Lizard Peninsula · TR12
Design, planning and build for Gunwalloe 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. A TR12 site visit comes before a Gunwalloe sketch, every time — Gunwalloe is a coastal village in the TR12 area, where sea exposure, views and seasonal pressure shape most building decisions, with a building stock that leans toward rendered coastal houses and granite cottages.
Gunwalloe sits in Lizard Peninsula — covering TR12 from Mullion, Cury, Predannack outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓ Cornwall Council regulars across every sub-area
- ✓ Same team on paper as on site
- ✓ Fixed-fee planning packages, no surprise invoices
- ✓ Measured-survey accuracy from day one
Local proof — Recent loft conversion enquiries from Gunwalloe have clustered around rendered coastal houses — we know the route through Cornwall Council on these.
Get a free feasibility viewLocal context
Why Gunwalloe is its own job.
Cornwall Council's lens on Gunwalloe is consistent: coastal setting and landscape sensitivity mean rooflines, glazing, drainage and external materials need careful handling from the first sketch. For loft conversion specifically, parts of Gunwalloe 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 Gunwalloe drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That's why we treat every Gunwalloe project as a TR12-area job first — not a generic Cornwall job with a postcode bolted on. The rendered coastal houses that dominate Gunwalloe (and continue out toward Predannack) 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 Gunwalloe.
01
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.
02
Stairs eat space — a loft conversion lives or dies by where the new staircase lands and what it costs you on the floor below.
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
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.
Our process
How a Gunwalloe 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
Why a Lizard Peninsula studio is the right fit for Gunwalloe loft conversion.
Building stock
Across Gunwalloe (TR12) we work on granite cottages, rendered coastal houses, holiday homes, bungalows, replacement dwellings. Each stock type drives a different loft conversion response — rendered coastal houses in particular needs careful detailing here.
Parish & policy
Gunwalloe sits in the parish of Gunwalloe, which matters for how parish-level consultation lands on a loft conversion application.
Coverage
We cover TR12 from our studio, with regular loft conversion jobs also running in Mullion, Cury, Predannack. Most Gunwalloe site visits get booked within the same week.
How quickly can you visit a Gunwalloe site?
Usually within the same week. Gunwalloe (TR12) is on our regular Lizard Peninsula run, alongside Mullion, Cury, Predannack. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Gunwalloe Loft Conversions — local questions answered.
- 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. In Gunwalloe specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- 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.
- 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.
- 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.
- How long does a loft conversion take?
- Allow six to ten weeks on site for a Velux conversion, eight to fourteen weeks for a dormer, twelve to eighteen weeks for hip-to-gable. Add four to eight weeks for design and regs beforehand.
Gunwalloe is part of Mullion
Gunwalloe sits inside the Mullion catchment — we cover both as one loft conversion territory.
See Loft Conversions in Mullion →Other services in Gunwalloe
Nearby places we cover
Most Gunwalloe loft conversion enquiries start with one honest conversation about what's actually allowed — and that conversation costs nothing.