South Cornwall · PL26
Extensions for Mevagissey (PL26)
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 Mevagissey starts with a measured walk-round — Mevagissey is a working fishing port south of St Austell, with the second-busiest fishing fleet in Cornwall and an exceptionally dense Conservation Area of slate-hung cottages around its inner and outer harbours, with a building stock that leans toward modern infill on the village fringes and Victorian terraces above the harbour.
Mevagissey sits in South Cornwall — covering PL26 from Gorran Haven, Mevagissey, St Austell outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
- ✓ Local to South Cornwall — not a national franchise
- ✓ Free first site visit, no obligation
Our process
How a Mevagissey 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 — Most Mevagissey homeowners come to us after a extension quote elsewhere felt vague on planning — we lead with feasibility instead.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Mevagissey.
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 Mevagissey is its own job.
In Mevagissey the planning picture is specific: conservation Area covers the entire historic harbour area; AONB across most of the parish. Slate-hung walls and traditional sash windows are the design baseline; modern alterations face high scrutiny. For extension specifically, parts of Mevagissey 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; coastal salt-laden air around Mevagissey drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That local reading is what makes a Mevagissey (PL26) project different from a generic Cornwall scheme — and is the whole reason we work this way. On modern infill on the village fringes in particular — the kind you'll also find toward Gorran Haven — 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
Local snags worth knowing before drawing a Mevagissey extension.
Watch #1
Conservation Area material and fenestration controls in central Mevagissey
Watch #2
AONB landscape-impact scrutiny on visible elevations
Watch #3
Coastal exposure driving fixing, render and joinery spec
Local fabric
Mevagissey extensions — the local-studio difference.
Building stock
Across Mevagissey (PL26) we work on slate-hung fishermen's cottages, Victorian terraces above the harbour, Edwardian guesthouses, modern infill on the village fringes. Each stock type drives a different extension response — modern infill on the village fringes in particular needs careful detailing here.
Parish & policy
Mevagissey is its own town in South Cornwall, with planning history that's specific to the PL26 catchment.
Coverage
We cover PL26 from our studio, with regular extension jobs also running in Gorran Haven, Mevagissey, St Austell. Most Mevagissey site visits get booked within the same week.
Can you handle both planning and build in Mevagissey?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Mevagissey builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Mevagissey 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
Mevagissey Extensions — local questions answered.
- How much does an extension cost in Mevagissey?
- 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. In Mevagissey specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- 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.
- 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.
- 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 Mevagissey
Nearby places we cover
The PL26 stretch of South Cornwall has its own rhythm; our extension work respects it, and Cornwall Council usually responds in kind.