Do I Need Planning Permission in Somerset? A Homeowner's Guide
Planning permission is one of the most common questions we're asked by homeowners in Taunton and Somerset. The good news is that many common home improvements don't need it — here's what you need to know.
Planning rules in England are governed nationally, but applied locally by Somerset Council and — for properties within Exmoor National Park — the Exmoor National Park Authority. Understanding what you can and can't do without permission can save significant time and expense at the outset of your project.
What is Permitted Development?
Permitted Development (PD) rights allow homeowners to carry out certain types of work without needing to apply for full planning permission. These rights are set by the government and apply to most residential properties in England, subject to conditions.
However, PD rights can be removed or restricted in certain circumstances — for example, in conservation areas, on listed buildings, or where a planning condition on a previous permission has removed PD rights. If you're unsure whether your property has full PD rights, we can advise or help you check with the council.
Important Note
Even where planning permission isn't needed, Building Regulations approval is almost always required for extensions, loft conversions and structural work. This is separate from planning permission and ensures the work is structurally sound, energy efficient and safe.
House Extensions — When Is Planning Permission Needed?
Under standard Permitted Development rules, you can extend your home without planning permission if the extension meets all of the following conditions:
Permitted Development (No Planning)
- Single storey rear extension up to 4m deep (detached) or 3m (semi/terrace)
- Does not exceed the height of the existing house
- Does not extend beyond the side elevation on a road
- Materials match the existing house reasonably well
- Total footprint of extensions does not exceed 50% of original garden
Full Planning Required
- Single storey rear extension deeper than 4m/3m (unless using NCS)
- Any extension in a conservation area or AONB that's larger than permitted
- Side extensions that front onto a road (in most cases)
- Properties where PD rights have been removed
- Listed buildings (always need Listed Building Consent)
Larger Extensions — The Neighbourhood Consultation Scheme
If you want to build a larger single storey rear extension — up to 8m deep for a detached house or 6m for attached houses — you can use the Neighbourhood Consultation Scheme (NCS). This process requires you to notify Somerset Council before starting work, and neighbours are given the opportunity to object.
If no objections are received (or objections don't meet the planning impact tests), you get Prior Approval to proceed. The council must respond within 42 days. We manage this process on behalf of our clients as part of our project management service.
Loft Conversions in Somerset
Most standard loft conversions don't require planning permission in Somerset. Under Permitted Development, you can convert your loft provided:
- The additional roof volume does not exceed 40m³ (terraced houses) or 50m³ (detached/semi-detached)
- No part of the extension extends beyond the highest part of the existing roof
- No balconies, verandas or raised platforms are created
- Side-facing windows are obscure-glazed and non-opening below 1.7m
- The materials used are similar in appearance to the existing house
Conservation Areas & Listed Buildings in Somerset
Somerset has numerous conservation areas — particularly in Taunton, Bridgwater, Wellington, Minehead and many villages across the county. If your property is in a conservation area, Permitted Development rights are more restricted. In particular, you may need planning permission for any extension visible from a highway.
Listed buildings require Listed Building Consent (LBC) for virtually any alteration — internal or external. This is a separate consent from planning permission and is handled by Somerset Council's Historic Environment team. We have experience working on listed properties and can advise on what's likely to be approved.
Our Advice for Somerset Homeowners
When we visit your property to discuss a project, one of the first things we assess is the planning position. We'll tell you clearly whether we believe the works are Permitted Development, whether you need to use the NCS process, or whether a full planning application is necessary. We can manage planning applications on your behalf, from preparing drawings to liaising with the council throughout the process.
If you're unsure about the planning situation for your property, please give us a call on 01823 585306 — we're happy to discuss it without any obligation.