South Cornwall · PL23
Eco new builds in Fowey — sustainable spec that stacks up
An eco new-build in Fowey doesn't have to be Passivhaus-certified to make sense. Timber-frame construction, wood-fibre insulation, triple glazing and a properly sized air-source heat pump get you 85–90% of Passivhaus performance for a build premium under 6%. On PL23 plots, this is the pragmatic middle ground. A bespoke new build is the longest project we do, and the most rewarding. From plot appraisal through planning, building regulations and construction, you work with one team from the first sketch to the handover walk-round. Working in Fowey means starting from the PL23 context — 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 modern conversions of warehouses and lofts and Victorian villas.
Fowey sits in South Cornwall — covering PL23 from Polruan, Lostwithiel, Tywardreath outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓ Timber-frame with wood-fibre insulation
- ✓ ASHP + underfloor + PV as standard
- ✓ Under 6% cost premium
- ✓ Full building regs sign-off included
Local watch-list
Common Fowey pitfalls we plan around.
Watch #1
Conservation Area material and fenestration controls in central Fowey
Watch #2
AONB landscape-impact scrutiny on visible elevations
Watch #3
Coastal exposure driving fixing, render and joinery spec
Who this is for
Fowey runs the full mix — owner-occupier, holiday-let, commercial and the occasional smallholding — so we scope every new build enquiry from the use-class up.
Local context
Why Fowey is its own job.
In Fowey the planning picture is specific: 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 new build 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. That local reading is what makes a Fowey (PL23) project different from a generic Cornwall scheme — and is the whole reason we work this way. On modern conversions of warehouses and lofts in particular — the kind you'll also find toward Par — the new build brief always has to read the existing fabric first.
Planning note
Cornwall's planning policy on new dwellings is among the most restrictive in England outside Greater London. The first conversation should be a planning conversation, not a design one.
What we focus on
New Builds considerations specific to Fowey.
01
Cornwall's housing policy increasingly favours principal residence and replacement dwelling schemes over open-market new builds in some parishes.
02
AONB and Heritage Coast designations apply to large stretches of the county; isolated new builds outside settlement boundaries face a much higher policy bar.
03
Off-grid services — package treatment plants, borehole supply, off-mains gas — are common on rural Cornish plots and need designing, not assuming.
04
Replacement dwellings have specific volumetric tests — getting the ratio between existing footprint and proposed floor area right is the difference between approval and refusal.
Our process
How a Fowey new build project runs.
Step 1
Plot review
Site visit, planning history check, designation review and an honest feasibility verdict.
Step 2
Concept design
Sketches that test the plot in massing, orientation and approach before any drawings are committed.
Step 3
Planning
Pre-app, full planning, consultee management and condition discharge.
Step 4
Technical design and build prep
Building regs, structural design, services strategy and contractor procurement.
Step 5
Construction and handover
Build delivered under contract administration with regular client reviews.
Most bespoke new builds run eighteen to thirty months from instruction to keys, depending on site, planning route and build complexity.
FAQs
Fowey New Builds — local questions answered.
- Is timber-frame or block best for eco in Fowey?
- Timber-frame nearly every time — lower embodied carbon, faster on-site programme, better air-tightness detailing. The exception is exposed coastal plots where masonry may still win on maintenance.
- What eco heating works in Fowey?
- Air-source heat pump with underfloor heating downstairs, radiators upstairs. Ground-source only makes sense on plots with borehole space. PV on the roof pays back in 9–12 years at current rates.
- Does eco spec add much cost?
- £3,200–£4,200/m² for sensible eco spec vs £3,000–£4,000 standard. Under 6% premium for major improvements in comfort and running cost.
- What's a replacement dwelling and is mine eligible?
- If a habitable dwelling exists on the plot, you can often replace it — within volumetric and design constraints set by Cornwall's Local Plan. Derelict structures sometimes qualify, sometimes don't, depending on lawful use history. In Fowey specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- How long does the whole project take?
- Allow six to twelve months for design and approvals, then ten to fourteen months on site for a typical four-bedroom new build. Complex sites or long planning routes extend that.
- What about utilities, drainage and access?
- All designed and applied for as part of the package — water, electric, off-mains drainage where mains isn't viable, and highways access agreement with Cornwall Council where required.
Fowey is the hub for these neighbourhoods
We run new builds across Fowey and the surrounding PL23 neighbourhoods — same studio, same site team.
Local proof — Recent new build enquiries from Fowey have clustered around modern conversions of warehouses and lofts — we know the route through Cornwall Council on these.
Get a free feasibility viewOther services in Fowey
Nearby places we cover
Not every Fowey eco home needs full Passivhaus certification — sensibly specified timber-frame with the right envelope gets most of the benefit for a fraction of the premium.
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