East Cornwall · PL15
One studio for extension in Lewannick
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. Working in Lewannick means starting from the PL15 context — Lewannick is a rural parish in the PL15 area, with farmsteads, lanes and scattered homes defining its built character, with a building stock that leans toward scattered modern homes and converted barns.
Lewannick sits in East Cornwall — covering PL15 from Launceston, Warbstow, North Petherwin outward.
- Rural / open-countryside policy area
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
Our process
How a Lewannick 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 PL15 area at any time, so the local planning officers know our drawings on sight.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Lewannick.
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 Lewannick is its own job.
Two things shape a Lewannick application: parish character and policy. On policy — open-countryside policy, access lanes, drainage and agricultural building history all need to be addressed before drawings go too far. 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. Get that local reading right and the rest of the Lewannick programme tends to run on time. On scattered modern homes in particular — the kind you'll also find toward Boyton — 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
The PL15 constraints that shape a extension brief.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
Lewannick is part of Launceston
Lewannick sits inside the Launceston catchment — we cover both as one extension territory.
See Extensions in Launceston →Local fabric
Lewannick extensions — the local-studio difference.
Building stock
Across Lewannick (PL15) we work on farmhouses, converted barns, rural cottages, smallholdings, scattered modern homes. Each stock type drives a different extension response — scattered modern homes in particular needs careful detailing here.
Parish & policy
Lewannick sits in the parish of Lewannick, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover PL15 from our studio, with regular extension jobs also running in Launceston, Warbstow, North Petherwin. Most Lewannick site visits get booked within the same week.
Can you handle both planning and build in Lewannick?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Lewannick builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Lewannick 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
Lewannick Extensions — local questions answered.
- How much does an extension cost in Lewannick?
- 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 Lewannick specifically, we'd start by checking the latest parish-level planning history 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 Lewannick
Nearby places we cover
If you're balancing ambition against PL15 planning realism, our Lewannick extension work threads that needle without the usual drama.