West Cornwall · TR26
Loft Conversions in St Ives
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. In St Ives, that work is shaped by the place itself — St Ives is a designated Area of Outstanding Natural Beauty town with a tightly packed historic harbour, the Tate gallery and some of the steepest streets in Cornwall, with a building stock that leans toward fishermen's cottages and granite terraces.
- Conservation Area
- Cornwall AONB
- Coastal exposure zone
Local context
Why St Ives is its own job.
St Ives operates a Neighbourhood Plan with a principal residence policy on most new dwellings — second homes and holiday lets face strong policy resistance. The Conservation Area covers Downalong, the harbour and most of the town centre, where granite, slate and lime-render detailing is non-negotiable. For loft conversion specifically, parts of St Ives 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 St Ives drives detailing choices — fixings, render systems and timber treatments all need to be specified for exposure. That's why we treat every St Ives project as a TR26-area job first — not a generic Cornwall job with a postcode bolted on.
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 St Ives.
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
Cut-roof Cornish properties are easier to convert than modern trussed roofs; the structural strategy varies completely.
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.
Our process
How a St Ives 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.
FAQs
St Ives Loft Conversions — common questions.
- 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. In St Ives specifically, we'd start by checking the Conservation Area boundary before committing to a direction.
- 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.
- 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.
Other services in St Ives
Nearby places we cover