Written by Mark Reid,
Trades Editor ·Verified 23 September 2026
Aylesbury's a mix of old and new, which throws up different jobs for builders across the town. You've got the Victorian terraces around Walton and Bierton Road that often need underpinning or damp work sorted, the mock-Tudor semis in Fairford Leys and Watermead needing extensions and loft conversions, and the newer estates towards Kingsbrook and Berryfields where snagging work and garden rooms are more the norm. Clay subsoil in parts of the district means some properties have had subsidence issues over the years, so a builder who knows the local ground conditions is worth having. Whether it's a kitchen extension in Prestwood or a full renovation on one of the older cottages out towards Stone, the right builder needs to understand what the local housing stock throws at them.
The businesses featured here are pulled from public business listings and ranked mainly on review rating and review count, with a small boost given to those with a working website and phone number listed. We read through each business's homepage to check that building work is genuinely what they do day to day, which stops plumbers, electricians or general handymen cluttering up a page meant for builders. Any listing that's flagged as permanently closed gets removed automatically, so you're not wasting time ringing a number that no longer connects. Where you spot a Trust Verified badge next to a business, that firm has gone through our fuller verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. Full details of what that involves are on our How We Verify page. Businesses without the badge haven't been through that process with us, so it's down to you to check qualifications, insurance and references before signing anything.
Before hiring anyone, ask to see their public liability insurance certificate and, if the job involves structural changes, check whether building regulations approval or planning permission is needed (Aylesbury Vale District Council deals with both). For anything involving gas or a boiler swap, confirm the person is Gas Safe registered, not just the building firm. Get at least two or three written quotes rather than verbal estimates, since prices for something like a single-storey rear extension can range from £25,000 to £45,000 depending on size and finish, and that spread catches people out if they only ask one firm. It's also worth asking for photos or addresses of recent, similar jobs nearby, so you can see the standard of work before committing.
How We Select & Rate The Best Builders in Aylesbury
Businesses are ranked using public business listings, weighted mainly by review rating and review count, with a small lift given to those showing a working website and phone number. We check each business's homepage to confirm building work is what they primarily offer, filtering out unrelated trades. Listings flagged as permanently closed are removed automatically. Businesses displaying a Trust Verified badge have gone further, passing our full verification of trade qualifications, public liability insurance, trading history and customer review history, plus registered company checks (see our How We Verify page for details). Other businesses listed haven't been independently verified by us, and their inclusion 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 →
Families across Aylesbury extending or renovating period homes make up much of Foster Construction Ltd's workload, covering everything from groundwork to finishing trades. The firm holds a 4.4 rating from seven reviews, reflecting steady client satisfaction on smaller residential projects rather than large-scale developments.
Rated 5 stars by local clients, R.O Allum & Sons is a building firm operating in and around Aylesbury. The family-run business covers general building work across the HP23 area, with a consistent review record that reflects reliable site standards. Details of their services are available at roallum-builders.co.uk.
Families across Aylesbury looking to replace a dated kitchen turn to Lake Twins Construction Ltd for the fitting work involved, from removing old units to installing worktops and cabinetry. Thirteen reviews have left the firm with a five-star rating, reflecting consistent standards across household projects in the HP20 area.
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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It depends heavily on the job. Small repair work or patching up brickwork might run £150 to £400 a day for labour. A loft conversion in a typical Aylesbury semi tends to land between £30,000 and £50,000 depending on whether it's a simple rooflight conversion or a full dormer. Kitchen extensions usually sit between £1,800 and £2,500 per square metre once you include fittings. Always get two or three quotes, since prices between local firms can vary by several thousand pounds for the same spec.
Do I need planning permission for an extension in Aylesbury?
Many single-storey rear extensions fall under permitted development rights, so you may not need full planning permission, but there are limits on size, height and proximity to boundaries. Aylesbury Vale District Council handles applications and can confirm whether your specific plans need consent. It's worth checking before work starts, as unauthorised builds can cause problems when you come to sell.
How long does a typical extension or loft conversion take?
A single-storey extension usually takes eight to twelve weeks from groundworks to finish, weather permitting. Loft conversions tend to run six to ten weeks depending on whether structural steels are needed. Delays often come from waiting on materials or building control sign-off at key stages, so build some slack into your timeline rather than booking removal vans on a tight deadline.
What's the difference between a builder and a general contractor for a big project?
A builder might handle the whole job themselves or with a small regular team, which suits smaller renovations. For bigger projects like a two-storey extension with new plumbing, electrics and roofing, you may want a main contractor who manages subcontractors like electricians and plumbers on your behalf. Ask upfront how the firm organises trades on larger jobs, so you know who's accountable if something goes wrong.
Should I pay a deposit before work starts?
A reasonable deposit for materials is normal, often 10 to 25 percent of the total job cost, but be wary of anyone asking for the full amount upfront. Stagger payments against agreed milestones, such as after groundworks, after first fix, and on completion. Get this in writing as part of a contract before any money changes hands.
How do I check a builder is right for my job before booking?
Ask to see their public liability insurance certificate and check it's current. Request references or addresses of recent local jobs you can look at, ideally similar in scope to yours. Check whether they're registered with a trade body like the Federation of Master Builders, and search their business name plus 'reviews' to see wider feedback beyond what's on one site. For anything structural, confirm they'll handle or coordinate building control sign-off, and get a written quote breaking down labour, materials and timescale before agreeing to anything.
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