Mid Cornwall · PL26
Design, planning and build for London Apprentice 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 PL26 site visit comes before a London Apprentice sketch, every time — London Apprentice is a creekside settlement in the PL26 area, with waterside homes, wooded valleys and narrow-lane access shaping the brief, with a building stock that leans toward detached houses and creekside cottages.
London Apprentice sits in Mid Cornwall — covering PL26 from St Austell, Bugle, St Dennis outward.
- Rural / open-countryside policy area
- ✓ 30+ years of Cornwall Council approvals
- ✓ Plain-English feasibility before any drawings
- ✓ Local to Mid Cornwall — not a national franchise
- ✓ Same team on paper as on site
Local proof — Most London Apprentice 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 London Apprentice is its own job.
Cornwall Council's lens on London Apprentice is consistent: creekside ecology, flood risk, trees and views across the water often matter as much as the building form itself. For loft conversion specifically, 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 London Apprentice project as a PL26-area job first — not a generic Cornwall job with a postcode bolted on. The detached houses that dominate London Apprentice (and continue out toward St Dennis) 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 London Apprentice.
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 London Apprentice 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 London Apprentice homeowners pick a local studio for loft conversion.
Building stock
Across London Apprentice (PL26) we work on creekside cottages, detached houses, boat sheds, converted barns, waterside homes. Each stock type drives a different loft conversion response — detached houses in particular needs careful detailing here.
Parish & policy
London Apprentice sits in the parish of London Apprentice, which matters for how parish-level consultation lands on a loft conversion application.
Coverage
We cover PL26 from our studio, with regular loft conversion jobs also running in St Austell, Bugle, St Dennis. Most London Apprentice site visits get booked within the same week.
How quickly can you visit a London Apprentice site?
Usually within the same week. London Apprentice (PL26) is on our regular Mid Cornwall run, alongside St Austell, Bugle, St Dennis. First visits are free and you'll get an honest feasibility view inside seven days.
Request a free visitFAQs
London Apprentice 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 London Apprentice specifically, we'd start by checking the latest parish-level planning history 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.
- 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.
London Apprentice is part of St Austell
London Apprentice sits inside the St Austell catchment — we cover both as one loft conversion territory.
See Loft Conversions in St Austell →Other services in London Apprentice
Nearby places we cover
Most London Apprentice loft conversion enquiries start with one honest conversation about what's actually allowed — and that conversation costs nothing.