Improvement or alteration to a dwellinghouse that is not an enlargement

There are many types of alterations or improvements to a dwellinghouse that are not enlargements, and the most common types are described in 2 classes.

Access Ramps

This class typically relates to the construction of ramps to assist access for disabled people.

This class permits small ramps to be attached to any external door of a dwellinghouse so long as the ramp is not higher than 0.4 metres or longer than 5 metres.  The overall length of the ramp and landings cannot be longer than 9 metres.  The combined height of the ramp and any handrail cannot exceed 1.5 metres.

Scottish Building Standards require ramps to be constructed to be safe to use. Supporting guidance advises on how this can be achieved and includes information such as suitable gradients and lengths of ramp. See section 4.3 of the Scottish Building Standards Technical Handbook

There are no permitted development rights for ramps in a conservation area or within the curtilage of a listed building. Listed building consent is required if the proposed access ramp affects the character of a listed building.

For more information on the limitations for this class please see the Circular.

Improvements or alterations that are not enlargements, including replacement windows, solar panels, flues and satellite dishes

Developments within this class include replacement windows and doors, satellite dishes, cladding, painting and new flues. This class also covers the installation of domestic microgeneration equipment; in particular the installation, alteration or replacement of solar PV or solar thermal equipment. This class is best visualised as a 1 metre bubble surrounding the walls and roof of the dwellinghouse. A householder can add a wide range of different types of development without having to apply for planning permission. Permitted development rights for wind turbines and air, ground and water source heat pumps as well as flues for biomass heating and combined heat and power systems are covered in other classes. Balconies, roof terraces or raised platform are specifically excluded from this class.

There are no permitted development rights for this class in a conservation area . Listed building consent is required if the proposed extension affects the character or setting of a listed building.

A building warrant from the local authority may be required for some of the development permitted by this class.

For more information on the limitations for this class please see the Circular.