Roseland · TR2
Design, planning and build for Philleigh loft conversion
A well-designed loft conversion adds a bedroom, an en-suite and useful storage to homes that were never built with the upper floor in mind — usually inside permitted development and almost always cheaper per square metre than extending sideways. What works on a TR2 plot rarely works elsewhere — Philleigh is a rural parish in the TR2 area, with farmsteads, lanes and scattered homes defining its built character, with a building stock that leans toward smallholdings and rural cottages.
Philleigh sits in Roseland — covering TR2 from Tregony, Ruan Lanihorne, Truro outward.
- Cornwall AONB
- Rural / open-countryside policy area
- ✓ Cornwall Council regulars across every sub-area
- ✓ AONB experience built into the fee
- ✓ Local to Roseland — not a national franchise
- ✓ Same team on paper as on site
Local proof — Most Philleigh homeowners come to us after a loft conversion quote elsewhere felt vague on planning — we lead with feasibility instead.
Get a free feasibility viewLocal context
Why Philleigh is its own job.
Cornwall Council's lens on Philleigh is consistent: open-countryside policy, access lanes, drainage and agricultural building history all need to be addressed before drawings go too far. For loft conversion specifically, 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 Philleigh project as a TR2-area job first — not a generic Cornwall job with a postcode bolted on. The smallholdings that dominate Philleigh (and continue out toward Truro) set the tone for any loft conversion scheme here.
Planning note
Most Cornish loft conversions are permitted development — but a Certificate of Lawfulness is worth the extra week and small fee for resale protection.
What we focus on
Loft Conversions considerations specific to Philleigh.
01
Stairs eat space — a loft conversion lives or dies by where the new staircase lands and what it costs you on the floor below.
02
Permitted development volume allowances are 40 cubic metres on a terrace and 50 on a detached or semi — but rear dormers in Conservation Areas often need full planning.
03
Cornish slate roofs come in a huge range of pitches — anything below a 30° pitch struggles to give usable headroom without raising the ridge.
04
Building regs require minimum 2.0 metre headroom over the stairs and 30-minute fire protection on the existing stair enclosure — both shape the design.
Our process
How a Philleigh loft conversion project runs.
Step 1
Feasibility
Roof, headroom, stair landing and structural assessment.
Step 2
Design
Layout options that respect the staircase, headroom and bathroom positioning.
Step 3
Approvals
Planning or permitted development confirmation, plus building regs.
Step 4
Build
Sequenced to keep the family living downstairs throughout most of the work.
Step 5
Handover
Finish, snag, certify, hand over the keys.
Loft conversions typically run six to eighteen weeks on site depending on type, with four to eight weeks of design and approvals beforehand.
Local fabric
Choosing a loft conversion team that actually knows TR2.
Building stock
Across Philleigh (TR2) we work on farmhouses, converted barns, rural cottages, smallholdings, scattered modern homes. Each stock type drives a different loft conversion response — smallholdings in particular needs careful detailing here.
Parish & policy
Philleigh sits in the parish of Philleigh, which matters for how parish-level consultation lands on a loft conversion application.
Coverage
We cover TR2 from our studio, with regular loft conversion jobs also running in Tregony, Ruan Lanihorne, Truro. Most Philleigh site visits get booked within the same week.
How quickly can you visit a Philleigh site?
Usually within the same week. Philleigh (TR2) is on our regular Roseland run, alongside Tregony, Ruan Lanihorne, Truro. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Philleigh Loft Conversions — local questions answered.
- Will I have enough headroom?
- We need a minimum 2.2 metres ridge-to-joist before alterations to make a usable conversion straightforward. Less than that and we'd consider raising the ridge, which is a planning conversation, not a permitted development one. In Philleigh specifically, we'd start by checking AONB landscape sensitivity before committing to a direction.
- Do I need planning permission for a loft conversion?
- Often no — most loft conversions sit inside permitted development on a typical Cornish house. Conservation Areas, AONB and properties on principal elevations need full planning, and we'll confirm at first review.
- Can I live downstairs while it's built?
- Yes — most loft conversions are built with the family staying in the house. There'll be a couple of disruptive days when the staircase comes through, but the bulk of the work is upstairs.
- Will it add value?
- An extra bedroom and bathroom typically adds noticeably more value than the build cost in most Cornish markets — but the value matters less than the daily use you'll get from the space.
- How much does a loft conversion cost?
- A simple Velux conversion starts around £30,000 in Cornwall; a rear dormer with en-suite typically runs £45,000 to £65,000; hip-to-gable and mansards more. Stair location and bathroom complexity drive most of the cost.
Philleigh is part of Tregony
Philleigh sits inside the Tregony catchment — we cover both as one loft conversion territory.
See Loft Conversions in Tregony →Other services in Philleigh
Nearby places we cover
Designing a loft conversion in Philleigh is as much about reading the parish as reading the brief; we do both, and the planning outcomes follow.