Serving Cornwall & the South West

Your Trusted
Building Specialists
in Cornwall &
the South West

From home extensions and full renovations to roofing, brickwork, and groundwork — General Building Services South West delivers quality craftsmanship with a personal, local touch you can rely on.

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Fully Insured
Free Quotes
Local Experts
5★ Rated

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15+
Years of Experience
500+
Projects Completed
100%
Fully Insured
5★
Google Rated
What We Do

Our Building Services

From the ground up to the roof above, we cover every aspect of building work across Cornwall and the South West — with quality craftsmanship on every job, big or small.

Extensions & Conversions

Single and double-storey extensions, loft conversions, garage conversions, and kitchen extensions — expertly designed and built to add real value to your Cornish home.

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Renovations & Refurbishments

Complete property renovations, room refurbs, and full-house transformations. We breathe new life into older properties right across the South West.

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Roofing

New roofs, re-roofs, slate and tile work, flat roofing, and repairs. We understand the unique demands of Cornwall's coastal weather on roofing structures.

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Plastering

Skilled plastering and rendering for both internal and external surfaces. Smooth finishes, patch repairs, and full skim coats — completed to the highest standard.

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Brickwork & Blockwork

Traditional and modern brickwork, blockwork, repointing, retaining walls, garden walls, and structural repairs. Built to last in the South West climate.

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Groundwork & Drainage

Foundations, drainage systems, driveways, patios, footings, and site clearance. We prepare the ground right so your project starts on solid footing.

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Carpentry & Joinery

Stud walling, timber framing, structural joinery, door and window fitting, and bespoke carpentry solutions for residential and commercial projects alike.

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Damp Proofing & Waterproofing

Damp surveys, rising damp treatment, cavity wall drainage, and external waterproofing — essential for older Cornish stone properties near the coast.

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Project Management

Full project management from initial planning and council liaison through to final handover. We coordinate trades, timelines, and budgets so you don't have to.

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Skilled builder at work on a Cornwall construction project
15+
Years Serving
Cornwall
About Us

Built on Trust,
Rooted in Cornwall

General Building Services South West has been serving homeowners, landlords, and businesses across Cornwall and the wider South West for over 15 years. Based right here in Penzance, we're as local as it gets — and that matters when it comes to understanding the unique character of Cornish properties and the demands of our coastal climate.

Whether you're planning a major extension, need a re-roof before winter, or want to renovate an old stone cottage, our experienced team brings the same level of dedication and pride to every project. We believe in honest communication, fair pricing, and craftsmanship that stands the test of time.

Honest, Transparent Pricing

No hidden costs, no nasty surprises. We provide clear, detailed quotes before any work begins.

Skilled, Local Tradespeople

Our team of experienced builders and craftsmen are from the local community — we care about our reputation here.

Fully Insured & Compliant

All work is fully insured and complies with current Building Regulations, giving you total peace of mind.

Clean, Respectful Working Practices

We treat your property like our own — keeping sites tidy, minimising disruption, and always finishing the job.

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Why Cornish Homeowners Choose General Building Services South West

Fully Insured

Complete public liability and employer's insurance for your total protection.

Free Quotes

No-obligation quotes with clear, itemised pricing — no pushy salespeople.

Quality Guaranteed

Every job is completed to the highest standard with a satisfaction guarantee.

Local Experts

Proudly based in Penzance — we know Cornwall's properties inside and out.

Customer Reviews

What Our Clients Say

Don't just take our word for it — here's what homeowners and businesses across Cornwall say about working with us.

"We had a large single-storey extension built on our home in Penzance and the team at General Building Services were absolutely brilliant from start to finish. Clean, professional, and finished on time. Highly recommend."

MB
Martin B.
Penzance, Cornwall

"Had our old granite cottage completely renovated — new roof, replastered throughout, and a brand new kitchen extension. The standard of workmanship was exceptional. True Cornish craftsmen."

SC
Sarah C.
St Ives, Cornwall

"Our driveway and groundworks were done to an incredibly high standard. The team kept us informed every step of the way. Pricing was very fair and transparent — exactly what you want from a local builder."

RH
Robert H.
Helston, Cornwall

"Used them for plastering and brickwork repairs on a period property in Falmouth. They matched the existing stonework perfectly and the plasterwork is flawless. Will absolutely use again."

LT
Louise T.
Falmouth, Cornwall

"They project managed our whole barn conversion from start to finish and it was seamless. Every trade was coordinated brilliantly and the result is stunning. Worth every penny — genuinely top class."

JW
James W.
Hayle, Cornwall

"I've used a lot of builders over the years but GBSSW are on a different level. Their attention to detail is second to none. They re-roofed our property in Newlyn and it's been watertight through two Cornish winters now."

PK
Paul K.
Newlyn, Cornwall
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Ready to Start Your Project?

Contact us for a free, no-obligation quote. We'll get back to you within 24 hours and can usually arrange a site visit within the week.

Contact Information

Our Address
York St
Penzance
TR18 2PW
Cornwall, UK