South Cornwall · PL24
Design, planning and build for Tywardreath extension
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. A PL24 site visit comes before a Tywardreath sketch, every time — Tywardreath is a village above Par on the south coast, with a Norman church and a Conservation Area at the village core, with a building stock that leans toward modern infill and post-war estates.
Tywardreath sits in South Cornwall — covering PL24 from Fowey, Lostwithiel outward.
- Conservation Area
- Coastal exposure zone
- ✓ Conservation Area experience built into the fee
- ✓ One studio — design, planning and build under one roof
- ✓ Local to South Cornwall — not a national franchise
- ✓ Same team on paper as on site
Local proof — Our South Cornwall workload means a Tywardreath extension project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewLocal context
Why Tywardreath is its own job.
Cornwall Council's lens on Tywardreath is consistent: conservation Area covers the village including the church. Par Sands and Par Harbour to the south include china clay heritage and brownfield redevelopment opportunities. For extension specifically, parts of Tywardreath sit within a designated Conservation Area, which means materials, fenestration and roof pitches all need to read sympathetically with the existing streetscape; coastal salt-laden air around Tywardreath drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That's why we treat every Tywardreath project as a PL24-area job first — not a generic Cornwall job with a postcode bolted on. The modern infill that dominate Tywardreath (and continue out toward Lostwithiel) set the tone for any extension scheme here.
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 Tywardreath.
01
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
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.
Our process
How a Tywardreath 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
Why Tywardreath homeowners pick a local studio for extension.
Building stock
Across Tywardreath (PL24) we work on traditional cob and granite cottages, Victorian villas, Edwardian houses, post-war estates, modern infill. Each stock type drives a different extension response — modern infill in particular needs careful detailing here.
Parish & policy
Tywardreath is its own town in South Cornwall, with planning history that's specific to the PL24 catchment.
Coverage
We cover PL24 from our studio, with regular extension jobs also running in Fowey, Lostwithiel, Luxulyan. Most Tywardreath site visits get booked within the same week.
How quickly can you visit a Tywardreath site?
Usually within the same week. Tywardreath (PL24) is on our regular South Cornwall run, alongside Fowey, Lostwithiel, Luxulyan. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Tywardreath Extensions — local questions answered.
- 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. In Tywardreath specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- 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.
- 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.
Other services in Tywardreath
Nearby places we cover
Most Tywardreath extension enquiries start with one honest conversation about what's actually allowed — and that conversation costs nothing.