Roseland · TR2
Design, planning and build for Ruan Lanihorne 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. What works on a TR2 plot rarely works elsewhere — Ruan Lanihorne is a creekside settlement in the TR2 area, with waterside homes, wooded valleys and narrow-lane access shaping the brief, with a building stock that leans toward waterside homes and converted barns.
Ruan Lanihorne sits in Roseland — covering TR2 from Tregony, Philleigh, Truro outward.
- Conservation Area
- Cornwall AONB
- Rural / open-countryside policy area
- ✓ 30+ years of Cornwall Council approvals
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
- ✓ Local to Roseland — not a national franchise
Local proof — Most Ruan Lanihorne homeowners come to us after a extension quote elsewhere felt vague on planning — we lead with feasibility instead.
Get a free feasibility viewLocal context
Why Ruan Lanihorne is its own job.
Cornwall Council's lens on Ruan Lanihorne is consistent: creekside ecology, flood risk, trees and views across the water often matter as much as the building form itself. For extension specifically, parts of Ruan Lanihorne 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; 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. That's why we treat every Ruan Lanihorne project as a TR2-area job first — not a generic Cornwall job with a postcode bolted on. The waterside homes that dominate Ruan Lanihorne (and continue out toward Truro) 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 Ruan Lanihorne.
01
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.
02
Wind and sea-spray exposure can drive material choices on west-facing extensions; we detail accordingly.
03
Drainage on older Cornish properties is rarely on a clean modern map; CCTV survey before design is often money well spent.
Our process
How a Ruan Lanihorne 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 a Roseland studio is the right fit for Ruan Lanihorne extension.
Building stock
Across Ruan Lanihorne (TR2) 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
Ruan Lanihorne sits in the parish of Ruan Lanihorne, which matters for how parish-level consultation lands on a extension application.
Coverage
We cover TR2 from our studio, with regular extension jobs also running in Tregony, Philleigh, Truro. Most Ruan Lanihorne site visits get booked within the same week.
How quickly can you visit a Ruan Lanihorne site?
Usually within the same week. Ruan Lanihorne (TR2) is on our regular Roseland run, alongside Tregony, Philleigh, Truro. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Ruan Lanihorne Extensions — local questions answered.
- 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. In Ruan Lanihorne specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- 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.
- 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.
- 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.
Ruan Lanihorne is part of Tregony
Ruan Lanihorne sits inside the Tregony catchment — we cover both as one extension territory.
See Extensions in Tregony →Other services in Ruan Lanihorne
Nearby places we cover
Designing a extension in Ruan Lanihorne is as much about reading the parish as reading the brief; we do both, and the planning outcomes follow.