difference in value of property, or cost of cure?
for defendant to recover cost of cure, damages as cost of carrying out work was
out of all proportion to benefit defendant would gain.
important to question of reasonableness – where aggrieved party not genuine in
his desire to carry out repairs, this will count against award of cost of cure damages.
possible however for modest sum to be awarded by way of damages for breach of
contract based on loss of amenity.