Written by Mark Reid,
Trades Editor ·Verified 10 October 2026
Sutton's housing stock is a real mix, which keeps its builders busy with all sorts of work. You've got the 1930s semis around Cheam and Belmont with their bay windows and shallow foundations, the Victorian terraces closer to Sutton town centre that often need underpinning before an extension goes ahead, and newer estates near Rosehill where loft space and side-return extensions are the more common ask. Clay soil is fairly typical across the borough, which matters if you're planning groundworks or a rear extension, since it affects how footings need to be dug. Plenty of homeowners here are also dealing with conservation area restrictions in parts of Carshalton and Cheam village, so a builder who knows the local planning department's quirks can save you weeks of back and forth.
The businesses featured on this page are drawn from public business listings and ranked by their review rating and the number of reviews they've built up, with a modest boost for those showing a working website and contact number. We check each builder's homepage to confirm that building work, extensions, renovations and general construction are actually what they do day to day, which keeps roofers, electricians and other unrelated trades from cluttering up the list. Any listing flagged as permanently closed gets removed automatically. Where you spot a Trust Verified badge, that business has gone through our fuller verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company details. Our How We Verify page sets out exactly what that involves. For businesses without the badge, none of that has been independently checked by us, so it's worth doing that legwork yourself before signing anything.
Before you commit to a builder, ask to see proof of public liability insurance and, if the job involves gas or electrics, confirmation they'll use a registered subcontractor for that part. For anything structural, like removing a load-bearing wall or building a two-storey extension, check they're used to working with building control and can point you to previous jobs of a similar size. Get at least two or three written quotes rather than verbal estimates, and make sure each one breaks down materials, labour and any provisional sums separately. A written contract with a payment schedule tied to project stages protects you if things overrun, and it's far better than handing over large sums upfront.
How We Select & Rate The Best Builders in Sutton
Ranking is based on review rating and review count pulled from public business listings, with a small lift given to businesses that show a working website and phone number. We check each business's homepage to confirm building work is genuinely what they do, rather than a trade that's just been tagged in under builders. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have gone further, passing our full checks on qualifications, insurance, trading history, customer review history and registered company information; see our How We Verify page for details. Other businesses haven't been independently verified by us, and appearing here isn't an endorsement, so do your own checks before hiring.
Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →
Sutton and the surrounding area are served by MDT Fixing Group Ltd, a builders firm handling projects from extensions to renovations. Enquiries can be made through the company's website for further details on availability.
Ultimate Build Teams Ltd is a Sutton-based building contractor covering work at both residential and commercial scale, from new build construction and basement projects through to loft conversions and full house renovations. Its range takes in both ground-up building and the reworking of existing homes.
The South London Loft Conversions works as a building firm in Sutton, specialising in converting roof spaces into functional rooms rather than general house renovations. The company concentrates on this single trade, a specialised area of construction work.
Much of PB Builder Ltd's work in Sutton involves extensions and renovations to older, established houses, where existing structures need careful assessment before any new work begins. The firm handles both structural alterations and finishing trades, giving clients a single point of contact throughout.
Loft conversions, house extensions, and bespoke kitchen design and installation are among the core services offered by Skyworkers Building Company, covering residential renovation work across Sutton. Its work spans both interior and structural projects, from fitting new kitchens to adding extra living space.
STN Basements & Groundworks works mainly on older Sutton properties needing structural underpinning or basement conversions, alongside groundworks for extensions and new builds. The job types demand careful attention to drainage and foundations. Enquiries typically come from homeowners planning to add living space below ground rather than out or up.
Kitchen remodelling, bathroom remodelling, and structural repairs sit at the core of AT Line Construction Ltd's offer, alongside extensions, conversions, and cladding work across Sutton. Refurbishment projects of varying scale round out the scope of work the firm takes on.
House extensions, loft conversions, and full house refurbishments form the core offer at Art & Build, a design-and-build contractor based in Sutton. The company also carries out kitchen and bathroom installations alongside garden landscaping, handling projects from initial design through to completion.
General building and renovation work is carried out across Sutton by NK Home Renovation, covering extensions, refurbishments and structural alterations. Work is typically organised from initial planning through to completion for domestic clients.
Nex Gen Builder is a general building firm based in Sutton, covering construction and building work across the local area. Its website outlines a broad scope of building services, reflecting the range typical of a full-service contractor rather than a specialist trade.
Sutton Building Services takes on extensions and renovations to period properties around Sutton, where older brickwork and layouts need careful handling alongside more routine building work. Jobs range from structural alterations to full refurbishments.
RJK London Design and Build works as a builder in Sutton, covering projects from structural alterations to full renovations. The company combines design input with construction work, giving clients a single point of contact through both stages.
Families across Sutton looking to extend or renovate rather than move on turn to Harry & Son Building Contractors Ltd for the groundwork through to finishing touches. The firm has built a following through word of mouth. Work is scoped around each household's layout and budget rather than a standard package.
Sutton households needing structural or renovation work can call on GA Builds, a general building firm. Work is arranged directly through the company's own website rather than third-party listings.
General building work is carried out across Sutton by AG Home Improvements Ltd, covering renovations, extensions and smaller-scale project work for local households. The company operates on a local footing rather than at wider scale.
Much of CV Construction's work in Sutton involves extensions and renovations on older properties, where existing structures need careful assessment before any building begins. The firm also takes on smaller residential jobs across the town.
A kitchen extension that needs structural work, or a loft conversion requiring full sign-off, are typical projects for CJ Construction (Surrey) Ltd in Sutton. The firm handles building work from initial groundworks through to finishing touches.
Aitchison Development Construction Limited operates as a building firm based in Sutton, covering general construction and renovation work. Clients can approach ADCL for extensions, refurbishments and structural work.
Sutton and the surrounding area are served by Image Construction Ltd, a building firm handling extensions, renovations and general construction work. Its projects cover both home improvements and larger building jobs, from adding space to a property to updating existing rooms.
Loft conversions and extensions are the focus for R.L.E, working with households across Sutton. Work covers structural changes to add space rather than general repairs or maintenance.
Evoke Design & Build Ltd operates in Sutton as a principal contractor covering both residential and commercial development. The firm presents itself as a full-cycle operation, spanning initial design through to build completion, with facilities management also listed among its services.
JD Homes London Ltd is a building firm in Sutton, taking on general building work for local homeowners. Jobs are organised directly through its website, and it serves clients across Sutton and neighbouring districts.
General building maintenance and repair work is carried out across Sutton by Kastrati Building Maintenance LTD, covering everything from small repairs to larger renovation jobs. Enquiries can be made through its website for jobs of varying scale.
Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →
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A single-storey rear extension typically runs from around £22,000 to £45,000 depending on size and finish, while a loft conversion with dormer might sit between £35,000 and £55,000. Smaller jobs, like a bathroom refit or a garden wall, could be anywhere from £2,000 to £8,000. Costs shift a lot depending on whether you need groundworks for clay soil, structural steels, or planning permission for a conservation area. Always get two or three quotes so you can see where the pricing sits for your specific job.
Do I need planning permission for an extension in Sutton?
Many single-storey rear extensions fall under permitted development, but this depends on the size, your property type and whether you're in a conservation area like parts of Carshalton or Cheam village. Sutton Council's planning portal is the place to check, and a decent builder or architect will usually flag early on whether you'll need full permission or just a lawful development certificate.
How long does a loft conversion take?
Most straightforward loft conversions take between six and ten weeks once work starts on site, though this can stretch if you're adding a dormer or dealing with an older roof structure that needs extra bracing. Add on a few weeks at the start for scaffolding, skip permits and any structural engineer sign-off before building control approves the final work.
Should I use a builder registered with a trade body?
It's worth asking, though membership of bodies like the Federation of Master Builders isn't a legal requirement to trade. What matters more practically is checking their public liability insurance is current, asking for photos or addresses of recent similar jobs, and, if it's a bigger project, asking whether they've worked with your local building control team before.
What's the difference between a quote and an estimate?
A quote is a fixed price for agreed work, while an estimate is a rough figure that can change once the job's underway. For anything over a few thousand pounds, insist on a written quote with materials and labour itemised separately, plus a note of what happens if unexpected issues come up, like finding old drains or unstable brickwork once work starts.
How do I check a builder is right for my job before booking?
Ask to see photos of previous jobs similar in scale to yours, and if possible, get an address or two to look at in person. Check their public liability insurance is current and ask what happens if damage occurs during the work. Read through recent customer reviews yourself rather than relying on a star rating alone, and confirm in writing what's included in the price, what isn't, and the payment schedule before any work starts.
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