Permitted development – A Beginner’s Guide
19th December 2024
Permitted development rights give homeowners a chance to extend or alter their properties without the hassle of seeking planning permission. But understanding these rules can be a bit like solving a tricky puzzle. So, let’s dig into the details of permitted development guidelines to see what homeowners can and can’t do. This is intended to give a brief overview and is not a comprehensive guide. Feel free to call our office with any questions or to discuss permitted development in more detail.
Rear Extensions
Permitted development rules typically outline the maximum height, depth, and overall size of extensions that can be added to a property. For instance, single-story rear extensions must not exceed four meters in height (3m in height for a flat roof extension in most cases) and extend beyond the original rear wall of the house by more than three meters (for attached houses) or four meters (for detached houses).
Side Extensions
Just like rear extensions must not exceed four meters in height.
The width of the extension can be a maximum of half the width of the existing house. (the width of the house is taken from the widest point)
Loft Conversions
Taking advantage of permitted development allowance is often the best approach for converting the loft space as they are usually much less restrictive than planning rules.
50 cubic metes of space can be added to a loft for detached and semi-detached properties
40 cubic meters of space can be added to a loft for a terraced property.
This additional space can come in the form of a dormer, changing the shape of the roof, or a combination of the two.
Porches
Permitted development guidelines allow for the creation of a porch subject to certain criteria;
The porch can be a maximum of 3m2 (measured externally)
A maximum of 3m in height
The porch must be a minimum of 2m from the front boundary of your property.
Outbuildings
Outbuildings must be single-storey with a maximum eaves height of 2.5 meters and maximum overall height of 4 meters with a dual-pitched roof, or 3 meters in any other case.
If the outbuilding is within 2 metres of the property boundary the whole building should not exceed 2.5 metres in height.
Extensions, outbuildings, and other additions must not exceed 50% of the total area of land around the original house. Sheds, all other outbuildings, and extensions to the original house must be included when calculating this 50% limit
Location and Property Type Restrictions:
Conservation Areas: Properties situated within conservation areas are subject to stricter regulations to preserve the character and heritage of the area. Permitted development rights may be limited or even revoked entirely for certain alterations or extensions in these areas.
Listed Buildings: Homeowners with listed buildings must proceed with caution, as permitted development rights are often significantly restricted. Even minor alterations to listed buildings may require special consent to ensure that the historical integrity of the property is maintained.
Design and Appearance Guidelines
Materials and Finishes: Permitted development rules stipulate requirements regarding the materials and finishes used in alterations or extensions. The proposed materials must be similar in appearance to the existing materials for extensions and loft conversions but different materials can be used for porches and outbuildings.
In summary, while permitted development rights offer homeowners greater flexibility in improving their properties, adherence to the specific rules and guidelines is essential. By understanding the intricacies of permitted development, homeowners can navigate the process with confidence and ensure that their projects comply with the relevant regulations. Consulting with a professional architect or planner can provide valuable guidance tailored to the unique circumstances of each property, helping homeowners make informed decisions and achieve their desired enhancements within the bounds of permitted development.
