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Can I build a two-storey extension without planning permission?
Two storey rear extensions are considered to be permitted development, meaning they do not require an application for planning permission provided certain limits and conditions are met. If these limits are exceeded then you will need to apply for planning permission from the local planning authority.
Houses on designated land such as national parks or conservation areas are excluded from the permitted development rights and will require an application for planning permission.
To fall within permitted development rights, the extension should be no higher than the existing house, and where it is within two metres of a boundary, the eaves should be no higher than three metres.
Any double storey extension to the side or front of the house will require planning permission. You can view the full limits and conditions on our Two-storey extension Mini Guide.
If you live in a listed building you will require listed building consent for any major works to the property.
Common Questions
You may wish to make loft alterations to enhance the storage facilities available or to increase the living space of the home. Converting the loft of a house is considered to be permitted development (not requiring an application for planning permission) subject to certain limits and conditions.
Remember, building regulations approval is required to convert a loft or attic into a liveable space.
Find out about loft conversions
There are different rules for flats and maisonettes regarding loft conversions. Read guidance for converting the loft of a top floor flat.
Planning permission will not be require to add an en-suite provided it is within the existing building and not part of a wider project such as an extension.
Building regulations will have to be considered when adding an en-suite as it impacts drainage, ventilation and electrics. It is recommended that you have the work completed by a member of the competent person scheme.
Whether or not a static caravan can be kept on your property depends on how long it will be kept there for and what it’ll be used for. If the caravan becomes a new home on the property, will be rented out, or will stay in place for more than 28 days then permission if often needed.
If no material change of use occurs, and the caravan is only used for a purpose incidental to the enjoyment of the house then often no application for planning permission will be required. In this instance it may be classed as permitted development, as such it would have to adhere to limits and conditions set out for outbuildings.
If the property is in the curtilage of a listed building or in a conservation area you should contact your local planning authority.
Building above an attached garage is treated the same as adding a storey to the rest of your home. This is considered to be permitted development, not requiring an application for planning permission provided you meet the set rules and requirements.
You will still need to submit an application for prior approval to your local planning authority.
Read the list of rules and requirements for extending upwards.
Work to the roof of a house (e.g. re-roofing) that does not change its external appearance will usually not require an application planning permission as it is classed as ‘permitted development’. There are certain conditions and limits that need to be met to qualify for permitted development rights.
Read more about permitted development for work to a roof.
A new roof must comply with building regulations to ensure it is structurally safe, energy efficient and properly ventilated.
