This section applies if the terms subject to which a lease is granted impose on the tenant an obligation to carry out work on the premises.

The lease is treated for the purposes of section 217 (lease premiums) as requiring the payment of a premium to the landlord (in addition to any other premium).

The amount of the premium is the amount by which the value of the landlord's estate or interest immediately after the commencement of the lease exceeds what its value would have been at that time if the terms of the lease did not impose the obligation on the tenant.

An obligation, or part of an obligation, that requires the carrying out of excepted work is ignored for the purposes of this section.

Work is “excepted work” if the payment for carrying it out would, if the landlord and not the tenant were obliged to carry it out, be deductible as an expense in calculating the profits of the landlord's property business.