Roseland · TR2
House Extensions in Tregony
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 Tregony brief starts on the street, not the screen — Tregony is an AONB former rotten borough at the head of the Fal estuary, with a wide Georgian high street and one of Cornwall's quieter period property markets, with a building stock that leans toward Edwardian houses and modern AONB-sensitive infill.
Tregony sits in Roseland — covering TR2 from Veryan outward.
- Conservation Area
- Cornwall AONB
- Rural / open-countryside policy area
- ✓ Fixed-fee planning packages, no surprise invoices
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
- ✓ Local to Roseland — not a national franchise
Local watch-list
Tregony-specific issues we screen on the first visit.
Watch #1
Conservation Area material and fenestration controls in central Tregony
Watch #2
AONB landscape-impact scrutiny on visible elevations
Watch #3
Tighter Local Plan tests on isolated rural dwellings
Who this is for
Tregony 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 Tregony is its own job.
Conservation Area covers the historic high street and church; AONB across the parish. Former borough heritage and listed buildings shape design considerations. For extension specifically, parts of Tregony sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape; the surrounding landscape falls inside the Cornwall Area of Outstanding Natural Beauty, so massing, height and landscape impact carry extra weight in any planning decision; 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 Tregony job runs as a TR2-specific piece of work — local policy, local fabric, local builders. Most of our extension work in Tregony lands on Edwardian houses, with detailing that has to nod to the wider Grampound 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 Tregony.
01
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.
02
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.
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.
Our process
How a Tregony 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
Tregony 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 Tregony specifically, we'd start by checking the Conservation Area boundary 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.
- 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.
- 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.
Local proof — We typically have one or two extension jobs live in the TR2 area at any time, so the local planning officers know our drawings on sight.
Get a free feasibility viewOther services in Tregony
Nearby places we cover
For Tregony homeowners weighing up a extension, the right starting point is honest feasibility — that's what we lead with, before any drawings.