✓ Verified Google reviews·✓ Reviewed regularly·✓ Updated 2 September 2026
Written by Mark Reid,
Trades Editor ·Verified 2 September 2026
Basildon's a mixed bag when it comes to housing stock, and that shapes the kind of building work in demand here. You've got the post-war new town estates around Fryerns and Barstable with their concrete-framed properties needing specialist knowledge for extensions, plus older cottages and farmhouses out towards Ramsden Bellhouse and Nevendon that come with solid brick walls and the odd damp issue. Then there's the newer developments around Wickford and Laindon, where loft conversions and rear extensions are the more common ask. A builder who knows the difference between working on a 1960s prefab and a Victorian terrace will save you a headache further down the line, so local experience counts for a lot here.
The businesses listed on this page come from public business listings, and we've ranked them using review rating and review count, with a small boost given to those showing a working website and phone number. We also check each business's homepage to confirm building work is genuinely their main trade, which stops plumbers, electricians or general handymen cluttering up a builders list. Any listing flagged as permanently closed gets removed automatically, so you're not wasting time ringing a number that's gone dead. Where you spot a Trust Verified badge, that business has gone further and passed our full verification, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. Our How We Verify page sets out exactly what that involves. For businesses without the badge, those checks haven't been done by us, so it's worth doing your own homework before signing anything.
Before you commit to a builder, ask to see proof of their public liability insurance and check whether they're registered with a trade body such as the Federation of Master Builders. For anything structural, like removing a wall or building an extension, confirm they'll handle building control sign-off, and ask whether the quote includes skip hire, scaffolding and waste disposal, because these get left off cheaper quotes surprisingly often. Get at least two or three written quotes rather than verbal estimates, and ask for photos of recent jobs in Basildon or nearby, ideally something similar in scale to your own project. A written contract covering start dates, payment stages and what happens if things overrun will save arguments later.
How We Select & Rate The Best Builders in Basildon
Rankings are based on review rating and review count pulled from public business listings, with a small lift given to businesses showing a working website and phone number. We check each business's homepage to confirm building work is what they primarily offer, keeping unrelated trades off the page. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have additionally passed our full verification, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information, detailed in full on our How We Verify page. Other businesses haven't been independently verified by us, and appearing on this page isn't an endorsement. Always carry out 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 →
Fit-out and internal partitioning work makes up the core of this Basildon builder's output, covering stud walls, suspended ceilings and office reconfigurations for commercial clients. Partitioning Services Limited has built a 5-star record across 25 Google reviews, reflecting consistency on jobs that need precise, tidy finishing rather than general building work.
A typical enquiry starts with a loft full of boxes and a homeowner wondering if it could become a spare room or office instead. The Attic Guys, working across Basildon, handle the structural side of these conversions, from floor strengthening to staircases and insulation. Thirteen reviews on Google put them at a full 5 rating.
Rated 5.0 on Google across eight reviews, Superior Group Refurbishments is a building firm serving Basildon and the surrounding area. The company covers general construction and refurbishment work, with its consistent full-star rating pointing to a reliable finish for local clients. SS15 6DU places it well for projects across south Essex.
Frametech Essex Ltd is a building contractor based in Basildon, covering construction and structural work across the local area. With a Google rating of 4.5 from early reviewers, the company has established a steady reputation in the SS15 postcode and surrounding Essex communities. Their work spans residential and commercial projects typical of a general builder operating at this scale.
A building contractor serving Basildon and the surrounding area, Jennings Renovations LTD covers renovation and general construction work for residential properties. The company holds a perfect 5.0 rating on Google, drawn from verified customer reviews. Jennings Renovations operates as a limited company, providing a formal structure for clients commissioning building projects in the SS16 area.
Period properties around Basildon make up much of the workload for Barley Design & Build, with extensions and renovations forming the bulk of enquiries. Older housing stock often brings structural quirks, and the firm's projects tend to involve reconfiguring layouts rather than simple cosmetic updates. Work is generally organised from initial design through to completion.
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 of around 20 square metres typically runs from £22,000 to £38,000 depending on finish, while a loft conversion with a dormer often sits between £30,000 and £48,000. Smaller jobs like a garden wall or brickwork repairs might cost £600 to £2,000. Prices swing a lot depending on access, whether structural steels are needed, and current material costs, so get two or three quotes before deciding rather than going with the first one that lands.
Do I need planning permission for an extension in Basildon?
Many single-storey rear extensions fall under permitted development rights, but this depends on the size, your property type and whether you're in a conservation area. Basildon Council's planning department can confirm whether you need full permission or just a Lawful Development Certificate. A decent builder should flag this early and can often point you towards a local architect or planning consultant if it's needed.
How long does a loft conversion or extension take?
A straightforward loft conversion usually takes four to six weeks once building control approval is sorted. A single-storey extension often runs eight to twelve weeks, longer if there's groundwork, drainage rerouting or bad weather to contend with. Ask your builder for a realistic timeline in writing, including what happens to that schedule if unexpected issues turn up once walls are opened.
What's the difference between building regulations and planning permission?
Planning permission is about whether you're allowed to build something at all, based on size, position and impact on neighbours. Building regulations are separate and cover the technical side, things like structural safety, insulation, fire escape routes and electrics. Most extension work needs building regulations sign-off even if planning permission isn't required, so check your builder is arranging inspections at the right stages rather than leaving it until the end.
Should I pay a deposit before work starts?
A modest deposit, often 10 to 15 percent, is fairly standard practice to cover materials and scheduling. Be wary of any builder asking for a large upfront sum before any work has started, that's a common warning sign. Agree a payment schedule tied to project stages instead, such as completion of groundwork, first fix, and final finish, so you're not left exposed if something goes wrong partway through.
How do I choose between builders in Basildon?
Start by checking recent reviews for jobs similar to yours, an extension is a different skill set to a garden wall or a full renovation. Ask to see their public liability insurance certificate and confirm membership of a trade body like the Federation of Master Builders or TrustMark. Request photos or an address of a recent local job so you can view the standard of finish yourself. Always get written quotes from at least two or three builders, and check whether VAT is included, because a verbal price can shift once work begins.
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