North Cornwall · PL33
House Extensions in Delabole
Extensions are the bread and butter of Cornish homes — adding the kitchen-diner the original layout never had, the bedroom for a growing family, or the light and views the back of the house should always have had. A Delabole brief starts on the street, not the screen — Delabole is a small industrial settlement in the PL33 catchment, shaped by historic works, transport links and everyday village housing, with a building stock that leans toward former industrial buildings and small infill plots.
Delabole sits in North Cornwall — covering PL33 from Tintagel, Camelford, Truro outward.
- Rural / open-countryside policy area
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
Local watch-list
Common Delabole pitfalls we plan around.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
Who this is for
Delabole runs the full mix — owner-occupier, holiday-let, commercial and the occasional smallholding — so we scope every extension enquiry from the use-class up.
Local context
Why Delabole is its own job.
Old industrial plots, heritage remnants and mixed residential edges mean design statements need to explain scale, access and materials clearly. For extension specifically, Cornwall Council's Local Plan applies tighter tests to isolated rural dwellings here, so design rationale and policy fit need to be set out clearly from the outset. So every Delabole job runs as a PL33-specific piece of work — local policy, local fabric, local builders. Most of our extension work in Delabole lands on former industrial buildings, with detailing that has to nod to the wider Camelford streetscape.
Planning note
Most extensions in Cornwall are either permitted development or a straightforward householder application — but Conservation Area and AONB sites need a more careful design conversation upfront.
What we focus on
Extensions considerations specific to Delabole.
01
Extensions over a certain proportion of the original house trigger full Part L upgrade obligations to the existing building — worth knowing before brief is set.
02
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
03
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
04
Permitted development for rear extensions runs to four metres on a detached house, three on a semi or terrace — but Article 4 areas remove this in some parishes.
Our process
How a Delabole extension project runs.
Step 1
Brief
We meet on site, talk through how you live now and what's missing from the current layout.
Step 2
Design
Two or three sketch directions with rough budgets, then refinement of the chosen route.
Step 3
Approvals
Planning or Cert of Lawfulness, then a full building regs package.
Step 4
Build
Either through your own builder with our drawings, or as a full build by our team.
Step 5
Handover
Snag, certify, hand over the keys to your new space.
Typical single-storey rear extensions run twelve to twenty weeks on site; two-storey and wraparound projects sixteen to thirty weeks.
FAQs
Delabole Extensions — local questions answered.
- How much does an extension cost in Delabole?
- Build costs in Cornwall typically run from around £2,200 to £3,200 per square metre for a good-quality single-storey extension, more for kitchen-grade fit-out or complex glazing. We give a realistic budget before drawings start, not after. In Delabole specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- Can you handle the build as well as the design?
- Yes — that's the whole point of the studio. One contract, one point of contact, no finger-pointing between architect and builder when something needs a decision on site.
- How long does the whole process take?
- Allow roughly three months for design and approvals, then twelve to twenty weeks on site for a typical single-storey extension. Wraparounds and two-storey add-ons take longer, mostly through approval and groundworks.
Delabole is part of Tintagel
Delabole sits inside the Tintagel catchment — we cover both as one extension territory.
See Extensions in Tintagel →Local proof — Our North Cornwall workload means a Delabole extension project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewOther services in Delabole
Nearby places we cover
For Delabole homeowners weighing up a extension, the right starting point is honest feasibility — that's what we lead with, before any drawings.