Mid Cornwall · PL26
One studio for extension in Whitemoor
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. Working in Whitemoor means starting from the PL26 context — Whitemoor is a china-clay village in the PL26 area, with workers housing, industrial landscape and practical family homes forming the local pattern, with a building stock that leans toward bungalows and workers cottages.
Whitemoor sits in Mid Cornwall — covering PL26 from St Austell, Bugle, St Dennis outward.
- Rural / open-countryside policy area
- ✓ One studio — design, planning and build under one roof
- ✓ Measured-survey accuracy from day one
- ✓ Local to Mid Cornwall — not a national franchise
- ✓ Same team on paper as on site
Our process
How a Whitemoor 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.
Local proof — Our Mid Cornwall workload means a Whitemoor extension project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Whitemoor.
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
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
04
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
Local context
Why Whitemoor is its own job.
Two things shape a Whitemoor application: parish character and policy. On policy — ground conditions, drainage, former industrial land and simple robust materials tend to shape the design and technical brief. 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. Get that local reading right and the rest of the Whitemoor programme tends to run on time. On bungalows in particular — the kind you'll also find toward Nanpean — the extension brief always has to read the existing fabric first.
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.
Local watch-list
Whitemoor-specific issues we screen on the first visit.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
Whitemoor is part of St Austell
Whitemoor sits inside the St Austell catchment — we cover both as one extension territory.
See Extensions in St Austell →Local fabric
Whitemoor extensions — the local-studio difference.
Building stock
Across Whitemoor (PL26) we work on workers cottages, terraced houses, post-war estates, bungalows, former industrial plots. Each stock type drives a different extension response — bungalows in particular needs careful detailing here.
Parish & policy
Whitemoor sits in the parish of Whitemoor, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover PL26 from our studio, with regular extension jobs also running in St Austell, Bugle, St Dennis. Most Whitemoor site visits get booked within the same week.
Can you handle both planning and build in Whitemoor?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Whitemoor builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Whitemoor runs the full mix — owner-occupier, holiday-let, commercial and the occasional smallholding — so we scope every extension enquiry from the use-class up.
FAQs
Whitemoor Extensions — local questions answered.
- What about the Party Wall Act?
- If you share a wall with a neighbour or build close to a boundary, the Act applies. We flag it early, recommend a surveyor and keep the programme aligned with the notice period. In Whitemoor specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- How much does an extension cost in Cornwall?
- 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.
- 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.
- Will my house be liveable during the build?
- For most rear and side extensions, yes — we sequence the works so the kitchen and one bathroom stay functional until the new build is watertight and connected.
- 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.
Other services in Whitemoor
Nearby places we cover
If you're balancing ambition against PL26 planning realism, our Whitemoor extension work threads that needle without the usual drama.