Mid Cornwall · TR2 · Cornwall Council Mid
One studio for extension in St Michael Penkivel
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. The way we approach extension in St Michael Penkivel starts with a measured walk-round — St Michael Penkivel is an estate-influenced village in the TR2 area, with designed landscape, older cottages and rural edges close together, with a building stock that leans toward small infill plots and farm buildings.
St Michael Penkivel sits in Mid Cornwall — just off the A390; covering TR2 from Truro, Calenick, Malpas outward.
- Rural / open-countryside policy area
- ✓Local to Mid Cornwall — not a national franchise
- ✓Same team on paper as on site
- ✓Measured-survey accuracy from day one
- ✓One studio — design, planning and build under one roof
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Free St Michael Penkivel feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Page purpose
Drawings only, or drawings through to handover in St Michael Penkivel?
Both routes are open on a TR2 project, and the honest answer depends on whether you already have a builder you trust. Plenty of St Michael Penkivel 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 TR2 scope, not as one opaque figure
Scope
Scope options for St Michael Penkivel clients
Not every project needs every stage. On a St Michael Penkivel job we scope to what the site and the consent route actually require.
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.
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.
Construction and technical drawings
1:10 and 1:20 details for the parts of the job builders normally have to guess at.
Local watch-list
Local snags worth knowing before drawing a St Michael Penkivel extension.
Watch #1
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around St Michael Penkivel
Watch #2
Party Wall notices and shallow roof voids typical of estate cottages in the TR2 district
Watch #3
Trussed roofs and shallow foundations in the later TR2 estates, which change the structural strategy
Who this is for
Straight facts about working with us here
- Drawings, planning and building regulations are all produced in-house, so a extension enquiry does not get passed between firms.
- Applications for St Michael Penkivel 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 St Michael Penkivel 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.
What we focus on
Extensions considerations specific to St Michael Penkivel.
01
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
02
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
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.
Quick check
Want a straight answer on whether your St Michael Penkivel 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 St Michael Penkivel and the TR2 area.
Local context
Why St Michael Penkivel is its own job.
Two things shape a St Michael Penkivel application: parish character and policy. On policy — landscape setting, curtilage history and estate character need a precise design rationale rather than a standard suburban approach. 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. Get that local reading right and the rest of the St Michael Penkivel programme tends to run on time. On small infill plots in particular — the kind you'll also find toward Kea — the extension brief always has to read the existing fabric first.
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.
Our process
How a St Michael Penkivel 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.
FAQs
St Michael Penkivel Extensions — local questions answered.
- 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. In St Michael Penkivel specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- We live in the house. Can a extension in St Michael Penkivel 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 St Michael Penkivel are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- How much does an extension cost in Cornwall?
- Build costs in Cornwall typically run from around £2,200 to £3,200 per square metre for a good-quality single-storey extension, more for kitchen-grade fit-out or complex glazing. We give a realistic budget before drawings start, not after.
- 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.
- 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.
- 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.
St Michael Penkivel is part of Truro
St Michael Penkivel sits inside the Truro catchment — we cover both as one extension territory.
See Extensions in Truro →Keep reading
Where to go next from St Michael Penkivel
St Michael Penkivel 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.
Other services in St Michael Penkivel
Nearby places we cover
To sum up, our extension approach in St Michael Penkivel is built entirely around local Cornwall context, ensuring the best possible outcome for your property. farm buildings in particular need a tailored structural answer.
Drawings only, or the full St Michael Penkivel build? Bring the deeds, we will bring the survey kit for the extension.
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