“The rateable value of a non-domestic hereditament … shall be taken to be an amount equal to the rent at which it is estimated the hereditament might reasonably be expected to let from year to year on these three assumptions: (a) The first assumption is that the tenancy begins on the day by reference to which the determination is to be made; (b) The second assumption is that immediately before the tenancy begins the hereditament is in a state of reasonable repair, but excluding from this assumption any repairs which a reasonable landlord would consider uneconomic; (c) The third assumption is that the tenant undertakes to pay all usual tenant’s rates and taxes and to bear the cost of the repairs and insurance and the other expenses (if any) necessary to maintain the hereditament in a state to command the rent mentioned above.”
“Accordingly, the hypothetical landlord would have known that, if he did not carry out the repairs immediately, he would need to carry them out in no more than five years time. Meanwhile, the appeal property would be let, if at all, to a tenant who was prepared to occupy a building in very poor condition at a reduced rent. Such a tenant is likely to have been less reliable than one who could be secured if the property was in reasonable condition and there would be a real risk of rental voids during the five year period. Against that background I accept the valuation officer’s opinion that the present value of the landlord’s interest assuming the works were carried out immediately, less the cost of carrying them out, would have significantly exceeded the present value in disrepair.”
“The Tenant’s Proportion of all Outgoings relating to the Building [of which the appeal hereditament forms part] and of the costs incurred by the Landlord in complying with the covenants on its part contained in the Superior Lease relating to the repair and maintenance of the Common Parts [which include the roof of the Building] save that the Tenant shall not be required to contribute towards the cost of repairing or maintaining the roof of the Building”