Single Storey Extensions

Single Storey extensions are permitted providing:

• No more than half the garden area (the land within the domestic curtilage) is covered by additions, extensions, other buildings, tanks or pools.  The extension is no higher than the highest part of the roof of the existing dwellinghouse.
  
• The eaves height is no higher than the existing eaves.
  
• The extension does not project beyond any wall which is the principal or side elevation of the original dwellinghouse and which fronts a highway.
  
• The extension does not project beyond any rear wall of the original dwelling house by more than 4 metres if the house is detached or 3 metres if the house is semi detached or one of a terrace.
  
• The extension is not more than 4 metres in height.
  
• Eaves are no higher than 3 metres above ground where the extension is sited within 2 metres of any boundary.
  
• A side extension is no wider than half the width of the original dwellinghouse.
  
• The extension does not have a veranda, balcony or raised platform.
  
• The external materials match the existing dwelling unless the extension is a conservatory when timber, glazed walls and glazed or polycarbonate roofs are allowed.

Special restrictions apply in the following areas:

Two Storey Extensions

Two storey extensions are permitted providing:

• No more than half the garden area (the land within the domestic curtilage) is covered by additions, extensions, other buildings, tanks or pools.
  
• The extension is not higher than the highest part of the roof of the existing dwellinghouse.
  
• The eaves are not higher than the existing eaves.
  
• The extension does not project beyond any wall which is the principal or side elevation of the original dwellinghouse and which fronts a highway.
  
• The extension does not project beyond any wall which forms the side elevation of the original dwellinghouse.
  
• The extension does not project beyond any rear wall of the original dwelling house by more than 3 metres.
  
• The extension is not closer than 7 metres to any boundary opposite any rear wall of the dwellinghouse.
  
• The extension is not within 2 metres of any boundary and has eaves higher than 3 metres.
  
• The extension does not include any veranda, balcony or raised platform.
  
• The external materials match the existing dwelling.
  
• Any upper floor window in side wall or roof slope has obscure glazing and is non-opening unless the opening part is more than 1.7 metres above the floor level.
  
• The roof pitch is the same as the original dwelling house.

Special restrictions apply in the following areas:

• A side extension.
• A two storey rear extension.

Definitions

Dormers and hip to gable enlargements

• No part of the dormer is higher than the existing roof.
• No dormer is built on the roof slope of the principal elevation of a dwellinghouse which fronts a highway.
• The total cubic content of the all dormers or other roof enlargements or additions does not exceed 40 cubic metres if on a terraced house or 50 cubic metres if it is a semi detached or detached dwellinghouse.
• The alteration or addition does not include any veranda, balcony or raised platform.
• The materials used match those used for the existing dwellinghouse.
• The edge of the dormer is a minimum of 200 millimetres back from the eaves of the original roof, unless it forms a hip to gable enlargement.
• Any window in side wall or roof slope has obscure glazing and is non-opening unless the opening part is more than 1.7 metres above the floor level.

Interpretation

Any other alteration to a roof

• The alteration does not protrude more than 150 millimetres beyond the plane of the roof measured in the perpendicular.
• Any alteration is not higher than the highest part of the original roof (usually the ridge)
• Any side facing window has obscure glazing and is non opening unless the opening part is more than 1.7 metres above the floor level.

Improvements or other alterations to a dwelling

• The materials used in any external work are a similar appearance to the existing.
  

Special restrictions apply in the following areas:

Porches

• The ground area measured externally does not exceed  3 square metres.
• No part of the porch is more than 3 metres above ground level.
• No part of the porch is within 2 metres of any boundary of the curtilage with a highway.

Provision or replacement of a hard surface

• It is for a purpose incidental to the enjoyment of the dwellinghouse.
• Where the hard surface is on land between the principal wall of the dwellinghouse and the highway, the area covered or replaced shall not exceed 5 square metres unless the hard surface is made of porous materials, or provision is made to direct surface water run off to a permeable or porous area within the curtilage of the dwellinghouse.

Installation, alteration or replacement of a chimney, flue or soil and vent pipe

• The top of any chimney, flue or soil and vent pipe is no higher than 1 metre above the highest part of the roof of the dwellinghouse.

Special restrictions apply in the following areas:

Development within the curtilage of a dwellinghouse

• The development is for purposes incidental to the enjoyment of the dwellinghouse.
• No more than 50% of the curtilage is covered by such development.
• No development is sited on land forward of the principal wall of the original dwellinghouse.
• The building is single storey only.
• The height of the development does not exceed 4 metres above ground level if it has a dual pitch roof, or 2.5 metres if it is within 2 metres of the boundary of the curtilage, or 3 metres in any other case.
• The eaves are not higher than 2.5 metres above ground level.
• The capacity of any container or tank does not exceed 3,500 litres.
• The total area of ground covered by buildings, enclosures, pools and containers does not exceed 10 square metres if sited more than 20 metres from any wall of the dwellinghouse where the site lies within any conservation area.
• No development is sited between the side elevation and boundary in a conservation area.
• None of the development relates to the provision of a dwelling.

This Class does not allow:

• The construction of a building, enclosure or container within the curtilage of a listed building.
• The provision of a veranda, balcony or raised platform.

Definitions

• The height is no greater than 1 metre above ground level where the fence etc is adjacent to a highway used by vehicular traffic
• The height is no greater than 2 metres above ground level elsewhere.
• Where it is being replaced the height of the fence, wall etc does not exceed its former height.

Microwave antenna on a dwelling house or within its curtilage

• There are no more than 2 antennas.
• No antenna is longer than 100 centimetres and only is1 longer than 60cm.
• No antenna on a chimney is longer than 60 centimetres.
• No antenna on a chimney must protrude above the chimney.
• No antenna has a capacity larger than 35 litres.
• No antenna on a roof without a chimney is higher than the highest part of the roof.
• No antenna on a roof with a chimney is higher than the top of the chimney or 60 centimetres above the highest part of the ridge tiles whichever is the lower.
• No antenna is sited on a wall or roof slope facing onto and visible from a highway in a conservation area.

Special restrictions apply in the following areas:

Domestic microgeneration equipment

Solar PV or solar thermal equipment

• The equipment does not protrude more than 200 millimetres beyond the wall or the roof slope.
• No part of the equipment protrudes above the highest part of the roof.
• The equipment is sited to minimise its effect on the external appearance of the building.
• The equipment is sited to minimise its effect on the amenity of the area.
• The equipment is removed as soon as reasonably practicable when no longer needed for microgeneration.

Special restrictions apply in the following areas:

Stand alone solar equipment

• There is no more than one piece of equipment.
• No part of the equipment is higher than 4 metres above ground level.
• No part of the equipment is sited within 5 metres of the curtilage boundary.
• The surface area of the solar panels does not exceed 9 square metres.
• No dimension exceeds 3 metres.
• It is not sited within the curtilage of a listed building.
• The equipment is sited to minimise its effect on the amenity of the area.
• The equipment is removed as soon as possible when no longer needed for microgeneration.

Special restrictions apply in the following areas:

Ground souce heat pump

The installation, alteration or replacement of a ground source heat pump is permitted subject to the following condition:

• No part of the heat pump or its collection system shall be sited outside the curtilage of the dwellinghouse.

Water source heat pump

• No part of the heat pump or its collection system is sited outside the curtilage of the dwellinghouse.

Flue forming part of a biomass heating system

The installation, alteration or replacement of a flue, forming part of a biomass heating system on a dwellinghouse is permitted provided:

• The height of the flue shall is not more than 1 metre above the highest part of the roof.

Special restrictions apply in the following areas:

Definitions

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