South Cornwall · PL26
Design, planning and build for Mevagissey 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. Every Mevagissey project we take on begins with reading the local context — Mevagissey is a working fishing port south of St Austell, with the second-busiest fishing fleet in Cornwall and an exceptionally dense Conservation Area of slate-hung cottages around its inner and outer harbours, with a building stock that leans toward Edwardian guesthouses and Victorian terraces above the harbour.
Mevagissey sits in South Cornwall — covering PL26 from Gorran Haven, Mevagissey, St Austell outward.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
- ✓ 30+ years of Cornwall Council approvals
- ✓ Plain-English feasibility before any drawings
- ✓ Measured-survey accuracy from day one
- ✓ One studio — design, planning and build under one roof
Local proof — Our South Cornwall workload means a Mevagissey loft conversion project never has to wait for an out-of-county team to drive down.
Get a free feasibility viewLocal context
Why Mevagissey is its own job.
Cornwall Council's lens on Mevagissey is consistent: conservation Area covers the entire historic harbour area; AONB across most of the parish. Slate-hung walls and traditional sash windows are the design baseline; modern alterations face high scrutiny. For loft conversion specifically, parts of Mevagissey 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 Mevagissey drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That's why we treat every Mevagissey project as a PL26-area job first — not a generic Cornwall job with a postcode bolted on. The Edwardian guesthouses that dominate Mevagissey (and continue out toward Mevagissey) 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 Mevagissey.
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
Cut-roof Cornish properties are easier to convert than modern trussed roofs; the structural strategy varies completely.
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 Mevagissey 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 South Cornwall studio is the right fit for Mevagissey loft conversion.
Building stock
Across Mevagissey (PL26) we work on slate-hung fishermen's cottages, Victorian terraces above the harbour, Edwardian guesthouses, modern infill on the village fringes. Each stock type drives a different loft conversion response — Edwardian guesthouses in particular needs careful detailing here.
Parish & policy
Mevagissey is its own town in South Cornwall, with planning history that's specific to the PL26 catchment.
Coverage
We cover PL26 from our studio, with regular loft conversion jobs also running in Gorran Haven, Mevagissey, St Austell. Most Mevagissey site visits get booked within the same week.
How quickly can you visit a Mevagissey site?
Usually within the same week. Mevagissey (PL26) is on our regular South Cornwall run, alongside Gorran Haven, Mevagissey, St Austell. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
Mevagissey 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 Mevagissey 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.
Other services in Mevagissey
Nearby places we cover
To sum up, our loft conversion approach in Mevagissey is built entirely around local Cornwall context, ensuring the best possible outcome for your property.