Short answer
A patent defect is one a buyer or inspector could generally identify through reasonable observation and inquiry. A latent defect is hidden and not readily discoverable; disclosure obligations become especially important where the hidden defect makes the property dangerous, potentially dangerous or unfit for habitation. The label can be legally disputed, so buyers should investigate rather than plan to argue about it after closing.
The buyer concern behind the question
A buyer sees a stain, accepts a verbal explanation and later calls the underlying leak “hidden.” The seller argues that the warning sign was visible and the buyer chose not to investigate.
A practical Ontario example
Illustration only: An inspection notes a musty smell and staining but cannot access behind a finished wall. That limitation is not a clean bill of health. The buyer can seek permission for further review, obtain a specialist opinion, negotiate risk or walk away while protected by the offer.
Questions to ask before becoming firm
- What warning signs were observable before the offer became firm?
- Did the inspector record an inaccessible area or recommend follow-up?
- Was anything covered, repaired or represented in a way that may have concealed the problem?
- Would the condition affect safety, habitation, value, insurance or financing?
- Which evidence should the lawyer preserve now?
Practical routes to compare
- Investigate every material limitation before waiver.
- Use specialists where the general inspection cannot answer the question.
- Ask the lawyer to assess disclosure and remedy rather than relying on a casual label.
What each professional can and cannot decide
The Realtor investigates and communicates property facts within the real-estate mandate and advises on offer strategy. The inspector or specialist assesses condition within a defined scope. The lawyer interprets disclosure duties, title, contract language, evidence and remedies. The insurer decides coverage. The appraiser reports value and marketability for the assignment. Rajiv tests qualification, lender property acceptance and closing consequences. RECO regulates Ontario real-estate professionals; it does not set lender underwriting policy. FSRA regulates mortgage-brokering conduct and certain financial sectors; it does not approve the mortgage or create one universal lender policy.
Mortgage and closing consequences
Changed property facts can affect usable rental income, appraisal, insurance, marketability, repair conditions and the amount a lender will advance. Start with a suitable A lender when the borrower and property meet policy. An alternative lender may take a broader view at a higher rate and fee, but still needs acceptable property and evidence. An institutional MIC or private lender may provide a flexible short-term route, including interest-only, amortized, open, partly open or maturity-matched structures in some cases. That route is not an automatic rescue: equity, total cost, legal advice and a credible exit back to suitable A or B financing must be tested.
Verified public guidance
RECO distinguishes patent defects detectable through reasonable observation and inquiry from serious latent defects that are generally not apparent despite reasonable care. Concealment can change the analysis.
Read the primary source. Source checked 2026-09-03. The regulator explains professional obligations and consumer considerations; the lawyer determines legal advice and each lender and insurer applies its own policy.
Pressure-test this answer
The answer may change if the seller did not know the fact, the concern was visible, the buyer received warning signs, the wording was only marketing opinion, records contradict the statement, the defect was concealed, or the agreement allocates the risk differently. A representation can also be important without creating the remedy a buyer expects. Ask what is known, what is assumed, what evidence is missing and which professional is qualified to decide it. Before waiver, compare the cost of investigation with the buyer’s worst reasonable post-closing exposure. After a firm agreement, let the lawyer direct the response.
Evidence and documents to keep
- Listing, photographs, virtual tour and feature sheets
- Offer, schedules, amendments and condition deadlines
- Seller information statements and written questions and answers
- Inspection, specialist, municipal, permit and insurance records
- Rental or service contracts, invoices and warranties
- Emails, texts, appraisal or lender requirements and lawyer correspondence
Related AskRajiv guidance
Continue with home inspection condition waiver hidden defects ontario, seller disclosure material facts home buyer ontario.
Get the property facts aligned with the mortgage
Use Rajiv’s direct mortgage strategy form. Include the property concern, purchase price, closing date, current conditions and documents already available.
Source and review
Reviewed by Rajiv Verma, Mortgage Broker on 2026-09-03. Educational information only; not legal, real-estate, inspection, engineering, environmental, insurance, appraisal or mortgage approval advice.