East Cornwall · PL14 · Cornwall Council East
St Cleer extensions — a East Cornwall studio
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. Anchor any St Cleer extension in the local fabric and the rest follows — St Cleer is a moorland-edge hamlet in the PL14 area, where exposed weather, narrow lanes and rural character set the brief, with a building stock that leans toward farm buildings and small rural infill.
St Cleer sits in East Cornwall — just off the A38; covering PL14 from Liskeard, Menheniot, Dobwalls outward.
- Rural / open-countryside policy area
- ✓Cornwall Council East sub-area regulars
- ✓Free first site visit, no obligation
- ✓Measured-survey accuracy from day one
- ✓One studio — design, planning and build under one roof
Free · No obligation
Free St Cleer feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Who this is for
In St Cleer the extension brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
Local watch-list
Common St Cleer pitfalls we plan around.
Watch #1
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around St Cleer
Watch #2
Party Wall notices and shallow roof voids typical of stone cottages in the PL14 district
Local proof — Most St Cleer extension clients we work with are second-time builders — they've seen the templated approach fail once already.
Get a free feasibility viewFAQs
St Cleer Extensions — local questions answered.
- 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. In St Cleer 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.
- We live in the house. Can a extension in St Cleer be done while we stay put?
- Usually yes for single-storey and rear work, with a temporary kitchen or bathroom arrangement agreed before the start. Whole-house remodels and roof work in St Cleer are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- 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.
- 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.
- 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.
Quick check
Want a straight answer on whether your St Cleer project is worth pursuing?
Send a few details — we'll come back within 1 working day with a plain-English view on planning risk, likely cost band and whether it's a project we'd take on.
Free · No obligation
Get a free feasibility view
For projects in St Cleer and the PL14 area.
Who this is for
Why this page exists, and who it is for
- Applications for St Cleer are handled through Cornwall Council, with Liskeard the nearest planning office we deal with regularly.
- Design and build are offered from the same studio, which means the person answering your St Cleer questions has seen the detail built.
- Drawings, planning and building regulations are all produced in-house, so a extension enquiry does not get passed between firms.
Planning rules change and every site is different. For the final position on your address, check with Cornwall Council as the local planning authority or the Planning Portal.
Keep reading
Follow the chain: survey, drawings, build
St Cleer is covered from our Liskeard run. Being a smaller place, the local detail matters more than the headline policy: lane access, neighbour proximity and what the immediate street already looks like.
Page purpose
Drawings only, or drawings through to handover in St Cleer?
Both routes are open on a PL14 project, and the honest answer depends on whether you already have a builder you trust. Plenty of St Cleer clients take the drawings, tender them locally, then come back to us for the build if the numbers do not stack up.
- Route one: feasibility, planning and a tender-ready technical pack
- Route two: the same pack, then the build under one contract
- Either way the survey and feasibility work is identical, so the decision can wait
- Fees quoted per stage against the PL14 scope, not as one opaque figure
Scope
What we can draw, survey and build around St Cleer
These stages can be bought separately. Most PL14 projects use three of them.
Construction and technical drawings
1:10 and 1:20 details for the parts of the job builders normally have to guess at.
Structural coordination
Calculations coordinated with the drawings so building control sees one consistent story.
Planning application drawings
Existing and proposed plans, elevations, site and block plans drawn to validation standard.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
Local context
Why St Cleer is its own job.
The planning backdrop in East Cornwall is real, not abstract: rural policy, landscape impact and services such as drainage are usually the key constraints, especially outside settlement boundaries. 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. Treat the PL14 parish brief as the design brief and the St Cleer application has somewhere to land. Whether the project is on farm buildings in the centre or further out toward Liskeard, the extension response is locally tuned.
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 Cleer.
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
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
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 St Cleer 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
Choosing a extension team that actually knows PL14.
Building stock
Across St Cleer (PL14) we work on stone cottages, farm buildings, isolated houses, converted barns, small rural infill. Each stock type drives a different extension response — farm buildings in particular needs careful detailing here.
Parish & policy
St Cleer sits in the parish of St Cleer, 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 St Cleer site visits get booked within the same week.
What does a first St Cleer consultation cost?
Nothing. We come to the property, walk the site, talk through what works on a PL14 plot and follow up with a written feasibility note inside a week — no obligation either way.
Request a free visitSt Cleer is part of Liskeard
St Cleer sits inside the Liskeard catchment — we cover both as one extension territory.
See Extensions in Liskeard →Other services in St Cleer
Nearby places we cover
Most St Cleer extension enquiries start with one honest conversation about what's actually allowed — and that conversation costs nothing. Lane access and rural policy tests shape what is realistic on an isolated plot.
Scope your PL14 project with a local studio Booked alongside our Liskeard runs.
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Book a free visit in St Cleer
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