What We Build
Single-storey extensions — kitchen extensions, garden rooms, and open-plan rear extensions.
Two-storey extensions — adding bedrooms, bathrooms, and living space across two floors.
Side & wrap-around extensions — opening up the ground floor by combining side return and rear space.
Period & listed property extensions — extending older Cornish homes sympathetically, with matching materials and planning expertise.
Why Warvena
- Every extension built to the same standard as a bespoke new build
- Proper drawings and resolved specifications before work starts
- Built around you living in the home — clean, low-disruption sites
- AONB, conservation area, and listed property planning experience
- TrustMark registered · Passivhaus Trust listed · AECB members
House Extensions Near You in Cornwall
We work across the county — Truro, Falmouth, Redruth, St Ives, Newquay, St Austell, and throughout Cornwall.
FAQs
How much does a house extension cost in Cornwall?
Cost depends on size, specification, and ground conditions. We price each extension against a resolved design, so the figure reflects your actual project. Happy to discuss realistic budgets early.
Do I need planning permission?
Some extensions are permitted development; many aren't — especially in AONB zones, conservation areas, and listed properties. We advise on your specific property early.
Can I live in my home during the build?
In most cases, yes. We plan around you — dust protection, usable kitchens and bathrooms, clean sites throughout.
How long does an extension take?
Single-storey: typically three to five months. Two-storey and wrap-around take longer. Design and planning happen first.
Can you extend a listed or period property?
Yes. It needs matching materials, sympathetic design, and listed building consent alongside planning. We have the experience.