The Jersey Island Plan Explained

Every planning decision in Jersey is made against the Island Plan. When a case officer writes that your application is “contrary to policy”, they mean contrary to this document. It is worth understanding what it is, because it explains most refusals before they happen.

What the Island Plan is

The Island Plan is Jersey’s statutory development plan. It sets out where development should and should not go, what kind of development is acceptable in each part of the island, and the tests that individual applications must satisfy.

It does two jobs at once. It carries a proposals map, which puts every parcel of land in Jersey into a zone. And it carries written policies, which say what is acceptable within each zone and across the island generally.

Your application is assessed against both. The zone determines the starting presumption; the policies determine the detail.

Zoning is the first thing to check

The zone your site sits in matters more than almost anything else about your project, and it is checkable before you spend a penny.

The built-up area. Most of St Helier and the island’s settlements. This is where the Plan expects development to happen. A householder extension here starts from a favourable position.

The green zone and the coastal national park. Protected countryside and coast. The presumption runs the other way: development is resisted unless it falls within a narrow set of exceptions. Extensions to existing dwellings may be possible but are held to tighter limits on scale.

Employment, agricultural and other designations. These carry their own policies, and they can prevent a change of use that would be routine elsewhere.

The practical consequence: two identical extensions, on two identical houses, can get opposite decisions because one is inside the built-up area boundary and one is thirty metres outside it.

The policies that catch domestic projects

Beyond zoning, a handful of policy themes account for most householder refusals:

• Design quality and character — whether the proposal respects the scale, form and materials of what is there
• Amenity — overlooking, loss of privacy, loss of light, dominance over neighbours
• Historic environment — listed buildings, conservation areas, archaeological interest
• Natural environment — trees, biodiversity, landscape character
• Flood risk and drainage — whether the site floods and what the development does to runoff
• Parking and access — whether the scheme creates or removes parking, and how it meets the road

How to read the Plan for your own site

1. Find your zone. Establish which designation your site falls in and whether any boundary runs through it.
2. Check for overlays. Listing, conservation area, flood zone, tree protection. These sit on top of the zone and can matter more than it.
3. Read the policies for that zone. They tell you the presumption you are working with.
4. Read the general policies on design and amenity. These apply everywhere and are the ones most often cited in refusals.
5. Be honest about what they say. The Plan is not a hurdle to be argued past. A scheme designed to satisfy it is approved; a scheme designed in spite of it is refused and then appealed at your expense.

Why this is the whole job

Most refusals we see on other people’s applications are not design failures. They are policy failures — the application did not answer the test the officer was obliged to apply, often because nobody identified which test was coming.

Mike Smith, who owns this practice, joined the Jersey Planning Department in 1984 as a Development Control Officer. He assessed applications against the plan of the day and helped write the Jersey Building Bye-Laws. Knowing in advance which policy a scheme will be measured against, and designing for it from the first sketch, is the difference between an 85% success rate and a coin toss.

Plans change

Island Plans are periodically reviewed and replaced, and policy shifts between versions. An application is determined against the plan in force at the time of the decision, not the one in force when you started thinking about it. On a long project, that matters.

Always check the current adopted Plan on gov.je rather than working from an older printed copy or a summary.

Get your site checked

At the free consultation we identify your zone, your overlays and the policies your application will be judged against, and tell you what that means for what you want to build.

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