Guide to Permitted Development Rights
- 7 days ago
- 9 min read
Thinking about renovating or extending your home? Permitted Development Rights (PDRs) can allow homeowners to carry out certain improvements and extensions without the need to submit a full planning application.
For many homeowners, this can save time, reduce costs and simplify the planning process. However, permitted development is subject to detailed rules, limitations and conditions, and the rights can be restricted or removed in certain circumstances.
At a Glance
Permitted development rights can allow you to:
Extend your home without submitting a full planning application, provided the relevant criteria are met.
Build a single-storey rear extension up to 3 metres on a terraced or semi-detached house, or up to 4 metres on a detached house.
Build larger rear extensions through the prior approval process, subject to specific requirements.
Construct certain single-storey side extensions, provided they meet the relevant height and width restrictions.
Convert a loft within the permitted development volume limits.
Carry out certain garage and outbuilding alterations.
Obtain a Lawful Development Certificate to confirm that proposed or completed work is lawful.
The rules can be complex, particularly where a property has already been extended, is located within a designated area, or is affected by an Article 4 Direction. Professional advice can help establish what is achievable before you commit to a design.
A Brief History of Permitted Development
The need to control and manage development has evolved alongside the growth of towns and cities.
During the Industrial Revolution, rapid migration from rural areas to urban centres resulted in significant growth and, in many cases, poorly planned and overcrowded housing. The development of town planning gradually introduced greater control over how buildings and settlements were designed and developed.
Modern permitted development rights form part of this wider planning system. Rather than requiring planning permission for every minor alteration, national legislation allows certain types of development to take place automatically, provided specific conditions and limitations are met.
Permitted development rights therefore provide a balance between allowing homeowners and businesses to make reasonable changes to their properties while maintaining appropriate control over development.
What are Permitted Development Rights?
Permitted development rights are rights granted by national planning legislation that allow certain types of building work and changes of use to take place without the need for a conventional planning application.
For homeowners, these rights can cover projects such as single-storey extensions, loft conversions, outbuildings and certain alterations to existing properties.
In England, the principal legislation is the Town and Country Planning (General Permitted Development) (England) Order 2015, as amended. The rules applying to houses are primarily contained within Schedule 2, Part 1.
It is important to remember that permitted development rights are not unlimited. They apply only where all the relevant limitations and conditions are satisfied.
They generally apply to houses rather than flats or maisonettes, and rights can be restricted or removed by planning conditions, Article 4 Directions or other planning designations.
The National Framework and the North East
Permitted development rights are established nationally rather than being created by individual local authorities. This means that the fundamental rules are broadly consistent across England.
However, the North East presents a particularly varied planning environment. The region includes dense Victorian and Edwardian terraces, post-war housing estates, historic villages, coastal settlements and sensitive rural landscapes.
As a result, the practical opportunities offered by permitted development can vary considerably from one property to another.
For example, a property may be affected by a Conservation Area, an Article 4 Direction, a Listed Building designation or another planning restriction. These factors can significantly alter what can be carried out without a planning application.
Protecting Heritage and Conservation Areas
Permitted development rights can be restricted in areas where the character and appearance of the built environment are particularly sensitive.
Article 4 Directions are one mechanism used by local planning authorities to remove specified permitted development rights. They are often introduced in historic areas where uncontrolled alterations could have a detrimental effect on the character of the area.
This is particularly relevant across parts of the North East, where historic terraces, traditional town centres and conservation areas form an important part of the region's architectural character.
Before assuming that permitted development rights apply, it is therefore important to check the planning history and designations affecting your property.
Rules for Different Types of Development
The permitted development rules vary depending on the type of work proposed. The following provides an overview of some of the most common projects.
Single-Storey Rear Extensions
A single-storey rear extension may qualify as permitted development where it satisfies the relevant limitations.
Generally:
It must be located to the rear of the original house.
It must not extend beyond the rear wall of the original house by more than 3 metres for a terraced or semi-detached house, or 4 metres for a detached house.
The extension must be no more than 4 metres high.
Where the extension is within 2 metres of a boundary, the maximum eaves height is generally 3 metres.
The materials used for the exterior should be similar in appearance to those of the existing house.
The total area covered by extensions and other buildings must not exceed 50% of the land around the original house.
The extension must not project forward of the principal elevation or, where applicable, the side elevation fronting a highway.
The definition of the “original house” is important. It generally means the house as it was originally built, or as it stood on 1 July 1948 if it was built before that date. Previous extensions can therefore affect the amount of development available today.
Larger Rear Extensions and Prior Approval
Permitted development rights can also allow larger single-storey rear extensions through a prior approval process.
Under the current rules, the maximum depth can increase to:
6 metres for a terraced or semi-detached house; or
8 metres for a detached house.
This larger extension route is subject to prior approval and additional restrictions. The local planning authority will consult neighbouring properties and consider matters such as the impact on adjoining properties.
The larger rear extension provisions do not apply in the same way to designated land or Sites of Special Scientific Interest, so the location of the property must be checked carefully.
Side Extensions
A side extension can qualify as permitted development where it meets the relevant criteria.
Generally, a side extension:
Must be single storey.
Must not extend beyond the side elevation where the relevant restrictions apply.
Must not exceed half the width of the original house.
Must be no more than 4 metres high.
Must comply with the relevant 2-metre boundary and eaves-height restriction.
Must use materials of a similar appearance to the existing house.
Must comply with the 50% limit on the area of land around the original house.
Side extensions are subject to additional restrictions on designated land, including Conservation Areas.
Two-Storey Extensions
Two-storey extensions are subject to more restrictive permitted development rules.
A rear extension of more than one storey may qualify where it meets specific requirements, including restrictions on its depth, height, roof pitch and windows.
Key considerations include:
The extension must not extend more than 3 metres beyond the rear wall of the original house.
It must not be within 7 metres of a boundary opposite the rear wall.
The roof pitch should match the existing house as far as practicable.
Upper-floor windows in a side elevation must generally be obscure glazed and non-opening, unless the opening part is more than 1.7 metres above the floor.
A two-storey side extension does not benefit from the standard permitted development rights and will require planning permission.
Because two-storey extensions can have a significantly greater impact on neighbouring properties, the permitted development rules should be checked carefully before proceeding.
Garage Conversions
Converting an existing garage can sometimes be carried out under permitted development rights, particularly where the work remains within the existing building and does not enlarge it.
However, the planning position depends on the circumstances of the property and the proposed use. Planning conditions, previous planning permissions and restrictions on the property can also affect whether permitted development rights are available.
Building regulations approval may also be required, even where planning permission is not.
For this reason, a garage conversion should be assessed on an individual basis rather than assuming that planning permission is automatically unnecessary.
Loft Conversions
Loft conversions can be carried out under permitted development, provided the relevant limitations and conditions are met.
The permitted development volume allowance is:
40 cubic metres for terraced houses.
50 cubic metres for detached and semi-detached houses.
The volume of any previous roof extensions must also be taken into account.
Other requirements include:
The extension must not exceed the height of the existing roof.
Materials should be similar in appearance to the existing house.
The development must not extend beyond the existing roof slope on the principal elevation where it fronts a highway.
Dormer walls should be appropriately set back from the existing wall face.
Side-facing windows must generally be obscure glazed.
Any opening part of a window located less than 1.7 metres above the floor should comply with the relevant restrictions.
Loft conversions can also be affected by designated land and previous alterations to the roof, so the existing property should be assessed before design work begins.
Building Work Not Covered by PD
Some forms of development are specifically excluded from permitted development rights, while others may fall outside the rules because they exceed the relevant limits.
Examples include:
Balconies and verandas.
Extensions that exceed the permitted height or depth limits.
Development that exceeds the 50% limit on the area of land around the original house.
Certain front extensions.
Two-storey side extensions.
Side extensions on designated land.
Roof extensions that exceed the permitted volume or height restrictions.
Development that does not comply with the relevant window, boundary or roof requirements.
It is important to remember that permitted development is assessed against all of the applicable limitations and conditions. Exceeding just one requirement can mean that planning permission is needed.
Lawful Development Certificate
A Lawful Development Certificate (LDC) is an official certificate issued by the local planning authority confirming that a proposed or existing use or development is lawful for planning purposes.
For homeowners, an LDC can provide valuable certainty where there is any doubt about whether proposed work falls within permitted development rights.
An LDC can be particularly useful because it:
Provides certainty: Confirms the planning status of the development.
Helps with future sales: Provides evidence to prospective purchasers that the development is lawful.
Reduces uncertainty: Establishes the planning position where permitted development rights may be unclear.
Provides a formal record: Creates an official record of the council's determination.
An LDC does not grant planning permission. Instead, it confirms that the development in question is lawful without the need for planning permission.
Prior Approval
Prior approval is a separate planning process that applies to certain types of permitted development.
Rather than submitting a conventional planning application, the homeowner submits details to the local planning authority so that it can consider specific matters identified by the relevant permitted development right.
For larger single-storey rear extensions, for example, the prior approval process allows the local authority to consult adjoining neighbours and consider the impact of the proposal on neighbouring properties.
Prior approval therefore sits between straightforward permitted development and a full planning application. Although planning permission is not required in the conventional sense, the development cannot proceed until the relevant prior approval requirements have been satisfied.
Conclusion
Permitted development rights can provide homeowners with a valuable opportunity to improve, extend and adapt their properties without the time and expense associated with a full planning application.
From rear and side extensions to loft conversions and garage adaptations, permitted development can offer considerable scope to increase space and improve the way a home is used.
However, permitted development is not a blanket right. The rules are detailed, and restrictions can apply depending on the size, location, design and history of the property. Conservation Areas, Article 4 Directions, Listed Buildings and other designated areas can further limit what can be carried out without planning permission. Even seemingly straightforward projects can therefore fall outside the permitted development criteria if just one requirement is not met.
For homeowners considering an extension or alteration, understanding these limitations at the outset is essential. An experienced architect can assess your property, establish whether permitted development rights apply, identify the opportunities available and develop a design that makes the most of your home while complying with the relevant planning and building regulations.
Where appropriate, obtaining a Lawful Development Certificate can also provide valuable certainty for the future.
Ultimately, permitted development rights can be an excellent route to creating a larger, more functional and better-designed home. With the right professional advice, homeowners can understand what is possible, avoid costly mistakes and maximise the potential of their property.
If you are wondering whether your project needs planning permission, or to find out about the construction process as a whole, get in touch today and book a free initial consultation for qualified and professional advice.
Useful Information
An intuitive online guide is provided on the planning portal website. https://interactive.planningportal.co.uk/explore-house
Individual mini-guides are downloadable from the planning portal website.
Disclaimer: Planning rules can change
