South Cornwall · TR11
One studio for extension in Flushing
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. Flushing sits in South Cornwall, and that geography ends up in the drawings — Flushing is a creekside settlement in the TR11 area, with waterside homes, wooded valleys and narrow-lane access shaping the brief, with a building stock that leans toward waterside homes and detached houses.
Flushing sits in South Cornwall — covering TR11 from Falmouth, Budock Water, Swanpool outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓ One studio — design, planning and build under one roof
- ✓ Local to South Cornwall — not a national franchise
- ✓ Cornwall Council regulars across every sub-area
- ✓ Same team on paper as on site
Our process
How a Flushing 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 Flushing extension clients we work with are second-time builders — they've seen the templated approach fail once already.
Get a free feasibility viewWhat we focus on
Extensions considerations specific to Flushing.
01
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.
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
Cornish granite and slate-hung walls react differently to new openings than modern brickwork — lintel choice and structural sequencing matter.
04
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
Local context
Why Flushing is its own job.
Two things shape a Flushing application: parish character and policy. On policy — creekside ecology, flood risk, trees and views across the water often matter as much as the building form itself. For extension specifically, parts of Flushing 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 Flushing drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. Get that local reading right and the rest of the Flushing programme tends to run on time. On waterside homes in particular — the kind you'll also find toward Maenporth — 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 TR11 constraints that shape a extension brief.
Watch #1
Conservation Area material and fenestration controls in central Flushing
Watch #2
AONB landscape-impact scrutiny on visible elevations
Watch #3
Coastal exposure driving fixing, render and joinery spec
Flushing is part of Falmouth
Flushing sits inside the Falmouth catchment — we cover both as one extension territory.
See Extensions in Falmouth →Local fabric
Flushing extensions — the local-studio difference.
Building stock
Across Flushing (TR11) we work on creekside cottages, detached houses, boat sheds, converted barns, waterside homes. Each stock type drives a different extension response — waterside homes in particular needs careful detailing here.
Parish & policy
Flushing sits in the parish of Flushing, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover TR11 from our studio, with regular extension jobs also running in Falmouth, Budock Water, Swanpool. Most Flushing site visits get booked within the same week.
Can you handle both planning and build in Flushing?
Yes — design, planning, building regs and full construction run under one roof. For clients with an existing Flushing builder we can stop at a tender-ready Full Plans pack instead.
Request a free visitWho this is for
Flushing 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
Flushing Extensions — local questions answered.
- How much does an extension cost in Flushing?
- 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 Flushing 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.
- 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.
- 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.
Other services in Flushing
Nearby places we cover
Every Flushing extension we work on is treated as a TR11 job in its own right — local fabric, local policy, local builders.