East Cornwall · PL17
One studio for extension in Golberdon
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 Golberdon starts with a measured walk-round — Golberdon is a rural parish in the PL17 area, with farmsteads, lanes and scattered homes defining its built character, with a building stock that leans toward converted barns and smallholdings.
Golberdon sits in East Cornwall — covering PL17 from Callington, Stoke Climsland, Linkinhorne outward.
- Rural / open-countryside policy area
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
- ✓ Cornwall Council regulars across every sub-area
- ✓ Free first site visit, no obligation
Our process
How a Golberdon 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 proof — We typically have one or two extension jobs live in the PL17 area at any time, so the local planning officers know our drawings on sight.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Golberdon.
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.
Local context
Why Golberdon is its own job.
Two things shape a Golberdon 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 Golberdon programme tends to run on time. On converted barns in particular — the kind you'll also find toward Calstock — 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.
Local watch-list
The PL17 constraints that shape a extension brief.
Watch #1
Tighter Local Plan tests on isolated rural dwellings
Golberdon is part of Callington
Golberdon sits inside the Callington catchment — we cover both as one extension territory.
See Extensions in Callington →Local fabric
Golberdon extensions — the local-studio difference.
Building stock
Across Golberdon (PL17) we work on farmhouses, converted barns, rural cottages, smallholdings, scattered modern homes. Each stock type drives a different extension response — converted barns in particular needs careful detailing here.
Parish & policy
Golberdon sits in the parish of Golberdon, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover PL17 from our studio, with regular extension jobs also running in Callington, Stoke Climsland, Linkinhorne. Most Golberdon site visits get booked within the same week.
Can you handle both planning and build in Golberdon?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Golberdon builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Golberdon runs the full mix — owner-occupier, holiday-let, commercial and the occasional smallholding — so we scope every extension enquiry from the use-class up.
FAQs
Golberdon Extensions — local questions answered.
- How much does an extension cost in Golberdon?
- 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 Golberdon 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.
- 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.
- 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.
Other services in Golberdon
Nearby places we cover
The PL17 stretch of East Cornwall has its own rhythm; our extension work respects it, and Cornwall Council usually responds in kind.