✓ Verified Google reviews·✓ Reviewed regularly·✓ Updated 25 May 2026
Written by Mark Reid,
Trades Editor ·Verified 25 May 2026
Crawley's mix of post-war housing estates, Victorian terraces in the town centre, and modern developments around Broadfield and Langley Green creates unique challenges for builders. The clay soil common across much of the area affects foundation work, whilst many 1960s properties need specialist knowledge for cavity wall insulation and roof repairs. Local builders understand these quirks and work within Crawley Borough Council's planning requirements.
These builders made the list through careful checks of their Google ratings, review patterns, and trading history. We've verified they maintain active business registrations and hold relevant insurance cover. Each has demonstrated consistent work quality through customer feedback spanning different project types, from small repairs to major extensions.
Before hiring any builder, ask to see recent work photos and contact previous customers directly. Check their public liability insurance is current and covers your project value. Always get written quotes from at least three contractors, breaking down materials and labour costs separately. Don't pay large sums upfront, and verify they're registered for VAT if your project exceeds £2,000.
How We Select & Rate The Best Builders in Crawley
Our selection process examines Google ratings and review volume patterns over time, verifying active trading status through company registration checks. We confirm insurance credentials and relevant trade certifications where applicable. This directory provides starting points for research, not endorsements. Always conduct your own due diligence, obtain multiple quotes, and verify credentials independently before hiring any contractor.
Hasi Builders provides construction and building services throughout Crawley and the surrounding RH10 area. The company maintains a strong reputation with customers, earning 4.9 out of 5 stars from 27 verified Google reviews. Based in Grove Court, they offer professional building solutions for residential and commercial projects in the local community.
Transparency notice: Recommended (#1) and Featured (positions 2-5) listings may be paid placements. All other rankings are determined by a combined score drawn from Google ratings, review counts, and reputation signals gathered from multiple independent online sources. How we verify →
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Day rates for skilled builders range from £180-£280 daily, whilst larger projects vary widely. Single-storey extensions typically cost £15,000-£25,000, loft conversions £20,000-£35,000, and full house renovations £40,000-£80,000. Location affects prices, with work in Three Bridges or Northgate often costing more than outlying areas. Material costs, access difficulties, and project complexity drive variation. Getting three detailed quotes helps establish realistic budgets.
Do I need planning permission for building work in Crawley?
Most extensions, loft conversions, and structural changes need planning permission from Crawley Borough Council. Permitted development rights allow some small extensions and outbuildings without applications, but rules are strict. Your builder should advise on requirements, though you'll need to submit applications yourself or hire a planning consultant. Building regulations approval is separate and nearly always required for structural work.
How long do typical building projects take in Crawley?
Single-storey extensions usually take 8-12 weeks once started, whilst loft conversions need 4-6 weeks. Full house renovations can run 3-6 months depending on scope. Weather delays are common during winter months, and material delivery times affect schedules. Good builders provide realistic timelines upfront and communicate delays promptly. Factor in extra time for planning permission, which takes 8 weeks minimum.
What insurance should builders have in Crawley?
Public liability insurance of at least £2 million is essential, covering damage to your property or injury to others. Employer's liability insurance is required if they employ staff. Some builders carry professional indemnity insurance for design work. Always ask to see current certificates before work starts. Your home insurance should also cover building work, so inform your provider about major projects.
Can builders help with building regulations in Crawley?
Experienced builders understand building regulations requirements and often work with approved inspectors. They'll advise what needs approval and coordinate inspections during construction. However, you're responsible for ensuring compliance as the property owner. Some builders can submit applications on your behalf, whilst others prefer you handle paperwork directly with Crawley Borough Council's building control team.
How do I verify a builder's credentials and reputation?
Check their business registration on Companies House and verify insurance certificates with providers directly. Read Google reviews carefully, looking for patterns in complaints or praise. Ask for references from recent customers and visit completed projects if possible. Confirm they're registered for VAT if required, and check any trade association memberships. Trust your instincts during initial meetings about their professionalism and communication style.
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