Permitted Development Rights in Jersey

If you have read a UK guide about extending your home without planning permission, put it aside. It does not apply here.

Jersey has its own planning legislation, and its permitted development rights are considerably narrower than those in England and Wales. Work that a homeowner in Hampshire could start on Monday morning without telling anybody will, in Jersey, often need a full application. This is the single most common misunderstanding we encounter.

Why Jersey is different

Planning in Jersey is governed by the Planning and Building (Jersey) Law 2002 and the Island Plan, not by the English planning system. The island is small, densely settled in places, and carries a lot of protected fabric — listed buildings, conservation areas, the coastal national park, the green zone. The policy response has been to keep a tighter grip on what happens without scrutiny.

The practical effect: the “permitted development” category in Jersey is real but small, and it is riddled with conditions that switch it off.

The conditions that switch permitted development off

Before you look at whether a particular type of work is permitted, check whether any of these apply to your property. Any one of them can remove rights that would otherwise exist:

• The property or the land is listed. Listing captures far more than grand houses — it includes ordinary cottages, farm buildings, walls, gateposts and whole groups of structures.
• The property is in a conservation area. External changes that are unremarkable elsewhere become controlled here.
• The work falls outside the domestic curtilage. The curtilage is the land the house actually sits on and uses. Step outside it and you are in a different policy world, especially in the green zone.
• Previous permissions carry conditions. Permissions are frequently granted with a condition removing permitted development rights for the future. Newer estates are the usual culprits.
• The building is not a house. Flats, maisonettes and converted buildings generally have far fewer rights than a detached dwelling.

If any of those is true, assume you need permission and work from there.

Work that nearly always needs permission

• Extensions of any kind — front, rear, side or wraparound
• Loft conversions involving dormers or changes to the roof profile
• Converting an integral garage where the external appearance changes
• New window or door openings above the ground floor, and enlarging existing ones
• Anything altering the external appearance of a property in a conservation area
• Changes of use, including creating a separate unit of accommodation

Work that may not need permission

• Some genuinely internal alterations that do not affect the structure or the exterior
• Small, low outbuildings entirely within the curtilage, subject to size and siting limits
• Replacement windows and doors in any material on an unlisted property — in a conservation area, only where they cannot be seen from a road or the foreshore
• New window and door openings on the ground floor of an unlisted property
• Routine repair and maintenance using matching materials

Note what the window rule does not say. Jersey sets no requirement to match the old material, so timber to uPVC is allowed where the rule applies. It stops at listed buildings and at conservation-area windows the public can see.

Internal work still needs the other consent

Permitted development is a planning concept. It says nothing about building bye-laws.

You can be entirely correct that your internal alteration needs no planning permission, and still need building bye-law approval for it — because you are removing a load-bearing wall, altering drainage, changing a staircase, or affecting fire separation. These are two separate systems, assessed by different officers against different tests.

This catches people out constantly. See our guide to bye-law drawings for how the second consent works.

How to check your own position

The States publish a decision tool covering each type of domestic work. It asks whether the property is listed, whether the work is within the curtilage, and so on, then tells you whether permission is needed. Start at the Jersey Planning and Building Portal.

It is accurate, and it is free. What it cannot do is tell you whether the thing you actually want is achievable, or how to present it so that it is approved.

If you get it wrong

Building without permission when it was required exposes you to an enforcement notice requiring the work to be removed or reinstated. A retrospective application is possible, but it is judged against the same policy tests as any other — being already built is not an argument in your favour.

The more common cost is quieter. Unauthorised work surfaces during conveyancing when you come to sell, and it holds up the sale until it is regularised.

Ask us first

We survey the property, confirm the constraints on the title and in policy, and tell you whether you need an application before you commit to anything. That costs nothing.

Book a free consultation or read more about planning permission in Jersey.