For the purposes of this Part the work required to reinstate a defective dwelling is the work relating to the dwelling that is required to be done to the building that consists of or includes the dwelling in order to deal satisfactorily with the qualifying defect, together with any further work—
required to be done, in order to deal satisfactorily with the qualifying defect, to any garage or outhouse designed or constructed as that building is designed or constructed, being a garage or outhouse in which the interest of the person eligible for assistance subsists and which is occupied with and used for the purposes of the dwelling or any part of it, or
reasonably required in connection with other work falling within this subsection.
In any case where—
the most satisfactory way of dealing with the qualifying defect is substantially to demolish the building that consists of or includes the defective dwelling or a part of that building, and
it is practicable to rebuild the building or part concerned on, or substantially on, its existing foundations and reconstruct the dwelling to the same, or substantially the same, plan,
the work required to carry out those operations shall be regarded for the purposes of this Part as work required to reinstate the defective dwelling.
In this Part "associated arrangement" means an arrangement which is entered into in connection with the execution of the work required to reinstate a defective dwelling and is likely to contribute towards the dwelling being regarded as an acceptable security by a lending institution.