Mid Cornwall · TR4
Extensions for Mount Hawke (TR4)
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. Mount Hawke sits in Mid Cornwall, and that geography ends up in the drawings — Mount Hawke is a former mining settlement in the TR4 area, with granite terraces, chapel buildings and industrial landscape character still visible, with a building stock that leans toward miners cottages and chapel conversions.
Mount Hawke sits in Mid Cornwall — covering TR4 from St Agnes, Trevellas, Mithian outward.
- Cornwall AONB
- Cornish Mining World Heritage Site
- Rural / open-countryside policy area
- ✓ Local to Mid Cornwall — not a national franchise
- ✓ Same team on paper as on site
- ✓ One studio — design, planning and build under one roof
- ✓ Measured-survey accuracy from day one
Our process
How a Mount Hawke 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 — Our Mid Cornwall workload means a Mount Hawke extension project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Mount Hawke.
01
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
02
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
03
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.
04
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.
Local context
Why Mount Hawke is its own job.
In Mount Hawke the planning picture is specific: mining heritage, old plot widths and traditional materials make proportion and detailing more important than generic extension templates. For extension specifically, 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; the wider area forms part of the Cornish Mining World Heritage Site, which adds a heritage assessment layer to most material changes; 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. That local reading is what makes a Mount Hawke (TR4) project different from a generic Cornwall scheme — and is the whole reason we work this way. On miners cottages in particular — the kind you'll also find toward Goonbell — 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
What usually catches extension projects out in Mount Hawke.
Watch #1
AONB landscape-impact scrutiny on visible elevations
Watch #2
World Heritage Site assessment on changes visible in the mining landscape
Watch #3
Tighter Local Plan tests on isolated rural dwellings
Mount Hawke is part of St Agnes
Mount Hawke sits inside the St Agnes catchment — we cover both as one extension territory.
See Extensions in St Agnes →Local fabric
What sets a Mount Hawke extension brief apart.
Building stock
Across Mount Hawke (TR4) we work on miners cottages, granite terraces, chapel conversions, workers cottages, post-war estates. Each stock type drives a different extension response — miners cottages in particular needs careful detailing here.
Parish & policy
Mount Hawke sits in the parish of Mount Hawke, 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 St Agnes, Trevellas, Mithian. Most Mount Hawke site visits get booked within the same week.
Can you handle both planning and build in Mount Hawke?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Mount Hawke builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Mount Hawke 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
Mount Hawke 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 Mount Hawke specifically, we'd start by checking AONB landscape sensitivity 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.
- 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 Mount Hawke
Nearby places we cover
Every Mount Hawke extension we work on is treated as a TR4 job in its own right — local fabric, local policy, local builders.