Full-height space and a proper window — the most popular loft choice.
Dormer loft conversion planning permission in Jersey.
A dormer loft conversion extends the roof with a vertical-fronted structure, creating full-height space and a window. Dormers are the most popular type of loft conversion in Jersey. We handle planning, structural engineering, and Bylaw Plus drawings.
- Free Initial Consultation
- All In-House — No Subcontractors
- Bylaw Plus — Builder-Ready Drawings
- Jersey Only Specialists
- Structural Engineering Included
What's Included
- Free consultation
- Planning drawings
- Planning application
- Structural engineering for dormer and floor
- Bylaw Plus drawings
- Bye-law application
How It Works
Consultation
We assess loft space, roof structure, and advise on dormer size and position relative to planning constraints.
Application
We design the dormer and submit the planning application.
Bylaw Plus
Full construction drawings for the dormer structure, floor, staircase, and insulation.
Planning Note
A dormer does not always need planning permission in Jersey. A small one can go ahead without an application if it meets every condition below — but most dormers people want are wider than 1.2 metres, and that is where permission comes in. Where an application is needed, rear dormers are generally viewed more favourably than front-facing ones. Building bye-law permission is needed for every dormer, whatever its size.
You will not need planning permission if all of these apply:
- The property is not listed, and the work is within its domestic curtilage
- Each dormer is no more than 1.2 metres wide, measured externally
- Every dormer is at least 1 metre from any boundary
- Two or more dormers on the same roof slope are at least 1 metre apart
- Any glazed face is at least 10 metres from a neighbouring boundary
- Dormers and rooflights together take up no more than half the roof
- Your permitted development rights were not removed by a condition on an earlier permission
Further reading
Frequently Asked Questions
Guides that go deeper
Loft Conversions we have taken through planning
Loft Conversion with Dormers
“Getting dormer windows approved in a strict area was never going to be simple. These guys knew the exact guidelines to reference in our application, which saved us months of going back and forth with the department.”
Roof Line Alteration
“Raising the roof ridge height to fit another bedroom seemed like a long shot. The 3D drawings provided to the planning committee showed it would not impact the street scene, and it worked.”
Velux Roof Lights
“Installing four roof lights into a sloping roof needed planning approval due to local conservation guidelines. The team handled the submission and gained approval within six weeks.”
Ready to start your dormer loft conversion project?
Free initial consultation. We advise on planning, costs, and timescales. Jersey only.