.jpeg)
What are permitted development rights?
Permitted development (PD) rights are entitlements granted by Parliament that allow homeowners to make certain changes to their property without going through a full planning application. They exist to simplify the process for common, lower-impact improvements - and used well, they can save significant time, money and uncertainty.
However, PD rights are not universal. They apply to most houses in England, but not to flats, maisonettes or listed buildings. They may also be restricted or removed entirely if you live in a conservation area, a national park, or an area subject to an Article 4 Direction - a local authority measure that removes specific PD rights in a given location. The first step with any project is confirming whether your property benefits from them at all.
What can typically be built under permitted development?
For most standard houses, the following types of work are commonly carried out under PD rights:
Single-storey rear extensions. A single-storey extension at the rear of a detached house can be built under PD up to 4 metres deep without a full planning application, or up to 8 metres via the Prior Approval route. For semi-detached and terraced properties, the standard depth is 3 metres, or 6 metres under Prior Approval.
Loft conversions. Adding a dormer or converting a loft space is often possible under PD, subject to volume limits and restrictions on what can be added to the front roof slope facing a highway.
Outbuildings and garden rooms. Structures in the garden such as home offices, garages or studios can generally be built under PD provided they do not cover more than half the garden area and meet height restrictions.
Porches. A modest porch to the front of the house can be added under PD, subject to size and height limits.
The limits matter. Exceeding them - even slightly - moves your project into full planning application territory.
Planning permission vs building regulations: an important distinction
Even where a project falls comfortably within permitted development, it will still need to comply with building regulations. These are separate requirements covering structural safety, fire protection, insulation, drainage and more. Many homeowners assume that because they do not need planning permission, there are no other approvals required - this is a common and sometimes expensive misunderstanding.
At MPS, we always ensure that work is compliant with building regulations regardless of the planning route taken. These standards exist to protect the people living in the building and ensure the work is sound.
Should you apply for a Certificate of Lawfulness?
Even when a project is clearly within PD limits, it can be worth applying to your local authority for a Certificate of Lawfulness. This formally confirms that no planning permission was required and can be invaluable if you come to sell the property, as buyers' solicitors will often ask for documentation.
It is not always necessary, but for larger extensions or unusual plots, the peace of mind is usually worth the modest fee.
How MPS can help
Understanding what falls within your permitted development rights - and what does not - is something we work through with clients early in the process. Getting clarity upfront prevents delays, avoids abortive work and makes the whole project run more smoothly.
If you are unsure whether your planned project needs planning permission, feel free to get in touch and we can help you think it through.
.webp)