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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.
7.4 Single storey rear extensions
7.4.1
Where planning permission is required, any proposal should be exemplar quality. Proposals must:
for terraced and semi-detached properties, be no higher than 2.4m at the side boundary, if the extension is greater than 3m in length. Height will be measured from the adjoining properties and ground level changes taken into consideration.
for detached properties, be no higher than 2.4m at the side boundary, if the extension is greater than 4m in length. Height will be measured from the adjoining properties and ground level changes taken into consideration.
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 this here.
7.4.2
Where homes have already been extended, consideration will be given to the cumulative impact on character and neighbouring amenity. This will not affect permitted development rights.
7.4.3
Biodiverse/green roofs should be considered for any newly introduced flat roof. Read more about green roofs here.
7.4.4
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.
Terraced house with single storey rear extension, full width
Detached house, max 2.4m at the side boundary if extension is over 4m deep
Infill extensions
An infill extension fills the space at the side of a property, for example between an outrigger and side boundary.
7.4.5
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.4.6
Proposals should be no higher than 2.4m at side boundaries, 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.
7.4.7
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, 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.
7.4.8
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’.
7.4.9
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.4.10
Proposals should be no higher than 2.4m at side boundaries, 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.
7.4.11
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, no higher than 2.4m on the boundary
Retrofit considerations for this type of alteration - this can be viewed closer-up 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.
7.4 Single storey rear extensions
7.4.1
Where planning permission is required, any proposal should be exemplar quality. Proposals must:
for terraced and semi-detached properties, be no higher than 2.4m at the side boundary, if the extension is greater than 3m in length. Height will be measured from the adjoining properties and ground level changes taken into consideration.
for detached properties, be no higher than 2.4m at the side boundary, if the extension is greater than 4m in length. Height will be measured from the adjoining properties and ground level changes taken into consideration.
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 this here.
7.4.2
Where homes have already been extended, consideration will be given to the cumulative impact on character and neighbouring amenity. This will not affect permitted development rights.
7.4.3
Biodiverse/green roofs should be considered for any newly introduced flat roof. Read more about green roofs here.
7.4.4
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.
Terraced house with single storey rear extension, full width
Detached house, max 2.4m at the side boundary if extension is over 4m deep
Infill extensions
An infill extension fills the space at the side of a property, for example between an outrigger and side boundary.
7.4.5
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.4.6
Proposals should be no higher than 2.4m at side boundaries, 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.
7.4.7
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, 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.
7.4.8
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’.
7.4.9
Proposals must ensure the ridge height is lower than the sill of any first floor windows.
7.4.10
Proposals should be no higher than 2.4m at side boundaries, 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.
7.4.11
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, no higher than 2.4m on the boundary
Retrofit considerations for this type of alteration - this can be viewed closer-up in the right-hand side bar
Learn about the retrofit ideas above, and other retrofit measures, using the links below:
Terraced house with single storey rear extension, full width
Detached house, max 2.4m at the side boundary if extension is over 4m deep
Infill extension, no higher than 2.4m on the boundary
Wraparound extension, no higher than 2.4m on the boundary
Retrofit considerations for this type of alteration - this can be viewed closer-up in the right-hand side bar 