Licensing Requirements for Building a Conservatory in the UK
Thinking about adding a sun‑filled conservatory to your home? Before you start picking out glass panels, you need to know which licences and approvals are actually required. Skipping the paperwork can lead to fines, forced removal, or delays that cost more than the extra paperwork.
When Planning Permission Is Needed
In most cases a conservatory falls under "Permitted Development" (PD) rules, which means you don’t need full planning permission if you stay within set limits. The key limits are:
- Maximum height of 4 m for a single‑storey rear extension.
- Side extensions can’t exceed 3 m in height (or 4 m if made of flat roofs).
- The conservatory must not be larger than 50% of the existing house footprint.
- It must be built within the original house’s rear or side wall line.
If you break any of these, the local council will ask for a full planning application. Also, if you live in a conservation area, listed building, or a development that violates any local design guide, you’ll need permission regardless of size.
Building Regulations and Other Licences
Even when you’re under PD, you still have to meet Building Regulations. These rules cover structural safety, fire protection, energy efficiency, and ventilation. You can either apply for a "building notice" (simple, low‑cost route) or a "full plans" submission (more detailed, recommended for larger projects).
Other licences you might need include:
- Party Wall Act – If your conservatory’s work reaches a neighbour’s wall or boundary, you’ll need a Party Wall Agreement.
- Electrical and Plumbing – Any new wiring or hot water supply must be carried out by a qualified electrician or plumber and inspected under the relevant regulations.
- Tree Preservation Orders – Cutting down or trimming trees on your property for a conservatory may require a separate permit.
Most local councils provide an online portal where you can submit PD notifications and building regulation applications. Expect a fee of around £100–£200 for a building notice, and a bit more for a full plans submission.
Tip: Talk to your builder early. A reputable contractor will know the exact forms you need and can help you avoid common pitfalls like forgetting to inform the neighbour under the Party Wall Act.
In short, the steps are:
- Check the PD limits for size, height, and location.
- If you’re within limits, submit a PD notification to the council (no fee for notification).
- Choose a building notice or full plans route for Building Regulations approval.
- Arrange any extra licences – Party Wall, Tree Preservation, electrical, plumbing.
- Keep copies of all approvals before you start work.
Following this checklist saves you from costly stop‑work orders and keeps the project moving smoothly. Your new conservatory will be a legal, safe, and enjoyable addition to your home when you get the licences right from the start.
