Mid Cornwall · TR1 · Cornwall Council Mid
New Builds Treliske: TR1 planning, Mid Cornwall fabric
A bespoke new build is the longest project we do, and the most rewarding. From plot appraisal through planning, building regulations and construction, you work with one team from the first sketch to the handover walk-round. 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 modern estates and infill plots.
Treliske sits in Mid Cornwall — just off the A390; covering TR1 from Truro, St Michael Penkivel, Calenick 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
- ✓Measured-survey accuracy from day one
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Free Treliske feasibility call
Tell us about your new build. We reply within 1 working day — no obligation.
Local proof — Most Treliske new build clients we work with are second-time builders — they've seen the templated approach fail once already.
Get a free feasibility viewLocal context
Why Treliske is its own job.
Neighbour amenity, highways, drainage and the transition from built-up edge to countryside are usually the planning pressure points. That sets the scene before any design work begins. For new build 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 Treliske application gets approved at eight weeks or stalls in committee. The modern estates that dominate Treliske (and continue out toward Calenick) set the tone for any new build scheme here.
Planning note
Cornwall's planning policy on new dwellings is among the most restrictive in England outside Greater London. The first conversation should be a planning conversation, not a design one.
What we focus on
New Builds considerations specific to Treliske.
01
Off-grid services — package treatment plants, borehole supply, off-mains gas — are common on rural Cornish plots and need designing, not assuming.
02
Self-build CIL exemption requires the right documentation in the right order; missing a step costs five-figure sums.
03
AONB and Heritage Coast designations apply to large stretches of the county; isolated new builds outside settlement boundaries face a much higher policy bar.
04
Replacement dwellings have specific volumetric tests — getting the ratio between existing footprint and proposed floor area right is the difference between approval and refusal.
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
Not every project needs every stage. On a Treliske 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.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
Who this is for
Our footing in Mid Cornwall
- 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.
- Drawings, planning and building regulations are all produced in-house, so a new build 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
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 new build project runs.
Step 1
Plot review
Site visit, planning history check, designation review and an honest feasibility verdict.
Step 2
Concept design
Sketches that test the plot in massing, orientation and approach before any drawings are committed.
Step 3
Planning
Pre-app, full planning, consultee management and condition discharge.
Step 4
Technical design and build prep
Building regs, structural design, services strategy and contractor procurement.
Step 5
Construction and handover
Build delivered under contract administration with regular client reviews.
Most bespoke new builds run eighteen to thirty months from instruction to keys, depending on site, planning route and build complexity.
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.
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Get a free feasibility view
For projects in Treliske and the TR1 area.
Local fabric
Why Treliske homeowners pick a local studio for new build.
Building stock
Across Treliske (TR1) we work on modern estates, bungalows, semis, detached houses, infill plots. Each stock type drives a different new build response — modern estates 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 new build application.
Coverage
We cover TR1 from our studio, with regular new build 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 New Builds — local questions answered.
- How much does a new build cost?
- Realistic budgets in Cornwall start around £2,800 per square metre for a good-quality build and rise quickly with bespoke joinery, large glazing, complex sites and high-spec finishes. We work to your number, not against it. In Treliske specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- Can I build a new house on my plot in Cornwall?
- Sometimes yes, sometimes no — and the honest answer needs a planning policy review of the specific site. Settlement boundary, designations, access and policy on isolated dwellings all weigh in. We give a frank read at first consultation rather than a sales pitch.
- What's a replacement dwelling and is mine eligible?
- If a habitable dwelling exists on the plot, you can often replace it — within volumetric and design constraints set by Cornwall's Local Plan. Derelict structures sometimes qualify, sometimes don't, depending on lawful use history.
- How long does the whole project take?
- Allow six to twelve months for design and approvals, then ten to fourteen months on site for a typical four-bedroom new build. Complex sites or long planning routes extend that.
- We live in the house. Can a new build 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.
- What about utilities, drainage and access?
- All designed and applied for as part of the package — water, electric, off-mains drainage where mains isn't viable, and highways access agreement with Cornwall Council where required.
Treliske is part of Truro
Treliske sits inside the Truro catchment — we cover both as one new build territory.
See New Builds in Truro →Other services in Treliske
Nearby places we cover
If you're considering a new build project in the TR1 area, our deep understanding of Treliske's architectural character can help navigate the process smoothly. bungalows in particular need a tailored structural answer.
Talk to a Cornwall studio that knows Treliske New Builds enquiries here usually start with a walk round.
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