"(1) A person taking on work for, or in connection with, the provision of a dwelling (whether the dwelling is provided by the erection or by the conversion or enlargement of a building) owes a duty (a) if the dwelling is provided to the order of any person to that person ... to see that the work that he takes on is done in a workmanlike, or as the case may be, professional manner with proper material, and so that as regards that work, the dwelling will be fit for habitation when completed."
"It may that be proper work with good materials will usually produce a house which is fit for habitation, but it is possible to imagine cases in which, however skilful the work and however good the materials, there is some defect of design or layout which makes the resulting dwelling unsuitable for its purpose."
"38. I conclude on the authorities that I must construe the Act with the following considerations in mind: i) The finding of unfitness for habitation when built is a matter of fact in each case. ii) Unfitness for habitation extends to what Lord Bridge described as "defects of quality" rendering the dwelling unsuitable for its purpose as well as to "dangerous defects". iii) Unfitness for habitation relates to defects rendering the dwelling dangerous or unsuitable for its purpose and not to minor defects. iv) Such a defect in one part of the dwelling may render the dwelling unsuitable for its purpose and therefore unfit for habitation as a dwelling house even if the defect does not apply to other parts of the dwelling. This is also the case under the Housing Act - see Summers v Salford Corporation. v) The Act will apply to such defects even if the effects of the defect were not evident at the time when the dwelling was completed. vi) In considering whether or not a dwelling is unfit for habitation as built one must consider the effect of the defects as a whole."
"176. I have already rejected the Second Defendant's contention that I should look at each room and decide, whether, in isolation, that room is fit for human habitation, and if it is, I should exclude it from further consideration. Based on the previous court decisions to which I have referred, I am satisfied that my approach should be a different one. The test under the DPA is whether or not the house is fit for habitation as built. The experts agree that the house as built suffered from a fundamental defect namely the inadequacy of the foundations. The results of this defect did not manifest themselves immediately but have done so since 2002 and are continuing. The defects reached Category 4 of the BRE Digest scale of seriousness. 177. Considering the defects as a whole, the house has suffered from widespread cracking as a result of heave. By the time the effects will have been concluded, the cracking will have continued for 14 years on Mr Edward's evidence and for up to 20 years on Mr Allen's evidence (which I have already preferred). The only way, to be certain of stopping the heave immediately and providing the house with the stable foundation, which Mr and Mrs Bole could reasonably have expected when they bought the house, is to underpin it. This would necessitate Mr and Mrs Bole moving out of the house for up to 12 months. It is an indication of the extent of the damage to be repaired that, even on Mr Edward's solution, Mr and Mrs Bole would still have to move out of the house for up to 6 months so that the current damage could be repaired. 178. This follows repairs in 2002, 2006 and 2007 with a certainty of at least one more round of repairs before the effects of the heave are finally extinguished. In between repairs, the cracks open up making Mr and Mrs Bole's home unsightly. In some aspects, for the reasons which Mr Allen sets out, the property as built was also potentially dangerous. 179. In all the circumstances, applying the test of whether the house was unfit for habitation in the sense of being unsuitable for its purpose, I have no hesitation in finding that the house, as built, was unfit for habitation under Section 1 of the DPA in that it was built with unstable foundations which resulted in movement and cracking and other defects caused by heave."
"188. It also seems to me, and I find, that even on the basis that it is agreed that some further movement will take place, but the extent must remain, at best, a matter for speculation, it is entirely reasonable for Mr and Mrs Bole to insist that the piled raft solution is proceeded with now even though the cost will be considerably in excess of the alternative solution. Mr and Mrs Bole have already suffered a great deal over the last 7+ years in terms of living with cracking and remedial work to the property and it is entirely reasonable for them now to insist that the foundations should be put in a stable condition and that these problems should be brought finally to an end. This point is reinforced by the fact that if I was to accept Mr Edward's solution that there is no certainty as to the extent of future movement of the property or the extent of the repairs which will be required at some time in the future. This reinforces my view that Mr and Mrs Bole are reasonable to insist on the piled raft solution being done now."
"174. Likewise I have no difficulty in accepting that the defects to the garage doors are due to heave. Mr and Mrs Bole have tried unsuccessfully to re-hang the doors. They are and have been for many years unable to lock the door. As a consequence the garage cannot be used for storage of any valuables."