East Cornwall · PL14 · Cornwall Council East
Tremar 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. In Tremar, that work is shaped by the place itself — Tremar is a small rural hamlet in the PL14 area, with scattered homes, lanes and a deliberately quiet settlement pattern, with a building stock that leans toward cottages and converted barns.
Tremar sits in East Cornwall — just off the A38; covering PL14 from Liskeard, Menheniot, Dobwalls outward.
- Rural / open-countryside policy area
- ✓30+ years of Cornwall Council approvals
- ✓rural policy area experience built into the fee
- ✓Measured-survey accuracy from day one
- ✓One studio — design, planning and build under one roof
Free · No obligation
Free Tremar feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Who this is for
In Tremar 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 Tremar pitfalls we plan around.
Watch #1
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around Tremar
Watch #2
Party Wall notices and shallow roof voids typical of cottages in the PL14 district
Local proof — Our East Cornwall workload means a Tremar extension project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewFAQs
Tremar 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 Tremar specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- 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.
- 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.
- 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.
- We live in the house. Can a extension in Tremar 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 Tremar are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- 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.
Quick check
Want a straight answer on whether your Tremar 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 Tremar and the PL14 area.
Who this is for
Why this page exists, and who it is for
- Applications for Tremar 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 Tremar 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
Tremar 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 Tremar?
Both routes are open on a PL14 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Tremar 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 Tremar
Not every project needs every stage. On a Tremar job we scope to what the site and the consent route actually require.
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.
Full design and build
One contract from first sketch to handover, with the same team on paper and on site.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Local context
Why Tremar is its own job.
The planning backdrop in East Cornwall is real, not abstract: the main planning test is usually whether the proposal remains subordinate, locally detailed and acceptable on access, drainage and neighbour amenity. 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 Tremar application has somewhere to land. Whether the project is on cottages 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 Tremar.
01
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
02
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
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.
Our process
How a Tremar 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 Tremar homeowners pick a local studio for extension.
Building stock
Across Tremar (PL14) we work on cottages, farmhouses, converted barns, bungalows, small infill homes. Each stock type drives a different extension response — cottages in particular needs careful detailing here.
Parish & policy
Tremar sits in the parish of Tremar, 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 Tremar site visits get booked within the same week.
What does a first Tremar 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 visitTremar is part of Liskeard
Tremar sits inside the Liskeard catchment — we cover both as one extension territory.
See Extensions in Liskeard →Other services in Tremar
Nearby places we cover
From initial feasibility to final handover, we manage extension projects across Tremar with careful attention to what makes East Cornwall unique. 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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