Mid Cornwall · TR1 · Cornwall Council Mid
Design, planning and build for Treliske renovation
Cornish housing stock is brilliant and infuriating in equal measure. We renovate cottages, farmhouses, mid-century homes and post-war estates — opening up layouts, fixing damp, adding light and bringing the property up to a standard worth living in. What works on a TR1 plot rarely works elsewhere — Treliske is a town-edge neighbourhood in the TR1 area, where modern housing, larger gardens and edge-of-settlement plots create practical development opportunities, with a building stock that leans toward infill plots and detached houses.
Treliske sits in Mid Cornwall — just off the A390; covering TR1 from Truro, St Michael Penkivel, Calenick outward.
- Rural / open-countryside policy area
- ✓30+ years of Cornwall Council approvals
- ✓Plain-English feasibility before any drawings
- ✓Measured-survey accuracy from day one
- ✓One studio — design, planning and build under one roof
Free · No obligation
Free Treliske feasibility call
Tell us about your renovation. We reply within 1 working day — no obligation.
Local proof — Our Mid Cornwall workload means a Treliske renovation project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewLocal context
Why Treliske is its own job.
Cornwall Council's lens on Treliske is consistent: neighbour amenity, highways, drainage and the transition from built-up edge to countryside are usually the planning pressure points. For renovation 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. That's why we treat every Treliske project as a TR1-area job first — not a generic Cornwall job with a postcode bolted on. The infill plots that dominate Treliske (and continue out toward Calenick) set the tone for any renovation scheme here.
Planning note
Most Cornish renovations don't need planning — but listed status, curtilage listing, Conservation Area designation and material changes can all change that picture.
What we focus on
Renovations considerations specific to Treliske.
01
Older Cornish properties are often built with cob, rubble or solid granite — modern insulation strategies that work in cavity walls cause damp problems in solid construction. Breathable build-ups matter.
02
Damp in Cornish cottages is usually a moisture management problem, not a chemical injection problem — fixing the cause is cheaper long term than treating the symptom.
03
Listed and curtilage-listed properties need Listed Building Consent for many internal alterations that wouldn't normally need approval.
04
Original fireplaces, slate floors, beams and joinery are often worth rescuing; the design conversation should start with what stays, not what goes.
Page purpose
Drawings only, or drawings through to handover in Treliske?
Both routes are open on a TR1 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Treliske 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 TR1 scope, not as one opaque figure
Scope
Where our work starts and stops on a TR1 project
These stages can be bought separately. Most TR1 projects use three of them.
Planning application drawings
Existing and proposed plans, elevations, site and block plans drawn to validation standard.
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.
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.
Who this is for
Our footing in Mid Cornwall
- Drawings, planning and building regulations are all produced in-house, so a renovation enquiry does not get passed between firms.
- Applications for Treliske are handled through Cornwall Council, with St Austell the nearest planning office we deal with regularly.
- Design and build are offered from the same studio, which means the person answering your Treliske questions has seen the detail built.
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
Related TR1 pages
Treliske is covered from our Truro 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.
Our process
How a Treliske renovation project runs.
Step 1
Survey
Measured survey, condition assessment, services check and listed status review.
Step 2
Design
Layout options, material strategy and a clear list of what stays and what changes.
Step 3
Approvals
Listed Building Consent and building regulations as needed.
Step 4
Strip-out and works
Carefully sequenced demolition, structural works and rebuild.
Step 5
Finish and handover
Joinery, decoration, snagging and documentation pack.
Whole-house renovations typically run six to fourteen months on site; partial remodels two to four months.
Quick check
Want a straight answer on whether your Treliske 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 Treliske and the TR1 area.
Local fabric
Why a Mid Cornwall studio is the right fit for Treliske renovation.
Building stock
Across Treliske (TR1) we work on modern estates, bungalows, semis, detached houses, infill plots. Each stock type drives a different renovation response — infill plots in particular needs careful detailing here.
Parish & policy
Treliske sits in the parish of Treliske, which matters for how parish-level consultation lands on a renovation application.
Coverage
We cover TR1 from our studio, with regular renovation jobs also running in Truro, St Michael Penkivel, Calenick. Most Treliske site visits get booked within the same week.
How quickly can you visit a Treliske site?
Usually within the same week. Treliske (TR1) is on our regular Mid Cornwall run, alongside Truro, St Michael Penkivel, Calenick. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Treliske Renovations — local questions answered.
- Do I need planning permission to renovate internally?
- Usually no — except on listed buildings, where Listed Building Consent is needed for many internal alterations. We confirm the position before any wall comes down. In Treliske specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- How much does a full renovation cost in Cornwall?
- A whole-house renovation typically lands between £1,800 and £3,000 per square metre depending on condition, listed status and finish level. We survey before quoting and don't price by guesswork.
- We live in the house. Can a renovation in Treliske 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 Treliske are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- Can you renovate and extend at the same time?
- Yes, and often it's the right call — the planning, regs and disruption all happen once instead of twice. We design and price it as a single project.
- What about damp and old walls?
- We assess the cause first — usually rising damp myths, blocked vents, hard cement renders trapping moisture, or roofs needing attention. A breathable repair strategy fixes most of it without chemical intervention.
- How long does a renovation take?
- Single rooms in weeks, kitchens in two to three months, whole-house renovations in six to fourteen months depending on size and listed status.
Treliske is part of Truro
Treliske sits inside the Truro catchment — we cover both as one renovation territory.
See Renovations in Truro →Other services in Treliske
Nearby places we cover
To sum up, our renovation approach in Treliske is built entirely around local Cornwall context, ensuring the best possible outcome for your property. Lane access and rural policy tests shape what is realistic on an isolated plot.
Get the TR1 planning view before you draw St Austell handles the planning end for TR1.
Free · No obligation
Book a free visit in Treliske
No obligation. Reply usually same working day.