You've just received a home inspection report that runs thirty-plus pages, packed with photos, checklists, and terminology you've never seen before. Whether you're buying a home in Mississauga, selling a semi-detached in East York, or refinancing a property in Hamilton, understanding what that document actually means is one of the most practical skills an Ontario homeowner can have. This guide walks you through the structure of a typical report, how to prioritise findings, and when to bring in a licensed professional to follow up.
What a Home Inspection Report Is — and What It Isn't
A home inspection is a visual assessment of a property's condition at a specific point in time. In Ontario, inspectors are not currently required to hold a provincial licence under a dedicated regulatory body, though proposed legislation under the Home Inspection Act, 2017 has signalled future oversight. Reputable inspectors typically hold credentials from recognised associations and carry errors-and-omissions insurance. The report they produce is a snapshot — not a guarantee, not a code-compliance certificate, and not a substitute for specialist assessments when serious issues are flagged.
Understanding the Report's Structure
Most Ontario inspection reports follow a consistent layout. Familiarise yourself with these standard sections:
- Summary page: A condensed list of the inspector's most significant findings. Read this first, but never stop here — the summary omits context that matters.
- Roof and exterior: Covers shingles, flashing, eavestroughs, grading, driveways, and cladding.
- Structure and foundation: Includes the basement, crawl space, framing, and any visible signs of movement or moisture intrusion.
- Electrical systems: Panel capacity, wiring types (notably knob-and-tube or aluminum wiring), grounding, and GFCI protection in wet areas.
- Plumbing: Water supply lines, drain materials, hot water equipment, and visible signs of leaks or corrosion.
- Heating, ventilation, and air conditioning (HVAC): Furnace age and condition, ductwork, air conditioning, and ventilation adequacy.
- Insulation and vapour barriers: Particularly relevant in Ontario's climate, where thermal performance directly affects energy costs.
- Interior: Walls, ceilings, floors, windows, doors, and stairs.
Each section typically uses a rating system — common ones include satisfactory, monitor, requires repair, and requires further evaluation. Know your inspector's legend before you interpret anything.
How to Prioritise the Findings
Not every finding carries the same weight. A useful way to triage the list is to sort findings into three buckets:
1. Safety and Structural Issues — Act First
These are non-negotiable and typically require a licensed specialist before you proceed. Examples include a compromised foundation, active water infiltration in the basement, evidence of carbon monoxide risk from a cracked heat exchanger, or unsafe electrical conditions. In Ontario, electrical work must be permitted and inspected by the Electrical Safety Authority (ESA). Gas appliance work — furnaces, boilers, fireplaces — falls under the Technical Standards and Safety Authority (TSSA). Never assume a handyperson can legally complete this type of work.
2. Systems Nearing End of Life — Plan and Budget
Inspectors frequently note the approximate age of major systems. A furnace that is eighteen years old or a roof that has seen twenty-two Ontario winters may still be functional today but represents a near-term capital cost. Use these notes to build a realistic maintenance budget. In the GTA, replacing a mid-efficiency furnace with a high-efficiency unit, for example, is a significant expense once equipment, labour, and HST at 13% are included.
3. Maintenance Items — Schedule Them
Caulking around windows, a sticking door, minor efflorescence on a basement wall, or a slow bathroom drain fall into this category. They matter, but they don't require urgent specialist attention. Keep a running list and address them seasonally.
Key Ontario-Specific Issues to Watch For
Certain findings are particularly common in GTA and broader Ontario housing stock and deserve extra attention:
- Knob-and-tube wiring: Found in many pre-1950s homes across Toronto's older neighbourhoods. Insurers often require full replacement or a specific ESA inspection before offering coverage.
- Aluminum wiring: Common in homes built from the mid-1960s to mid-1970s. Requires remediation by an ESA-licensed electrician.
- Clay or cast-iron sewer laterals: Older GTA homes may have original sewer pipes prone to root intrusion and collapse. A sewer scope (a separate camera inspection) is worth commissioning if the inspector flags concerns.
- Vermiculite insulation: Some Ontario homes from the 1950s through 1980s contain vermiculite attic insulation that may be contaminated with asbestos. This requires professional testing before any disturbance.
- HVAC fuel conversions: With ongoing transitions from oil to gas or to heat pump systems in Ontario, inspectors may note outdated or decommissioned equipment. Any new gas line work requires a TSSA-licensed contractor.
When to Call in a Specialist
A home inspector's job is to identify, not to diagnose in depth. When a report flags electrical concerns, the follow-up belongs with an ESA-licensed electrician. Structural questions may require a structural engineer. Mould or air quality concerns warrant an industrial hygienist. Trades in Ontario — electricians, plumbers, HVAC technicians — should carry WSIB coverage and hold the appropriate Ontario College of Trades (OCOT) credentials for their trade classification. Verifying these credentials before hiring protects you legally and financially.
Using the Report as a Negotiation Tool
In a purchase transaction, the inspection report is a legitimate basis for renegotiating price or requesting that deficiencies be remedied before closing. Focus your asks on safety and structural findings rather than routine maintenance items — buyers who flag every minor note risk losing credibility with sellers. Have a licensed contractor provide a written quote for significant repairs so your negotiation is grounded in real numbers.
Keeping the Report for the Long Term
Store your inspection report digitally and revisit it annually. Many homeowners discover, after living in a home for a year, that a flagged item they dismissed has worsened exactly as the inspector predicted. The report is a living reference document, not a one-time read.