Mid Cornwall · PL26 · Cornwall Council Mid
Loft Conversions in Roche
A well-designed loft conversion adds a bedroom, an en-suite and useful storage to homes that were never built with the upper floor in mind — usually inside permitted development and almost always cheaper per square metre than extending sideways. A Roche brief starts on the street, not the screen — Roche is a village in the heart of china clay country with the dramatic Roche Rock and St Michael's Chapel on its outskirts, a fifteenth-century parish church and a tight Conservation Area, with a building stock that leans toward traditional cob and granite cottages and Edwardian houses.
Roche sits in Mid Cornwall — just off the A390; covering PL26 from Bugle, St Austell outward.
- Conservation Area
- Rural / open-countryside policy area
- ✓Local to Mid Cornwall — not a national franchise
- ✓Same team on paper as on site
- ✓Fixed-fee planning packages, no surprise invoices
- ✓Measured-survey accuracy from day one
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Tell us about your loft conversion. We reply within 1 working day — no obligation.
Local watch-list
Local snags worth knowing before drawing a Roche loft conversion.
Watch #1
Conservation Area controls on materials, window proportions and roof form through central Roche
Watch #2
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around Roche
Watch #3
Party Wall notices and shallow roof voids typical of traditional cob and granite cottages in the PL26 district
Who this is for
In Roche the loft conversion brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
Scope
The parts of the job we can take on in Roche
Not every project needs every stage. On a Roche 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.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Planning application drawings
Existing and proposed plans, elevations, site and block plans drawn to validation standard.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
Heritage and design statements
Written justification where designation makes the design case as important as the drawing.
Who this is for
What we can genuinely back up in Roche
- Design and build are offered from the same studio, which means the person answering your Roche questions has seen the detail built.
- Drawings, planning and building regulations are all produced in-house, so a loft conversion enquiry does not get passed between firms.
- Designated-area work is routine here, so heritage and landscape statements are produced alongside the drawings rather than outsourced.
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
Other work we do around Roche
We cover Roche and the wider PL26 district directly. Loft Conversions enquiries here are common enough that we know the constraints before the first visit.
Page purpose
Drawings only, or drawings through to handover in Roche?
Both routes are open on a PL26 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Roche 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 PL26 scope, not as one opaque figure
Local context
Why Roche is its own job.
Conservation Area covers the village core. Roche Rock SSSI and listed chapel, plus surrounding clay pits, shape most planning conversations. For loft conversion specifically, parts of Roche sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape; 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. So every Roche job runs as a PL26-specific piece of work — local policy, local fabric, local builders. Most of our loft conversion work in Roche lands on traditional cob and granite cottages, with detailing that has to nod to the wider St Austell streetscape.
Planning note
Most Cornish loft conversions are permitted development — but a Certificate of Lawfulness is worth the extra week and small fee for resale protection.
What we focus on
Loft Conversions considerations specific to Roche.
01
Permitted development volume allowances are 40 cubic metres on a terrace and 50 on a detached or semi — but rear dormers in Conservation Areas often need full planning.
02
Building regs require minimum 2.0 metre headroom over the stairs and 30-minute fire protection on the existing stair enclosure — both shape the design.
03
Cornish slate roofs come in a huge range of pitches — anything below a 30° pitch struggles to give usable headroom without raising the ridge.
Quick check
Want a straight answer on whether your Roche 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 Roche and the PL26 area.
Our process
How a Roche loft conversion project runs.
Step 1
Feasibility
Roof, headroom, stair landing and structural assessment.
Step 2
Design
Layout options that respect the staircase, headroom and bathroom positioning.
Step 3
Approvals
Planning or permitted development confirmation, plus building regs.
Step 4
Build
Sequenced to keep the family living downstairs throughout most of the work.
Step 5
Handover
Finish, snag, certify, hand over the keys.
Loft conversions typically run six to eighteen weeks on site depending on type, with four to eight weeks of design and approvals beforehand.
FAQs
Roche Loft Conversions — local questions answered.
- How much does a loft conversion cost?
- A simple Velux conversion starts around £30,000 in Cornwall; a rear dormer with en-suite typically runs £45,000 to £65,000; hip-to-gable and mansards more. Stair location and bathroom complexity drive most of the cost. In Roche specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- We live in the house. Can a loft conversion in Roche 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 Roche are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- How long does a loft conversion take?
- Allow six to ten weeks on site for a Velux conversion, eight to fourteen weeks for a dormer, twelve to eighteen weeks for hip-to-gable. Add four to eight weeks for design and regs beforehand.
- Will it add value?
- An extra bedroom and bathroom typically adds noticeably more value than the build cost in most Cornish markets — but the value matters less than the daily use you'll get from the space.
- Can I live downstairs while it's built?
- Yes — most loft conversions are built with the family staying in the house. There'll be a couple of disruptive days when the staircase comes through, but the bulk of the work is upstairs.
- Will I have enough headroom?
- We need a minimum 2.2 metres ridge-to-joist before alterations to make a usable conversion straightforward. Less than that and we'd consider raising the ridge, which is a planning conversation, not a permitted development one.
Local proof — Recent loft conversion enquiries from Roche have clustered around traditional cob and granite cottages — we know the route through Cornwall Council on these.
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Nearby places we cover
Whichever route suits your PL26 project, the survey and feasibility work is the same, so nothing is wasted. Here that means the Conservation Area boundary decides the route before the design does.
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