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Expert Construction Services in Cornwall
Cornwall Builders represents Arnell Construction & GA Wildish, combining decades of expertise in residential and commercial construction. Our team of skilled tradespeople delivers high-quality building services across Cornwall, specialising in house extensions, loft conversions, new builds, renovations, and driveway installations. With a focus on quality, affordability, and customer satisfaction, we manage projects from concept to completion, ensuring compliance with building regulations and industry standards.

Our in-house capabilities include planning assistance, architectural collaboration, and structural calculations, providing clients with a seamless experience. We prioritise clear communication, minimise disruption during projects, and use durable materials to ensure long-lasting results. Operating throughout Cornwall, we serve areas like St Austell, Truro, Falmouth, and beyond, offering competitive pricing without compromising on craftsmanship.
Services
House Extensions Loft Conversions New Builds Renovations Driveways Barn Conversions Patios Kitchen Refurbishment Roofing Services
Highlights and features
  • We have decades of experience in residential and commercial construction across Cornwall
  • Our in-house team handles all aspects from planning to completion
  • We guarantee high-quality workmanship and materials fit for purpose
  • We prioritise clear communication and minimal disruption during projects
  • We offer competitive pricing with no hidden fees
Associations and certifications
  • NHBC
  • FMB
What people say
Delighted with new kitchen Smooth project process Excellent communication Love new bathroom Highly recommend
Services
House Extensions
We specialise in creating bespoke house extensions that maximise living space while maintaining structural integrity. Our team handles single and two-storey extensions, including planning permissions and architectural collaborations. Using state-of-the-art insulation and durable materials, we ensure energy-efficient additions that enhance property value and meet modern living requirements.
Loft Conversions
Our loft conversion service transforms unused attic space into functional living areas. We conduct structural assessments, manage building regulations compliance, and incorporate dormer windows where needed. With expertise in traditional and modern roof trusses, we deliver safe, code-compliant conversions that typically increase property value by up to 20% while preserving original architectural character.
New Builds
We construct bespoke new homes from architect-designed plans, specialising in energy-efficient builds with modern insulation standards. Our project management covers land acquisition guidance, planning applications, and building regulation approvals. We handle all aspects including foundations, roofing, and interior finishes, ensuring seamless delivery of high-specification properties tailored to client specifications.
Driveway Installations
We offer comprehensive driveway solutions using concrete, tarmac, gravel, or block paving materials. Our services include site surveys, design consultations, and professional installation that enhances kerb appeal. We provide durable, low-maintenance driveways with options for patterned concrete, coloured brickwork, and permeable surfaces to suit both residential and commercial properties.
Bathroom Refurbishment
Our bathroom refurbishment service covers complete overhauls and partial upgrades with modern fixtures and fittings. We handle plumbing, tiling, and electrical work while incorporating accessibility features where needed. Using high-quality materials and contemporary designs, we create functional, aesthetically pleasing spaces that improve daily living comfort and property value.
Questions
What building services do you offer in Cornwall?
We provide house extensions, loft conversions, new builds, renovations, driveways, patios, roofing, and interior refurbishments across Cornwall.
Do you handle planning permissions for building projects?
Yes, we assist with planning applications and building regulation approvals as part of our comprehensive service.
How do you ensure quality in construction projects?
We use qualified tradespeople, durable materials, and conduct regular quality checks throughout every project.
Are your services available throughout Cornwall?
Yes, we operate across all areas of Cornwall including St Austell, Truro, Falmouth, and surrounding regions.
What guarantees do you offer for your work?
All projects come with guarantees and are regulated by NHBC and Federation of Master Builders standards.
How do you manage project timelines and communication?
We provide regular updates and immediate notification of any potential delays during construction projects.
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