Residential Development

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If you need to create additional space at home or enlarge your living spaces, there are several options to suit different types of home and budget.

Possible options for enlargements are:

Single storey rear extension

Single storey rear extension under PD rights (3m/4m)

Single storey rear extensions are permitted to the width of the original dwelling house and 4m beyond the rear wall for detached dwellings and 3m for semi-detached and terraced dwelling house. However, any properties located within a conservation area, or having any planning constraint, do not benefit from permitted development rights.

Single storey rear extension under planning permission

Planning permission is required for dwelling houses located within a conservation area or having any planning restrictions or if they exceed the limits governed by permitted development rights. The criteria (depth and height) for rear extensions vary among local planning policies set out by local authorities.

Single storey rear extension under prior approval (up to 6m/8m)

Under the prior approval application, a detached dwelling house will benefit from an extension of up to 8m,

and other types of dwelling houses from up to a 6m extension

Double storey rear extension

Single storey side extension

Planning Permission is not required, if the single storey side extension is less than half the width of the original house and not exceeding the height limit of permitted development rights. Planning permission is required when exceeding these limits or if the property is a flat or maisonette, a listed building or located in a conservation area.

Double storey side extension

Planning Permission is required for double storey side extension. The set- back and set-in of the double storey side extension vary to each local authority

Single storey side and rear extension

Planning Permission is required for single storey side and rear extension which extends to side and rear forming a L-shape extension wrapping around the house.

Double storey side and rear extension

Double storey side and rear extension & loft conversion

Planning Permission is required for single storey side and rear extension which extends to side and rear forming a L-shape extension wrapping around the house.

Conversion of garages into habitable rooms

Planning permission is not usually required, providing the work is internal and does not involve enlarging the building. The proposed window replaced by garage doors must match existing windows.

Loft conversions

Loft conversions are permitted provided the volume of enlargement (including any previous enlargement) does not exceed the original roof space by more than 40 cubic metres for terraced houses

or 50 cubic metres otherwise

The enlargement is set back 200mm from the original eaves and must not exceed the height of the existing roof. Planning permission is required when exceeding these limits or if the property is a flat or maisonette, a listed building or located in a conservation area.

The houses with chalet roof normally have minimum floor area at upper floor level, the loft conversion with the side dormer will increase the upper floor area same as the ground floor

Porch

Adding a porch to any external door of your house is considered permitted, provided the floor area of the porch, measured externally, does not exceed 3 square metres and the highest does not to exceed 3 metres.

Other factors affecting planning permission for porches include whether or not the property is a flat, maisonette, listed building or located in a conservation area.

Outbuildings

Development of outbuildings are considered permitted and not needing planning permission, provided height of the eaves does not exceed 2.5 metres and the maximum overall height of 4 metres with a dual pitched roof or three metres for any other roof. The footprint of the building should be 2m away from the boundary.

If the outbuilding is built within 2m of the boundary, the outbuilding’s total height must not exceed 2.5m.

No more than half the area of land around the “original house”* may be covered by additions or other buildings.

Granny annex

The granny annex is becoming a hugely popular way to care for elderly relatives. With a granny annex, a portion of the main house is sectioned off from the rest to provide a self-contained living area that includes a kitchenette and bathroom. They might have separate entrances, or share the main entrance, but they are used ancillary to the main dwelling.

Driveway

Flat conversions

More homeowners are converting their homes into flats as demand grows for flats in London. Splitting the property into units helps to increase rental income and increase property value. New dwelling units must be designed to create satisfactory living conditions in terms of room sizes, layout and outdoor amenity space.