BUILDING (PRIVATE STREETS AND ACCESS ROADS) REGULATIONS
Width of access roads
(1) Save as provided in paragraph (2), the width of the carriageway of every access road shall be not less than 5 m and the width of the footpath therein shall be not less than 1.6 m.
(a) an access road provides or will provide access to not more than 12 separate buildings or not more than 24 flats, whether such flats are in the same building or not; and
(b) the aggregate of the areas of the floors in all the buildings or flats does not exceed 3500 m2; and
(c) spaces, to enable vehicles to pass, are provided at distances along the access road not exceeding 60 m in length,
the width of the carriageway of the access road may be not less than 2.75 m and the width of the footpath not less than 1.5 m.