Restrictions on relevant expenditure to be taken into account: general
3.—(1) The maximum amount of the relevant expenditure which may be taken into account in calculating the deduction is £1,500 per dwelling-house.
(2) Paragraph (1) applies irrespective of the number of persons incurring relevant expenditure or entitled to a deduction in respect of a dwelling-house.
(3) If the person entitled to the deduction has received a contribution from any other person towards the relevant expenditure incurred, that contribution shall be excluded in calculating the relevant expenditure incurred by the person entitled to the deduction.
(4) Further rules (to be applied in the order stated) are set out in—
(a)regulation 4 (first further rule: apportionment of relevant expenditure benefiting more than one property);
(b)regulation 5 (second further rule: restriction of relevant expenditure to the maximum amount);
(c)regulation 6 (third further rule: apportionment of relevant expenditure if a dwelling-house or building is owned jointly or in common or is subject to differing estates or interests).