Mid Cornwall · TR9
Extensions for St Columb Major (TR9)
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 Columb Major starts with a measured walk-round — St Columb Major is a substantial inland market town east of Newquay, with the (former) cathedral-status fifteenth-century church and an extensive Conservation Area covering the medieval core, with a building stock that leans toward Victorian terraces and post-war estates.
St Columb Major sits in Mid Cornwall — covering TR9 from Indian Queens outward.
- Conservation Area
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
- ✓ Local to Mid Cornwall — not a national franchise
- ✓ Cornwall Council regulars across every sub-area
Local watch-list
Common St Columb Major pitfalls we plan around.
Watch #1
Conservation Area material and fenestration controls in central St Columb Major
Who this is for
St Columb Major 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 St Columb Major is its own job.
In St Columb Major the planning picture is specific: conservation Area is extensive, covering the historic streets including Fore Street and the church area. Listed buildings are common; A39 corridor shapes edge-of-town development. For extension specifically, parts of St Columb Major sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape. That local reading is what makes a St Columb Major (TR9) project different from a generic Cornwall scheme — and is the whole reason we work this way. On Victorian terraces in particular — the kind you'll also find toward Indian Queens — 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.
What we focus on
Extensions considerations specific to St Columb Major.
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
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
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 St Columb Major 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
St Columb Major 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 Columb Major 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.
- 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.
St Columb Major is the hub for these neighbourhoods
We run extensions across St Columb Major and the surrounding TR9 neighbourhoods — same studio, same site team.
Local proof — Recent extension enquiries from St Columb Major have clustered around Victorian terraces — we know the route through Cornwall Council on these.
Get a free feasibility viewOther services in St Columb Major
The TR9 stretch of Mid Cornwall has its own rhythm; our extension work respects it, and Cornwall Council usually responds in kind.