We use cookies to ensure our site functions properly and to store limited information about your usage. You may give or withdraw consent at any time. To find out more, read our privacy policy and cookie policy.
Manage Cookies
A cookie is information stored on your computer by a website you visit. Cookies often store your settings for a website, such as your preferred language or location. This allows the site to present you with information customized to fit your needs. As per the GDPR law, companies need to get your explicit approval to collect your data. Some of these cookies are ‘strictly necessary’ to provide the basic functions of the website and can not be turned off, while others if present, have the option of being turned off. Learn more about our Privacy and Cookie policies. These can be managed also from our cookie policy page.
Strictly necessary cookies(always on):
Necessary for enabling core functionality. The website cannot function properly without these cookies. This cannot be turned off. e.g. Sign in, Language
Analytics cookies:
Analytical cookies help us to analyse user behaviour, mainly to see if the users are able to find and act on things that they are looking for. They allow us to recognise and count the number of visitors and to see how visitors move around our website when they are using it. Tools used: Google Analytics
For information about the guidance on this page and how it should be applied, visit Using this SPD.
Where proposals deviate from the guidance here, the Council will need to be satisfied that proposals are high quality and not detrimental to neighbourhood amenity. Pre-application submission is encouraged.
7.5 Single storey rear extensions
7.5.1
For details of permitted development rights for rear extensions to houses, refer to this page on the Planning Portal. If the proposal does not fulfil the criteria stated here, planning permission will be required.
7.5.2
It may be possible to add a single storey rear extension to a ground floor flat. However, planning permission will always be required. For further details, refer to this page on the Planning Portal.
7.5.3
Where planning permission is required, proposals for single storey rear extensions must:
• have a ridge height lower than the sill of any first floor windows.
• ensure the remaining garden space is of a good size, quality, usable and accessible. Permeable surfaces should be used wherever possible. Read more about garden surfaces here.
7.5.4
For terraced or semi-detached properties where there is no existing extension at the immediate neighbouring property, single storey rear extensions that exceed 3m in length should not exceed 2.4m in height at the side boundary. Height will be measured from the adjoining properties and ground level changes taken into consideration.
7.5.5
Where planning permission is required, any proposal for a rear extension should be of exemplar design quality.
7.5.6
Biodiverse/green roofs should be considered for any newly introduced flat roof. Read more about green roofs here.
7.5.7
The inclusion of balconies or terraces may be supported, but each case will be considered individually and on its own merits, given potential neighbour and privacy impacts.
7.5.9
Where homes have previously been extended, consideration will be given to the cumulative impact on character and neighbouring amenity.
Terraced house with a full-width single storey rear extension, should be no higher than 2.4 on the boundary
Detached house with single storey rear extension, should be no higher than 2.4m on the side boundary, where the extension exceeds 4m in depth
Infill extensions
An infill extension fills the space at the side of a property, for example between an outrigger and side boundary.
7.5.9
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.5.10
Proposals should not exceed 2.4m in height at the side boundary, if there is no existing extension on the immediate neighbouring property. Height will be measured from the adjoining properties and ground level changes taken into consideration.
7.5.11
A lightwell or skylight should be included for ventilation, daylight and outlook. For habitable rooms where the lightwell is the only source of natural light, proposed lightwells should measure 1.5-2.m in depth.
Infill extension, should be no higher than 2.4m on the boundary
Wraparound extensions
A wraparound extension fills the space at the side of a property and wraps around the rear of the existing house.
7.5.12
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.5.13
Proposals must not extend more than 3m from the end wall of the outrigger. This is to limit the visual and daylight impact to neighbouring properties, as supported by Policy 57 of the Local Plan, ‘Amenity’.
7.5.14
Proposals should not exceed 2.4m in height at the side boundary, if there is no existing extension on the immediate neighbouring property. Height will be measured from the adjoining properties and ground level changes taken into consideration.
7.5.15
Internal layout should be properly considered, and a lightwell or skylight should be included to provide ventilation and bring daylight into the centre of the house. For habitable rooms where the lightwell is the only source of natural light, proposed lightwells should measure 1.5-2.m in depth.
Wraparound extension, should be no higher than 2.4m on the boundary
Retrofit considerations for single storey rear extensions - this can also be viewed in the right-hand side bar
Learn about the retrofit ideas above, and other retrofit measures, using the links below:
For information about the guidance on this page and how it should be applied, visit Using this SPD.
Where proposals deviate from the guidance here, the Council will need to be satisfied that proposals are high quality and not detrimental to neighbourhood amenity. Pre-application submission is encouraged.
7.5 Single storey rear extensions
7.5.1
For details of permitted development rights for rear extensions to houses, refer to this page on the Planning Portal. If the proposal does not fulfil the criteria stated here, planning permission will be required.
7.5.2
It may be possible to add a single storey rear extension to a ground floor flat. However, planning permission will always be required. For further details, refer to this page on the Planning Portal.
7.5.3
Where planning permission is required, proposals for single storey rear extensions must:
• have a ridge height lower than the sill of any first floor windows.
• ensure the remaining garden space is of a good size, quality, usable and accessible. Permeable surfaces should be used wherever possible. Read more about garden surfaces here.
7.5.4
For terraced or semi-detached properties where there is no existing extension at the immediate neighbouring property, single storey rear extensions that exceed 3m in length should not exceed 2.4m in height at the side boundary. Height will be measured from the adjoining properties and ground level changes taken into consideration.
7.5.5
Where planning permission is required, any proposal for a rear extension should be of exemplar design quality.
7.5.6
Biodiverse/green roofs should be considered for any newly introduced flat roof. Read more about green roofs here.
7.5.7
The inclusion of balconies or terraces may be supported, but each case will be considered individually and on its own merits, given potential neighbour and privacy impacts.
7.5.9
Where homes have previously been extended, consideration will be given to the cumulative impact on character and neighbouring amenity.
Terraced house with a full-width single storey rear extension, should be no higher than 2.4 on the boundary
Detached house with single storey rear extension, should be no higher than 2.4m on the side boundary, where the extension exceeds 4m in depth
Infill extensions
An infill extension fills the space at the side of a property, for example between an outrigger and side boundary.
7.5.9
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.5.10
Proposals should not exceed 2.4m in height at the side boundary, if there is no existing extension on the immediate neighbouring property. Height will be measured from the adjoining properties and ground level changes taken into consideration.
7.5.11
A lightwell or skylight should be included for ventilation, daylight and outlook. For habitable rooms where the lightwell is the only source of natural light, proposed lightwells should measure 1.5-2.m in depth.
Infill extension, should be no higher than 2.4m on the boundary
Wraparound extensions
A wraparound extension fills the space at the side of a property and wraps around the rear of the existing house.
7.5.12
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.5.13
Proposals must not extend more than 3m from the end wall of the outrigger. This is to limit the visual and daylight impact to neighbouring properties, as supported by Policy 57 of the Local Plan, ‘Amenity’.
7.5.14
Proposals should not exceed 2.4m in height at the side boundary, if there is no existing extension on the immediate neighbouring property. Height will be measured from the adjoining properties and ground level changes taken into consideration.
7.5.15
Internal layout should be properly considered, and a lightwell or skylight should be included to provide ventilation and bring daylight into the centre of the house. For habitable rooms where the lightwell is the only source of natural light, proposed lightwells should measure 1.5-2.m in depth.
Wraparound extension, should be no higher than 2.4m on the boundary
Retrofit considerations for single storey rear extensions - this can also be viewed in the right-hand side bar
Learn about the retrofit ideas above, and other retrofit measures, using the links below:
Terraced house with a full-width single storey rear extension, should be no higher than 2.4 on the boundary
Detached house with single storey rear extension, should be no higher than 2.4m on the side boundary, where the extension exceeds 4m in depth
Infill extension, should be no higher than 2.4m on the boundary
Retrofit considerations for single storey rear extensions - this can also be viewed in the right-hand side bar 