North Cornwall · TR4
Rose extensions — a North Cornwall studio
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. In Rose, that work is shaped by the place itself — Rose is a small rural hamlet in the TR4 area, with scattered homes, lanes and a deliberately quiet settlement pattern, with a building stock that leans toward cottages and farmhouses.
Rose sits in North Cornwall — covering TR4 from Perranporth, Goonhavern, Bolingey outward.
- Rural / open-countryside policy area
- ✓ 30+ years of Cornwall Council approvals
- ✓ rural policy area experience built into the fee
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
Who this is for
Rose 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 watch-list
Rose-specific issues we screen on the first visit.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
Local proof — Most Rose homeowners come to us after a extension quote elsewhere felt vague on planning — we lead with feasibility instead.
Get a free feasibility viewFAQs
Rose Extensions — local questions answered.
- 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. In Rose specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- 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.
- 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.
- 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.
- 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.
Local context
Why Rose is its own job.
The planning backdrop in North Cornwall is real, not abstract: 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. Treat the TR4 parish brief as the design brief and the Rose application has somewhere to land. Whether the project is on cottages in the centre or further out toward Perranporth, the extension response is locally tuned.
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 Rose.
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
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
03
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
04
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
Our process
How a Rose 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 fabric
Why a North Cornwall studio is the right fit for Rose extension.
Building stock
Across Rose (TR4) we work on cottages, farmhouses, converted barns, bungalows, small infill homes. Each stock type drives a different extension response — cottages in particular needs careful detailing here.
Parish & policy
Rose sits in the parish of Rose, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover TR4 from our studio, with regular extension jobs also running in Perranporth, Goonhavern, Bolingey. Most Rose site visits get booked within the same week.
What does a first Rose consultation cost?
Nothing. We come to the property, walk the site, talk through what works on a TR4 plot and follow up with a written feasibility note inside a week — no obligation either way.
Request a free visitRose is part of Perranporth
Rose sits inside the Perranporth catchment — we cover both as one extension territory.
See Extensions in Perranporth →Other services in Rose
Nearby places we cover
The extension jobs we're proudest of in Rose are the ones where the planning route was clear before a single elevation was drawn.