Roseland · TR2 · Cornwall Council Mid
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 — just off the A3078; covering TR2 from Veryan, Ruan Lanihorne, Philleigh 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
Free · No obligation
Free Tregony feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
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.
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 viewScope
The parts of the job we can take on in Tregony
Clients in Tregony take different slices of this list, and that is deliberate.
Construction and technical drawings
1:10 and 1:20 details for the parts of the job builders normally have to guess at.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Planning application drawings
Existing and proposed plans, elevations, site and block plans drawn to validation standard.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
Heritage and design statements
Written justification where designation makes the design case as important as the drawing.
Who this is for
What we can genuinely back up in Tregony
- Design and build are offered from the same studio, which means the person answering your Tregony questions has seen the detail built.
- Drawings, planning and building regulations are all produced in-house, so a extension enquiry does not get passed between firms.
- Designated-area work is routine here, so heritage and landscape statements are produced alongside the drawings rather than outsourced.
Planning rules change and every site is different. For the final position on your address, check with Cornwall Council as the local planning authority or the Planning Portal.
Keep reading
Other work we do around Tregony
Tregony works as a hub for us: the same extension team covers Philleigh, Ruan Lanihorne and the surrounding TR2 villages, so a site visit here often takes in more than one address.
Page purpose
Drawings only, or drawings through to handover in Tregony?
Both routes are open on a TR2 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Tregony clients take the drawings, tender them locally, then come back to us for the build if the numbers do not stack up.
- Route one: feasibility, planning and a tender-ready technical pack
- Route two: the same pack, then the build under one contract
- Either way the survey and feasibility work is identical, so the decision can wait
- Fees quoted per stage against the TR2 scope, not as one opaque figure
Quick check
Want a straight answer on whether your Tregony project is worth pursuing?
Send a few details — we'll come back within 1 working day with a plain-English view on planning risk, likely cost band and whether it's a project we'd take on.
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Get a free feasibility view
For projects in Tregony and the TR2 area.
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.
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 Ruan Lanihorne 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.
Local watch-list
Tregony-specific issues we screen on the first visit.
Watch #1
Conservation Area controls on materials, window proportions and roof form through central Tregony
Watch #2
AONB landscape-impact testing on anything read in long views across Roseland
Watch #3
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around Tregony
Tregony is the hub for these neighbourhoods
We run extensions across Tregony and the surrounding TR2 neighbourhoods — same studio, same site team.
- Philleigh
TR2
- Ruan Lanihorne
TR2
Local fabric
What sets a Tregony extension brief apart.
Building stock
Across Tregony (TR2) we work on Georgian townhouses on Fore Street, Victorian villas, Edwardian houses, post-war bungalows, modern AONB-sensitive infill. Each stock type drives a different extension response — Edwardian houses in particular needs careful detailing here.
Parish & policy
Tregony is its own town in Roseland, with planning history that's specific to the TR2 catchment.
Coverage
We cover TR2 from our studio, with regular extension jobs also running in Veryan, Ruan Lanihorne, Philleigh. Most Tregony site visits get booked within the same week.
Do you work in Tregony regularly?
Yes — Tregony and the wider TR2 catchment are core territory. We're typically on a Roseland site at least once a week, so logistics are baked in, not bolted on.
Request a free visitWho this is for
In Tregony the extension brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
FAQs
Tregony Extensions — local questions answered.
- We live in the house. Can a extension in Tregony be done while we stay put?
- Usually yes for single-storey and rear work, with a temporary kitchen or bathroom arrangement agreed before the start. Whole-house remodels and roof work in Tregony are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- 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.
Other services in Tregony
Nearby places we cover
Local neighbourhoods in Tregony
Designing a extension in Tregony is as much about reading the parish as reading the brief; we do both, and the planning outcomes follow. Here that means the Conservation Area boundary decides the route before the design does.
Walk us round your Tregony site — free first visit Most Tregony visits happen within the week.
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Book a free visit in Tregony
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