Mid Cornwall · TR2
One studio for extension in St Michael Penkivel
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. The way we approach extension in St Michael Penkivel starts with a measured walk-round — St Michael Penkivel is an estate-influenced village in the TR2 area, with designed landscape, older cottages and rural edges close together, with a building stock that leans toward small infill plots and farm buildings.
St Michael Penkivel sits in Mid Cornwall — covering TR2 from Truro, Calenick, Malpas outward.
- Rural / open-countryside policy area
- ✓ Local to Mid Cornwall — not a national franchise
- ✓ Same team on paper as on site
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
Our process
How a St Michael Penkivel 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 St Michael Penkivel 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 St Michael Penkivel.
01
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
02
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
03
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.
04
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.
Local context
Why St Michael Penkivel is its own job.
Two things shape a St Michael Penkivel application: parish character and policy. On policy — landscape setting, curtilage history and estate character need a precise design rationale rather than a standard suburban approach. 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 St Michael Penkivel programme tends to run on time. On small infill plots in particular — the kind you'll also find toward Kea — 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
Local snags worth knowing before drawing a St Michael Penkivel extension.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
St Michael Penkivel is part of Truro
St Michael Penkivel sits inside the Truro catchment — we cover both as one extension territory.
See Extensions in Truro →Local fabric
What sets a St Michael Penkivel extension brief apart.
Building stock
Across St Michael Penkivel (TR2) we work on estate cottages, farm buildings, detached homes, converted outbuildings, small infill plots. Each stock type drives a different extension response — small infill plots in particular needs careful detailing here.
Parish & policy
St Michael Penkivel sits in the parish of St Michael Penkivel, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover TR2 from our studio, with regular extension jobs also running in Truro, Calenick, Malpas. Most St Michael Penkivel site visits get booked within the same week.
Can you handle both planning and build in St Michael Penkivel?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing St Michael Penkivel builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
St Michael Penkivel 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
St Michael Penkivel 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 St Michael Penkivel 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 St Michael Penkivel
Nearby places we cover
The TR2 stretch of Mid Cornwall has its own rhythm; our extension work respects it, and Cornwall Council usually responds in kind.