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design – build – renovate
Professional Cornish construction company ~ new builds, extensions, loft conversions, alterations and general carpentry/building work.
Cornwall Builders – 4K Construction – make building residential or commercial projects a success.
Simply stunning residential building, commercial construction and architecture delivered on-time, on-budget and with zero defects.
These aren’t just bold claims – they’re what our clients have told us – have a look through our testimonials. 4K Construction will capture your design and build, refurbishment or extension vision, nurture your ideas and build an environment which is beautiful to the eye and a pleasure to experience time and time again.
It’s why 80% of our clients come from referrals alone. Our case studies are testimony to this.
Whether you need construction, architecture or design & build in residential or commercial environments, explore our site to find out more about what 4K Construction can do for your project.

Our services
Good design doesn’t date.
Residential Architecture
Basement Conversions
House Extensions
House Refurbishment
Loft Conversions
New Builds
Project Management
Commercial Architecture
Bar and Club Refurbishment
Commercial New Builds
Office Refurbishment
Shop Fitting
Project Management
