Mid Cornwall · PL30 · Cornwall Council Mid
One studio for extension in Lanlivery
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. Working in Lanlivery means starting from the PL30 context — Lanlivery is a rural parish in the PL30 area, with farmsteads, lanes and scattered homes defining its built character, with a building stock that leans toward rural cottages and scattered modern homes.
Lanlivery sits in Mid Cornwall — just off the A390; covering PL30 from Lostwithiel, Lerryn, St Winnow outward.
- Rural / open-countryside policy area
- ✓One studio — design, planning and build under one roof
- ✓Local to Mid Cornwall — not a national franchise
- ✓Fixed-fee planning packages, no surprise invoices
- ✓Measured-survey accuracy from day one
Free · No obligation
Free Lanlivery 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 Lanlivery?
Both routes are open on a PL30 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Lanlivery 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 PL30 scope, not as one opaque figure
Scope
Scope options for Lanlivery clients
These stages can be bought separately. Most PL30 projects use three of them.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
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.
Local watch-list
What usually catches extension projects out in Lanlivery.
Watch #1
Local Plan tests on isolated dwellings, plus lane access for plant and deliveries around Lanlivery
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 Lanlivery 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 Lanlivery 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 Lanlivery.
01
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
02
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.
03
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.
04
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
Quick check
Want a straight answer on whether your Lanlivery 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 Lanlivery and the PL30 area.
Local context
Why Lanlivery is its own job.
Two things shape a Lanlivery application: parish character and policy. On policy — open-countryside policy, access lanes, drainage and agricultural building history all need to be addressed before drawings go too far. 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 Lanlivery programme tends to run on time. On rural cottages in particular — the kind you'll also find toward Sweetshouse — 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 Lanlivery 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
Lanlivery Extensions — local questions answered.
- How much does an extension cost in Lanlivery?
- 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. In Lanlivery specifically, we'd start by checking the latest parish-level planning history before committing to a direction.
- 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.
- 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.
- We live in the house. Can a extension in Lanlivery 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 Lanlivery are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- Do I need planning permission for an extension?
- Often no — single-storey rear extensions, side extensions and modest two-storey additions can sit inside permitted development on a typical detached house. Conservation Areas, AONB and Article 4 zones remove some of those rights, so we always check the address first.
- 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.
Lanlivery is part of Lostwithiel
Lanlivery sits inside the Lostwithiel catchment — we cover both as one extension territory.
See Extensions in Lostwithiel →Keep reading
Where to go next from Lanlivery
Lanlivery is covered from our Lostwithiel 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 Lanlivery
Nearby places we cover
On a Lanlivery site the success of a extension is decided in week one — by reading the constraints right, not by drawing them away. converted barns in particular need a tailored structural answer.
Drawings only, or the full Lanlivery build? Bring the deeds, we will bring the survey kit for the extension.
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