West Cornwall · TR27
One studio for extension in Townshend
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 Townshend means starting from the TR27 context — Townshend is a small rural hamlet in the TR27 area, with scattered homes, lanes and a deliberately quiet settlement pattern, with a building stock that leans toward small infill homes and farmhouses.
Townshend sits in West Cornwall — covering TR27 from Hayle, Angarrack, Phillack outward.
- Rural / open-countryside policy area
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
- ✓ One studio — design, planning and build under one roof
- ✓ Local to West Cornwall — not a national franchise
Our process
How a Townshend 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 — Recent extension enquiries from Townshend have clustered around small infill homes — we know the route through Cornwall Council on these.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Townshend.
01
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
02
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
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.
Local context
Why Townshend is its own job.
Two things shape a Townshend application: parish character and policy. On policy — the main planning test is usually whether the proposal remains subordinate, locally detailed and acceptable on access, drainage and neighbour amenity. 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 Townshend programme tends to run on time. On small infill homes in particular — the kind you'll also find toward Connor Downs — 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
What usually catches extension projects out in Townshend.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
Townshend is part of Hayle
Townshend sits inside the Hayle catchment — we cover both as one extension territory.
See Extensions in Hayle →Local fabric
What sets a Townshend extension brief apart.
Building stock
Across Townshend (TR27) we work on cottages, farmhouses, converted barns, bungalows, small infill homes. Each stock type drives a different extension response — small infill homes in particular needs careful detailing here.
Parish & policy
Townshend sits in the parish of Townshend, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover TR27 from our studio, with regular extension jobs also running in Hayle, Angarrack, Phillack. Most Townshend site visits get booked within the same week.
Can you handle both planning and build in Townshend?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Townshend builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Townshend 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
Townshend 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 Townshend 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.
- Do I need planning permission for an extension?
- Often no — single-storey rear extensions, side extensions and modest two-storey additions can sit inside permitted development on a typical detached house. Conservation Areas, AONB and Article 4 zones remove some of those rights, so we always check the address first.
- 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.
Other services in Townshend
Nearby places we cover
If you're balancing ambition against TR27 planning realism, our Townshend extension work threads that needle without the usual drama.