East Cornwall · PL14
Extensions Darite: PL14 planning, East Cornwall fabric
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 PL14 site visit comes before a Darite sketch, every time — Darite is a former mining settlement in the PL14 area, with granite terraces, chapel buildings and industrial landscape character still visible, with a building stock that leans toward miners cottages and post-war estates.
Darite sits in East Cornwall — covering PL14 from Liskeard, Menheniot, Dobwalls outward.
- Rural / open-countryside policy area
- ✓ rural policy area experience built into the fee
- ✓ Free first site visit, no obligation
- ✓ 30+ years of Cornwall Council approvals
- ✓ Local to East Cornwall — not a national franchise
Local proof — Most Darite homeowners come to us after a extension quote elsewhere felt vague on planning — we lead with feasibility instead.
Get a free feasibility viewLocal context
Why Darite is its own job.
Mining heritage, old plot widths and traditional materials make proportion and detailing more important than generic extension templates. That sets the scene before any design work begins. For extension specifically, 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. It's the kind of detail that decides whether a Darite application gets approved at eight weeks or stalls in committee. The miners cottages that dominate Darite (and continue out toward Dobwalls) set the tone for any extension scheme here.
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 Darite.
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
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
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
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
Our process
How a Darite 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 fabric
Why Darite homeowners pick a local studio for extension.
Building stock
Across Darite (PL14) 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
Darite sits in the parish of Darite, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover PL14 from our studio, with regular extension jobs also running in Liskeard, Menheniot, Dobwalls. Most Darite site visits get booked within the same week.
How quickly can you visit a Darite site?
Usually within the same week. Darite (PL14) is on our regular East Cornwall run, alongside Liskeard, Menheniot, Dobwalls. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Darite Extensions — local questions answered.
- 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. In Darite specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- 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.
- 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.
- 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.
Darite is part of Liskeard
Darite sits inside the Liskeard catchment — we cover both as one extension territory.
See Extensions in Liskeard →Other services in Darite
Nearby places we cover
Most Darite extension enquiries start with one honest conversation about what's actually allowed — and that conversation costs nothing.