Mid Cornwall · PL26 · Cornwall Council Mid
Design, planning and build for Roche structural calculations
Whenever a wall comes out, a roof is opened up or a new opening is formed, building control will want calculations showing that what is left holds up what is above it. We coordinate that work alongside the drawings so the beam on the calculation sheet is the beam on the drawing. What works on a PL26 plot rarely works elsewhere — 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 modern small estate development.
Roche sits in Mid Cornwall — just off the A390; covering PL26 from Bugle, St Austell outward.
- Conservation Area
- Rural / open-countryside policy area
- ✓30+ years of Cornwall Council approvals
- ✓Local to Mid Cornwall — not a national franchise
- ✓Same team on paper as on site
- ✓Fixed-fee planning packages, no surprise invoices
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Free Roche feasibility call
Tell us about your structural calculations. We reply within 1 working day — no obligation.
Local watch-list
Common Roche pitfalls we plan around.
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 structural calculations brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
Keep reading
Related PL26 pages
We cover Roche and the wider PL26 district directly. Structural Calculations enquiries here are common enough that we know the constraints before the first visit.
Who this is for
Our footing in Mid Cornwall
- Designated-area work is routine here, so heritage and landscape statements are produced alongside the drawings rather than outsourced.
- Drawings, planning and building regulations are all produced in-house, so a structural calculations enquiry does not get passed between firms.
- Design and build are offered from the same studio, which means the person answering your Roche 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.
Scope
Where our work starts and stops on a PL26 project
These stages can be bought separately. Most PL26 projects use three of them.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Heritage and design statements
Written justification where designation makes the design case as important as the drawing.
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.
Page purpose
What you actually get on a Roche structural calculations drawings package
This is a drawings-led service. You are buying a documented, submission-ready set for a PL26 address, not a build contract. For most Roche householders that means a measured survey, an honest feasibility view, then the drawings the council and your builder both need.
- Measured survey and existing drawings before any proposal is drawn
- A written planning route for the PL26 address, including whether permitted development is realistically available
- Proposed plans, elevations and site plan at the scales the authority expects
- Submission and validation handling, plus responses to officer queries
Local context
Why Roche is its own job.
Cornwall Council's lens on Roche is consistent: conservation Area covers the village core. Roche Rock SSSI and listed chapel, plus surrounding clay pits, shape most planning conversations. For structural calculations 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. That's why we treat every Roche project as a PL26-area job first — not a generic Cornwall job with a postcode bolted on. The traditional cob and granite cottages that dominate Roche (and continue out toward Lanivet) set the tone for any structural calculations scheme here. Where a property sits inside a conservation area or is listed, the assessment tends to turn on materials, window detailing and how visible the change is from the street rather than floor area alone. Cornwall Council's conservation team, or the Planning Portal, is the right place to confirm what applies to a specific address. Granite and cob walls do not behave like modern cavity construction. Breathability, damp movement and structural openings all need drawing properly, and building control will want that shown rather than assumed.
Planning note
Structural work does not usually need planning permission in itself, but a beam depth can change a ceiling line, and a changed ceiling line can change an approved elevation.
What we focus on
Structural Calculations considerations specific to Roche.
01
Cornish rubble stone walls behave differently to brick or block, and load paths through them have to be considered rather than assumed.
02
Where a party wall is affected, structural information is also what the neighbour's surveyor will ask to see.
03
Loft conversions almost always need new floor joists and a structural opening for the stair, both of which are calculated rather than sized by rule of thumb.
04
Ground conditions vary sharply across Cornwall, from granite close to the surface to soft made ground near estuaries, and foundation design follows the ground, not the pattern book.
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 structural calculations project runs.
Step 1
Establish the structure
A survey records what is load bearing, what spans where and what sits above.
Step 2
Brief the engineer
Drawings and loading assumptions are issued so calculations are done against real geometry.
Step 3
Calculate
Beams, bearings, foundations and stability are sized and checked.
Step 4
Coordinate onto drawings
Sizes and details come back onto the construction package.
Step 5
Submit and build
Building control receives one coordinated set and the builder installs what was calculated.
Work ranges from a single beam over a knocked through kitchen to a full structural scheme for a new build or a barn conversion.
FAQs
Roche Structural Calculations — local questions answered.
- We live in the house. Can a structural calculations 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.
- Can you do calculations for someone else's drawings?
- Yes, provided the drawings are accurate enough to work from. Where they are not, a measured survey check comes first. In Roche specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- Who carries out the calculations?
- They are produced by a qualified structural engineer, and we coordinate the information, the drawings and the submission so you are not managing two separate appointments.
- Do I need structural calculations to remove a wall?
- If the wall carries load, yes. Building control will ask for calculations before signing the work off, and a solicitor will ask for that sign off when the house is sold.
- Will a steel beam always be needed?
- Not always. Engineered timber can work well on shorter spans and is easier to install in a tight Cornish cottage, so the material choice follows the span, the loading and how the beam gets into the building.
- Are calculations included in a building regulation package?
- They are coordinated with it. We arrange the structural work and bring the results onto the drawings so building control receives one consistent set rather than two documents that disagree.
Local proof — We typically have one or two structural calculations jobs live in the PL26 area at any time, so the local planning officers know our drawings on sight.
Get a free feasibility viewOther services in Roche
Nearby places we cover
From initial feasibility to final handover, we manage structural calculations projects across Roche with careful attention to what makes Mid Cornwall unique. Here that means the Conservation Area boundary decides the route before the design does.
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