Where two or more separately rateable properties with the same use are deemed to be contiguous for the purposes of section 20 of the Local Government (Rating) Act 2002, but are subject to more than one differential rate, then for the purpose of determining a single differential rate, the component areas shall be totaled, and such total, together with the zoning/use of the properties, shall determine the appropriate differential classification.

As regards the charging of a Uniform Annual General Charge and service availability charges, two or more rating units must be treated as 1 unit for setting a rate if those units are:

(a)  owned by the same person or persons; and

(b)  used jointly as a single unit; and

(c)  contiguous or separated only by a road, railway, drain, water race, river, or stream.

Please note that the term 'contiguous' means "adjoining; next to; sharing a common boundary".