South Cornwall · PL23 · Cornwall Council Central
House Extensions in Fowey
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 Fowey version of this work has its own character — Fowey is a deep-water harbour town on the river of the same name, with a literary heritage tied to Daphne du Maurier and one of Cornwall's strongest period property markets, with a building stock that leans toward Victorian villas and modern conversions of warehouses and lofts.
Fowey sits in South Cornwall — just off the A39; covering PL23 from Polruan, Lostwithiel, Tywardreath outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓Local to South Cornwall — not a national franchise
- ✓Same team on paper as on site
- ✓Fixed-fee planning packages, no surprise invoices
- ✓Measured-survey accuracy from day one
Free · No obligation
Free Fowey feasibility call
Tell us about your extension. We reply within 1 working day — no obligation.
Our process
How a Fowey 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 — Most Fowey homeowners come to us after a extension quote elsewhere felt vague on planning — we lead with feasibility instead.
Get a free feasibility viewScope
The parts of the job we can take on in Fowey
Clients in Fowey take different slices of this list, and that is deliberate.
Measured survey
An accurate record of what is actually there, which is where most avoidable cost is removed.
Heritage and design statements
Written justification where designation makes the design case as important as the drawing.
Structural coordination
Calculations coordinated with the drawings so building control sees one consistent story.
Full design and build
One contract from first sketch to handover, with the same team on paper and on site.
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
What we can genuinely back up in Fowey
- Design and build are offered from the same studio, which means the person answering your Fowey questions has seen the detail built.
- Drawings, planning and building regulations are all produced in-house, so a extension enquiry does not get passed between firms.
- Designated-area work is routine here, so heritage and landscape statements are produced alongside the drawings rather than outsourced.
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
Other work we do around Fowey
Fowey works as a hub for us: the same extension team covers Polruan, Golant, Bodinnick and the surrounding PL23 villages, so a site visit here often takes in more than one address.
Page purpose
Drawings only, or drawings through to handover in Fowey?
Both routes are open on a PL23 project, and the honest answer depends on whether you already have a builder you trust. Plenty of Fowey 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 PL23 scope, not as one opaque figure
Quick check
Want a straight answer on whether your Fowey 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.
Free · No obligation
Get a free feasibility view
For projects in Fowey and the PL23 area.
What we focus on
Extensions considerations specific to Fowey.
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
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 Fowey is its own job.
Fowey Conservation Area is extensive, covering the harbour, Fore Street and Esplanade. AONB and Heritage Coast across the parish; views to and from the river dictate massing and ridge heights. For extension specifically, parts of Fowey sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape; the surrounding landscape falls inside the Cornwall Area of Outstanding Natural Beauty, so massing, height and landscape impact carry extra weight in any planning decision; coastal salt-laden air around Fowey drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. So every Fowey job runs as a PL23-specific piece of work — local policy, local fabric, local builders. Most of our extension work in Fowey lands on Victorian villas, with detailing that has to nod to the wider Lostwithiel streetscape.
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
Fowey-specific issues we screen on the first visit.
Watch #1
Conservation Area controls on materials, window proportions and roof form through central Fowey
Watch #2
AONB landscape-impact testing on anything read in long views across South Cornwall
Watch #3
Exposure detailing on medieval and Georgian merchants' houses — fixings, render systems and joinery specified for salt-laden air
Fowey is the hub for these neighbourhoods
We run extensions across Fowey and the surrounding PL23 neighbourhoods — same studio, same site team.
Local fabric
What sets a Fowey extension brief apart.
Building stock
Across Fowey (PL23) we work on medieval and Georgian merchants' houses, Victorian villas, Edwardian seafront houses, modern conversions of warehouses and lofts. Each stock type drives a different extension response — Victorian villas in particular needs careful detailing here.
Parish & policy
Fowey is its own town in South Cornwall, with planning history that's specific to the PL23 catchment.
Coverage
We cover PL23 from our studio, with regular extension jobs also running in Polruan, Lostwithiel, Tywardreath. Most Fowey site visits get booked within the same week.
Do you work in Fowey regularly?
Yes — Fowey and the wider PL23 catchment are core territory. We're typically on a South Cornwall site at least once a week, so logistics are baked in, not bolted on.
Request a free visitWho this is for
In Fowey 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.
FAQs
Fowey Extensions — local questions answered.
- How much does an extension cost in Fowey?
- 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 Fowey specifically, we'd start by checking the Conservation Area boundary 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.
- 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.
- We live in the house. Can a extension in Fowey 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 Fowey are often easier if you move out for a few weeks. We set that expectation at feasibility stage rather than halfway through.
- 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.
Other services in Fowey
Nearby places we cover
A extension in Fowey stands or falls on how well it reads the street — we treat that as the design brief, not an afterthought. Here that means the Conservation Area boundary decides the route before the design does.
Walk us round your Fowey site — free first visit Most Fowey visits happen within the week.
Free · No obligation
Book a free visit in Fowey
No obligation. Reply usually same working day.