Relevant court decisions when a seller is  sued for problems with  property which are discovered  after buyers take  possession of a home. 
In the context of real estate transactions it generally is accepted  that the closing of the transaction extinguishes contractual rights  which may exist prior to closing and the principle of caveat emptor, or ‘let the buyer beware’ applies. Recent court cases show some exceptions to this rule.Temple v. Thomas                                           Alberta Court of Queen’s Bench
            Mr. Thomas listed his property as newly renovated. The  renovations were not performed by a skilled tradesperson. It was shown  that 99% of the plumbing had been completed by someone who had no  qualifications whatsoever in plumbing, heating or gas fitting. Most of  these defects were easily visible to a trained inspector or  tradesperson. The renovation had been completed without any regard for  building codes and without any of the necessary municipal permits.
            Mr. Thomas was obliged to disclose that the renovation  had been completed without the necessary permits. These defects were  considered latent since the ordinary layperson would not notice improper  wiring and plumbing. Mr. Thomas did not say that the renovations were  up to code, he was silent on the issue. The law is clear that silence  can amount to a fraudulent misrepresentation and it was so decided in  this case.
The nature of the defects resulted in the property being unfit for  habitation. Mr. Temple could not live normally in his newly purchased  house due to the extensive repairs needed to bring the house up to  acceptable and legal standards. These factors create an exception to the  principle of caveat emptor and Mr. Thomas was held liable for the repair bill of $22,621.57.
Calder v. Martin                                              Alberta   Provincial Court
Renovations that fail to meet building codes requirements and lack of  appropriate permits and/or approvals can result in a vendor not being  able to rely on the protection of caveat emptor. If a term in  the purchase contract stipulates that the vendor will provide evidence  of municipal permits and inspection, this is a covenant. This covenant  cannot be fulfilled or waived by a home inspection service or an  electrician. To comply with such a covenant a municipal permit or  inspection must be provided to the purchaser.
Whighton v. Integrity Inspections Inc.           Alberta Court of Queen’s Bench
Home inspection services have a duty of care to real estate  purchasers. This is a duty to ensure that not only is the inspection  accurate but also any opinions of the inspector. This broadens the duty  that is outlined in the contract between the inspection service and the  client. Home inspection services and its inspectors must exercise such  reasonable care as the circumstances require to ensure that the  representations made are accurate and not misleading.
House inspection services must meet the standard of care expected of  reasonably prudent home inspectors in similar circumstances at the time  of inspection. The reason for a high standard being applied to home  inspections is the fact that purchasers consistently rely on the reports  in considering purchasing the property.