9x5 Architects
Architecture practice focused on homes and listed buildings.
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Architecture and planning practices across the island, for new homes, extensions, listed buildings and commercial projects. Each listing links to the practice’s own website and portfolio.
Based in: St Helier (5), St Brelade (2), St Mary (2), St Saviour (2), and 2 that don’t publish a parish.

Architect · Jersey
Architecture practice focused on homes and listed buildings.

Architecture & interiors · St Helier
Architecture and interior design studio working on homes and commercial spaces.

Architect · St Saviour
Residential, heritage, commercial and hospitality projects.

Architect · St Helier
Chartered architects working on residential and commercial projects.

Architect · St Mary
New builds, remodelling, extensions and conversions.

Architect · St Saviour
Architecture practice with a residential focus.

Architect · St Mary
Design-led residential architecture, including historic conservation work.

Architect · St Brelade
Independent chartered architecture practice.

Architect · St Helier
Residential and commercial architecture practice.
Profile and map →
Architecture & planning · St Helier
Architecture, planning and advice on historic buildings.

Architect · Jersey
Architecture for residential, commercial, hospitality and public projects.

Architect · St Helier
Bespoke homes, developments, schools and healthcare projects.
Profile and map →
Architect · St Brelade
Architecture, conservation, interiors and sustainability consulting.
Profile and map →Listed in alphabetical order from details each business publishes itself. A listing isn’t a recommendation, and none of these businesses has paid to be here. Missing a business, or something out of date?
Jersey has its own law on who can call themselves an architect, and its own planning system. A short guide to both, before you start a project.
“Architect” is a protected title in Jersey, under the island’s own Architects (Registration) (Jersey) Law 1954 (opens in a new tab) rather than the UK’s Architects Act. Nobody may practise under a name containing the word “architect” unless they are registered with the Royal Court, and that requires registration with the UK’s Architects Registration Board. You can search the ARB register (opens in a new tab) online.
“Chartered architect” means a chartered member of RIBA, the Royal Institute of British Architects: a professional membership on top of registration. The law protects the title, not the work, so architectural designers and planning consultants also draw plans and make applications, without calling themselves architects.
The Association of Jersey Architects (opens in a new tab) has brought the island’s architects together since 1961, and all its members are registered with the ARB. Its website lists its members.
Applications go through the Government of Jersey’s Planning and Building portal (opens in a new tab). Most are decided by planning officers (opens in a new tab), and the rest by the Planning Committee, which meets in public each month. The target is 8 weeks for a minor application and 13 weeks for a major one, and the public has 21 days to comment.
Decisions are made against the Bridging Island Plan (opens in a new tab), adopted in 2022. Fees are published on gov.je, and the portal has a fee calculator. You submit first and are sent the fee once the application is validated.
Planning permission covers what you build and where. Building bye-law permission, under the Planning and Building (Jersey) Law 2002 (opens in a new tab), covers how: structure, fire safety and the like. An extension usually needs both. The only extensions that skip bye-law permission (opens in a new tab) are conservatories and covered areas under 20 square metres.
The General Development Order (opens in a new tab) gives automatic planning permission for some minor work. A house can be extended by up to 30 square metres in total since 1 June 2007, for example, unless a planning condition has removed that right. The Order was last changed in April 2026, so check the current limits before you rely on them.
Jersey lists buildings and places in four grades, with Jersey Heritage advising the Government. There’s no separate “listed building consent” as in England: work to a listed building needs a planning application with a heritage impact statement (opens in a new tab), made before work starts. Several of the practices above list historic buildings among their specialisms.
General information, checked against official sources on 1 October 2026. Rules change, so check the linked sources before you rely on them.
Yes. Under the Architects (Registration) (Jersey) Law 1954, nobody may practise under a name containing the word architect unless they are registered with the Royal Court, which requires registration with the UK Architects Registration Board.
No law requires one. Jersey’s architects law protects the title, not the work, so architectural designers and planning consultants also prepare applications. An architect is worth considering for larger, complex or listed projects.
Planning permission decides whether you can build something and what it looks like. Building bye-law permission checks it is built safely, covering things like structure and fire safety. Many projects, including most extensions, need both.
The Government of Jersey’s target is 8 weeks for a minor application and 13 weeks for a major one. The public has 21 days to comment on an application.
Sometimes. The General Development Order allows extensions of up to 30 square metres in total since 1 June 2007, unless a planning condition has removed that right. Building bye-law permission may still be needed, and the limits were last changed in April 2026, so check before you start.
Jersey has no separate listed building consent. Work to a listed building needs a planning application with a heritage impact statement before work starts.
For business owners: portfolio websites, better photos of your work (video), writing a good About page (video), data protection registration with the JOIC.
Listing is free. We add businesses from the details they publish on their own websites, and last checked these on 2 October 2026.
If this is your business and something is wrong, or you’d rather not be listed, use the form and we’ll update or remove it as soon as we can. You can also email hello@jerseyweb.je.
We build portfolio websites for Jersey practices, with project pages that load fast and look sharp on every screen. Builds start from £100, depending on the job, and hosting is from £20 a month.
Google Analytics and Microsoft Clarity. Say no and neither of them loads. What each one stores, and what Microsoft use theirs for.