Adding air conditioning to your home is considered permitted development provided all the limits and conditions set out in legislation are met. The limits set out the size, placement and quantity of air conditioning units allowed.

If your home is in a protected area such as a Conservation Area then permission will be required. If you live in a listed building then consent will be required.

The installation of air conditioning must comply with building regulations. It is advisable to contact an installer who can provide the necessary advice, preferably one who belongs to either the Microgeneration Certification Scheme or the relevant Competent Person Scheme.

For more information on air conditioning, read our heat pumps common project.

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Under the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended), you have a general permission to install an antenna up to a specific size on property without the need for planning permission. This general permission depends on your house type and area. Your local planning authority can give you more advice.

• Houses and buildings up to 15 metres high

• Houses and buildings up to 15m high in designated areas

• Buildings 15 metres high or more

• Buildings 15 metres high or more in designated areas

• Building regulations for satellite, TV and radio antenna

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To qualify as permitted development some household building work projects – notably extending a house – must not exceed limits to the volume being added.  

In England, the volume allowance mostly applies to loft conversions. You can read more on the Planning Portal. 

Use the volume calculator to find out the volume of several loft conversion and extension types.

No, a two-storey extension will always require planning permission. Permitted development rights only allow for certain types of single-storey extensions without the need for a planning application, provided they meet specific criteria. All extensions of more than one storey fall outside of these rights and must be assessed through the formal planning process requiring householder planning permission.

Read more about extensions on Planning Portal

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A garden gazebo or freestanding awning will often fall under permitted development rights provided it abides by the restrictions set out by government. In this instance a garden gazebo or freestanding awning will be classed as an outbuilding and should not be in front of the house or more than 2.5 metres in height.

Different rules apply if the awning is attached to the house itself. It may still be permitted development, but falls under the class of enlargement, improvement or alteration.

Read more information including the full list of rules for outbuildings

Read further guidance on extensions.