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Do I need Planning Permission

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  • 09-09-2020
Do I need Planning Permission

What Building Work Needs Planning Permission?

Almost all internal works such as garage conversions, loft conversions, garage conversions, bathrooms, kitchens rewiring or new staircases, do not require planning permission.

However, you must always check if you need planning permission if you live in a listed property or within a conservation area. If you want to build something new or make a significant change to your property, you will probably need to obtain planning permission.

If your project does require planning permission and you do the work without getting it, you will likely be served an enforcement notice ordering you to undo all the changes that have done. 

Here a some of the project you do not require planning permission for, providing they meet the permitted conditions and limits.


Outbuildings are considered to be permitted development, that does not require an application for planning permission, this is of course, on the proviso all the conditions are met.

The rules that govern outbuildings apply to sheds, garages, greenhouses and other ancillary garden buildings such as ponds, swimming pools, sauna cabins, enclosures (including tennis courts), kennels, and many different kinds of structure.  The structures must be for a purpose that is incidental to the enjoyment of the dwelling house. 


If you add a porch to any external doors of your home, it is considered to be permitted development and therefore as long as limits and conditions are met, you do not require planning permission.

Loft conversion (roof extension):

Providing the correct limits and conditions are met. A roof extension or loft conversion for your house is considered to be permitted development, that does not require an application for planning permission. 

(single storey)

Conservatories fall under the same planning regulations as any addition or extension to a house. They do not need planning permission as long as the right conditions and limits are met. 

How Big can a Building be Without Planning Permission?

Recently the permitted development rules have been relaxed, and this means that you can build an extension of up to six metres without planning permission. If your house is detached, you are now permitted to build up to eight meters.

See below a list of some common building works that do not need planning permission. You must check to see if you need building regulations consent before you start any work on your property.


Remodelling the interior

Remodelling the interior of your home is a great way to add more space and can often be done within Permitted Development.


Move/Add Windows & Doors:

You can replace or add new windows in the original walls of your house without needing planning approval unless conditions were attached to the original permission.


Roof lights

Under Planning Development, you can make alterations to the roof of a dwelling like roof lights; they cannot project more than 15cm from the slope of the roof.


Convert Two Homes into One

Converting a pair of semis or two flats, into one property can usually be done under Planning Development, this cannot be done if you are changing a single property into two dwellings.


Gates, Walls and Fences

Permitted Development facilitates the construction, erection, improvement, maintenance, or alteration to a fence, wall, gate, or other means of enclosure, providing such work stays within the following limitations:

The height would not exceed 2m for any other gate, fence etc

The development is not permitted under Planning Development around a listed building.

The height will not exceed 1m when adjacent to a highway.

Do I need Planning Permission for a Garage?

You do not require planning permission for a detached garage or carport so long as the ground area covered by the carport, garage and any other buildings excluding the original house is not more than half the total area of the property. The garage must be used for domestic purposes only. If you live in a home which is classed as a listed building, you will likely need.

Listed Building Consent for any building works you want to do at the property. Also, suppose the development is within the curtilage of a listed building unless listed building consent has already been granted. In that case, you might need to submit a planning application for the building work. Your local planning office will be able to advise you and give you all the information you require.

Do I need Planning Permission for Extensions?

An extension or addition to your home is usually considered to be permitted building development. Therefore, you will not need to go through the additional process of getting planning permission as long as:

The extension you are building is no more than half the area of land around the original house. The term “original house” is seen as it was in 1948, or after this date how it was newly built.


Your extension or addition is not forward of the side elevation onto a highway or principal elevation.


Your extension must not be higher than the highest part of the roof of the building.


Two-storey extensions are no closer to the rear boundary than seven metres.


Your extension must not include raised platforms, balconies or verandas.


You must use materials that in appearance are similar to your existing property.


For single-storey building extensions, it must not extend beyond the rear wall of the original house by more than six metres, or if your home is detached, you are now permitted to build up to eight meters. 

Your local planning authority will be able to give you any advice or information you require. It is always best to seek professional advice before you start any building works on your property.

How do I get a Planning Permission Application?

In most cases, planning and building control applications are submitted online. You can apply to every local authority in England using the Planning Portal online. At the start of the project, you must decide whether the development requires planning permission or if it requires building regulations approval, or if your project may need both.

You will likely need planning permission if you want to:

Build something completely new.

Make a significant change to your building, e.g. building an extension.

Change the use of your building, e.g. turn your property into flats or a Bed and Breakfast.

If your building project requires planning permission and you do the work without getting it, you can be served an ‘enforcement notice’ ordering you to undo all the changes you have made. It is illegal to ignore an enforcement notice, but you can appeal against the decision.

If you want to find out more information about whether you need planning permission for your building project, you can discuss it with your local architect. If you are looking for an architect in London we can help you with planning permission advice.

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