North Cornwall · PL28
Design, planning and build for Harlyn 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 PL28 site visit comes before a Harlyn sketch, every time — Harlyn is a holiday-coast settlement in the PL28 area, with strong second-home demand and exposed coastal building conditions, with a building stock that leans toward holiday lets and coastal bungalows.
Harlyn sits in North Cornwall — covering PL28 from Padstow, St Eval, Trevone outward.
- Cornwall AONB
- Coastal exposure zone
- ✓ 30+ years of Cornwall Council approvals
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
- ✓ Local to North Cornwall — not a national franchise
Local proof — Our North Cornwall workload means a Harlyn loft conversion project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewLocal context
Why Harlyn is its own job.
Cornwall Council's lens on Harlyn is consistent: planning scrutiny often focuses on visual impact, occupancy, parking, overlooking and whether replacement buildings respect the coastal edge. 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; coastal salt-laden air around Harlyn drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That's why we treat every Harlyn project as a PL28-area job first — not a generic Cornwall job with a postcode bolted on. The holiday lets that dominate Harlyn (and continue out toward Trevone) 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 Harlyn.
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
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.
04
Cornish slate roofs come in a huge range of pitches — anything below a 30° pitch struggles to give usable headroom without raising the ridge.
Our process
How a Harlyn 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 Harlyn homeowners pick a local studio for loft conversion.
Building stock
Across Harlyn (PL28) we work on coastal bungalows, holiday lets, second homes, detached houses, replacement dwellings. Each stock type drives a different loft conversion response — holiday lets in particular needs careful detailing here.
Parish & policy
Harlyn sits in the parish of Harlyn, which matters for how parish-level consultation lands on a loft conversion application.
Coverage
We cover PL28 from our studio, with regular loft conversion jobs also running in Padstow, St Eval, Trevone. Most Harlyn site visits get booked within the same week.
How quickly can you visit a Harlyn site?
Usually within the same week. Harlyn (PL28) is on our regular North Cornwall run, alongside Padstow, St Eval, Trevone. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Harlyn 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 Harlyn 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.
Harlyn is part of Padstow
Harlyn sits inside the Padstow catchment — we cover both as one loft conversion territory.
See Loft Conversions in Padstow →Other services in Harlyn
Nearby places we cover
Most Harlyn loft conversion enquiries start with one honest conversation about what's actually allowed — and that conversation costs nothing.