Hummelstone Pty Ltd v Mountford

Hummelstone Pty Ltd (the appellant) appealed to the High Court of Australia against a decision of the Supreme Court of Victoria. The dispute concerned the interpretation of a restrictive covenant contained in a transfer of land, which purported to prohibit the erection of any building other than a single private dwelling house. The appellant sought to build a block of flats on the land, which it argued was permissible under the covenant. The respondent, a neighbour, contended that the proposed development breached the covenant.

The High Court was required to determine whether the phrase "a single private dwelling house" in the restrictive covenant permitted the erection of a block of flats. This involved considering the ordinary meaning of the words used in the covenant and the principles of construction applicable to restrictive covenants, particularly in the context of land development. The court also had to consider whether the covenant, if interpreted as prohibiting flats, was void for uncertainty or repugnant to the grant.

The High Court, by majority, held that the phrase "a single private dwelling house" referred to the *user* of the building, not its *structure*. Their Honours reasoned that a block of flats, while comprising multiple dwelling units, could still be considered a single private dwelling house in the sense that it was intended for private occupation and not for commercial or public use. The court applied the principle that restrictive covenants should be construed according to their plain and ordinary meaning, but also acknowledged that such covenants should not be interpreted in a way that unduly fetters the use of land without clear and unambiguous language. The majority found that the covenant did not clearly prohibit the erection of a building containing multiple dwelling units.

The appeal was allowed, and the orders of the Supreme Court of Victoria were set aside.