Paragraph 20 Buildings ancillary to flats or maisonettesF1
A detached single storey building ancillary to and within the curtilage of a flat or maisonette. Except–A building exceeding 8 square metres in area. A building within 1 metre of the flat or maisonette or within 3 metres of any other part of the building containing the flat or maisonette. A building within 1 metre of a boundary. A building containing a flue, a fixed combustion appliance installation or sanitary facility. A wall or fence. A swimming pool deeper than 1.2 metres.