Aberdeenshire Council’s July 2026 note is a non-statutory local interpretation for proposals within an existing domestic curtilage or garden. It distinguishes incidental uses, ancillary accommodation, and proposals treated as a new dwellinghouse. It does not establish a Scotland-wide rule or decide how a particular property will be classified.
Describe how the space will be used
The Council uses “incidental” for a complementary use such as a home office, gym, or hobby space. “Ancillary accommodation” means additional primary accommodation associated with the main dwelling. A detached building with sleeping, cooking, washing, or living facilities is not automatically a new dwellinghouse just because someone could live independently in it. The Planning Service considers the facts and degree of connection to the principal dwelling, including the planning history, facilities, intended use, scale and design, privacy, amenity, and whether a separate planning unit or curtilage would be created.
The route also depends on what is already built and what work is proposed. The guidance says an existing building in the established domestic curtilage can be used for an incidental or ancillary purpose without a change of use, although physical alterations may still need planning permission. An extension can include primary accommodation, but remains part of the existing planning unit; subdivision into separate dwellings requires approval. For a new standalone structure, permitted-development rights described in the note cover incidental use, while extra primary accommodation is treated as ancillary and requires planning permission. If the Council cannot accept the proposal as ancillary, it is assessed as a separate dwellinghouse.
Ask the Council to confirm the route
Before filing, document the proposed facilities and use, the structure’s relationship to the main home, the planning history, site layout, and any intended access or boundary changes. Aberdeenshire strongly encourages pre-application advice or its “Do I need planning permission” form. Ask the Planning Service to confirm in writing whether the proposal is not development, permitted development, ancillary accommodation requiring an application, or a separate dwellinghouse. Building-warrant requirements are a separate question for the relevant verifier.
The note is local, non-statutory guidance and cannot cover every scenario. A written planning view for one site does not determine building standards, code compliance, fees, or approval at another Scottish authority. For the wider nation-by-nation context, see the four-nation approval route guide.