“.... ‘hereditament’ means property which is or may become liable to a rate, being a unit of each property which is, or would fall to be, shown as a separate item in the valuation list...”
“The facts in the instant case are that at the relevant date the ratepayers were in actual physical occupation of those parts of the premises covered by the proposal. At the date of the proposal part of the second floor with which I am not concerned was let out and the rest of the building was empty. The upper portions not occupied were capable of being let out and separately occupied and agents had in fact been instructed to let them. These lettings have subsequently been made. The only material physical change has been the installation of separate electricity meters for the different occupiers.”
“It follows from this line of authority that in my judgment applying what I would call the normal rules the part occupied by the ratepayers can properly be described as a hereditament being occupied by a single occupier for a single purpose. No one suggests in the present case that the fifth to tenth floors should be separately assessed 10 from the lower ground, ground and first floors on the grounds that they are not contiguous. With that possible qualification the occupied premises satisfy the definition of hereditament contained in s 115 of the Act which, in the alternative form, means property which may become liable to a rate being a unit of such property which would fall to be shown as a separate item in the valuation list. The whole building cannot in my opinion be said to satisfy this definition and not only because at the date of the proposal part of the second floor had been let out. The unoccupied part of the building being capable of separate occupation cannot in my judgment be said to be part of a hereditament of the occupied part since it cannot be said that it was occupied for the same purpose as the rest nor was it in fact occupied at all.”
“The hereditaments included in any valuation list are, as I understand the matter, units of assessment, that is to say, in the case of corporeal hereditaments (with which alone I am concerned), pieces of land which are treated separately for the purpose of charging their occupiers to rates in respect of their occupation of them. The physical character, the appearance and the user of a corporeal hereditament may change enormously though its boundaries remain the same. Buildings may be erected where there was none before; buildings may be pulled down and not replaced; what was agricultural land may become a factory or a house; and what was a factory or a house may become agricultural land. The changes may result in an increase or a decrease in the rateable value of the hereditament or in a change in its description; but I can see no reason why, so long as the same piece of land appears in the list as a unit of assessment, it should not remain the same ‘hereditament’ notwithstanding any such changes. If the boundaries of the unit change, if part of the unit is sold and becomes itself a new hereditament, as would, for example, happen here if the ratepayers assigned its leasehold interest in the animal house to another person, or if the unit becomes larger by the addition of further land to it, then the question whether the ‘hereditament’ has preserved its identity may become acute. I can conceive of several different answers being given. It might be said that any and every change in size, however trifling, resulted in a new hereditament. Again, it might be said that the substance of this matter should be looked at and that if the piece of land which was now the unit was substantially the same piece of land as formed the old unit, the small addition or subtraction which had occurred should be neglected.”
“It was indeed submitted by the defendant corporation as an alternative to its main argument that what was originally brought into rating, apart from the animal house, was 12 simply the site of the one laboratory and the service section and that it was only when the other three laboratories had been built that the rest of the larger of the two demised plots appeared in the valuation list. In my judgment the facts do not justify this contention. There never was any physical boundary on the larger plot separating the part on which there were no buildings from the part which was built on, and even if one neglects the evidence as to the placing of hutches on part of the vacant land and treats it as all being in fact unused between 1952 and 1958, there would still be no justification for treating it as not forming part of the hereditament in the valuation list until 1959.”