East Cornwall · PL17 · Cornwall Council East
Extensions Callington: PL17 planning, East Cornwall fabric
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. What works on a PL17 plot rarely works elsewhere — Callington is an East Cornwall market town between Liskeard and Tavistock, in the Tamar Valley AONB hinterland, with a substantial Georgian and Victorian core, with a building stock that leans toward post-war estates and Victorian terraces.
Callington sits in East Cornwall — just off the A38; covering PL17 from St Mellion, Stoke Climsland, Kelly Bray outward.
- Conservation Area
- ✓Free first site visit, no obligation
- ✓30+ years of Cornwall Council approvals
- ✓One studio — design, planning and build under one roof
- ✓Local to East Cornwall — not a national franchise
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Free Callington feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Who this is for
In Callington the extension brief is almost always a private homeowner improving a forever home — so we lead with feasibility and long-term value, not show-home rhetoric.
Local watch-list
Common Callington pitfalls we plan around.
Watch #1
Conservation Area controls on materials, window proportions and roof form through central Callington
Local proof — Our East Cornwall workload means a Callington extension project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewFAQs
Callington Extensions — local questions answered.
- 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. In Callington specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- 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.
- 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 an extension in Callington 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 Callington 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.
Quick check
Want a straight answer on whether your Callington 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 Callington and the PL17 area.
Page purpose
Drawings only, or drawings through to handover in Callington?
Both routes are open on a PL17 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Callington 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 PL17 scope, not as one opaque figure
Scope
Where our work starts and stops on a PL17 project
Not every project needs every stage. On a Callington job we scope to what the site and the consent route actually require.
Commercial drawings
Change of use, fit-out and access documentation for Class E and mixed-use premises.
Structural coordination
Calculations coordinated with the drawings so building control sees one consistent story.
Heritage and design statements
Written justification where designation makes the design case as important as the drawing.
Building regulation drawings
Full Plans sets with sections, construction notes and coordinated structural information.
Construction and technical drawings
1:10 and 1:20 details for the parts of the job builders normally have to guess at.
Who this is for
Our footing in East 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 an extension enquiry does not get passed between firms.
- Design and build are offered from the same studio, which means the person answering your Callington 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.
Keep reading
Related PL17 pages
Callington works as a hub for us: the same extension team covers Gunnislake and the surrounding PL17 villages, so a site visit here often takes in more than one address.
Local context
Why Callington is its own job.
Conservation Area covers Fore Street and the church area. Tamar Valley AONB lies to the east; significant edge-of-town residential development pressure from Plymouth commuters. That sets the scene before any design work begins. For extension specifically, parts of Callington sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape. It's the kind of detail that decides whether a Callington application gets approved at eight weeks or stalls in committee. The post-war estates that dominate Callington (and continue out toward Saltash) set the tone for any extension scheme here. On older stock, the practical constraint is usually joinery, render and roof line rather than the extension itself. We draw those details out early so an extension submission is not sent back for missing information. Confirm listing status with the local planning authority before assuming permitted development. On working land, the practical questions are usually track access for deliveries, foul drainage and how a new form sits in open landscape. General guidance only, so confirm your position with Cornwall Council before committing.
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.
What we focus on
Extensions considerations specific to Callington.
01
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
02
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.
03
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
04
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.
Our process
How a Callington 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.
Local fabric
Choosing an extension team that actually knows PL17.
Building stock
Across Callington (PL17) we work on Georgian townhouses, Victorian terraces, post-war estates, modern Persimmon and Bellway estates, barn conversions in the Tamar Valley. Each stock type drives a different extension response — post-war estates in particular needs careful detailing here.
Parish & policy
Callington is its own town in East Cornwall, with planning history that's specific to the PL17 catchment.
Coverage
We cover PL17 from our studio, with regular extension jobs also running in Gunnislake, Saltash. Most Callington site visits get booked within the same week.
How quickly can you visit a Callington site?
Usually within the same week. Callington (PL17) is on our regular East Cornwall run, alongside Gunnislake, Saltash. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitCallington is the hub for these neighbourhoods
We run extensions across Callington and the surrounding PL17 neighbourhoods — same studio, same site team.
- Gunnislake
PL18
Other services in Callington
If you're considering an extension project in the PL17 area, our deep understanding of Callington's architectural character can help navigate the process smoothly. Applications are dealt with through Cornwall Council, with Liskeard the office we deal with most for PL17.
Scope your Callington project stage by stage Extensions enquiries here usually start with a walk round.
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