring types in-house to match the standard of the rest of the home.
View service →Internal doors, skirting, fitted storage and shelving, all matched to the existing house style and fitted by our in-house joiners.
View service →Gaz will come out, take a proper look at the garage and tell you honestly what’s possible and what it’ll cost, before any money changes hands. If there are any structural issues to flag, we’ll tell you upfront. We cover Chesterfield, Sheffield, Dronfield and the wider Derbyshire area.
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