Can my neighbour build an extension without planning permission?
In most cases, if the property is a single dwelling house (and not flats) then your neighbour may erect an extension (including a conservatory) within certain size restrictions. There are a number of restrictions and limitations. Although some of the size limitations are explained below, given the complexity of the legislation, you should seek confirmation by contacting thePlanningTeamor visiting the Planning Portal website for more comprehensive details or specific advice. For further information, view the The Town and Country Planning (General Permitted Development) Order 1995online. – If the property is within a Conservation Area or is a terraced house, the total volume of the extension(s) must not exceed 50 cubic metres, or 10 percent of the original dwelling house, whichever is the greater. – In any other case, the total volume of the extension(s) must not exceed 70 cubic metres, or 15 percent of the original dwelling house, whichever is the greater. This volume is the total allow
