Buying a duplex, a triplex or a small multi-unit building does not read like buying a single-family home. The stakes are no longer just quality of life, they are profitability and the value of the asset over many years. Here is what an income-property inspection looks at on top of the usual checks, and how to interpret the results like an investor.
Why a plex reads differently
In a house, a defect affects one household. In a plex, the same defect can hit several units at once, interrupt your rental income and trigger repairs on shared components that cost far more. So the inspection keeps an eye on the building’s condition, but also on what could eat into your margin.
Our commercial and multiplex inspection service is built for exactly this view: the condition of the major components, but through an investment lens.
Shared components: the heart of the risk
These are what make the difference between a good year and a bad one. We pay particular attention to:
- The roof and envelope, which protect every unit at the same time
- The structure and foundations, where an active crack affects the whole building
- Shared mechanical systems: central heating, hot water tanks, ventilation
- The main electrical service and how it is split between units
- Distribution plumbing and waste stacks
A single one of these components at the end of its life can mean a major expense. Better to know about it before the offer than to discover it after the purchase.
Multiple units, multiplied defects
Each unit is inspected to the same standard as a house: floors, walls, ceilings, windows, visible plumbing and unit-specific heating equipment. When a building has three or four units, the same construction defect often repeats from one unit to the next. The report helps you tell an isolated problem from a systemic issue that will affect every unit.
What weighs on profitability
Beyond physical condition, some findings have a direct impact on your numbers: energy-hungry heating, poor insulation, basement water infiltration or recurring moisture stains. Thermography is especially useful here, because it reveals insulation defects and infiltration invisible to the naked eye, across several units in a single visit.
Note: the inspection remains a visual examination of accessible components. It does not replace a review of leases, declared income or zoning compliance, which fall to your broker, your accountant and the municipality.
Preparing the visit
For an income property, access is key. Ideally, every unit is reachable on inspection day, including common areas, the mechanical basement and the roof if it is safe. Giving tenants advance notice avoids incomplete visits. Our tips on preparing for a home inspection apply here, simply multiplied by the number of units.
In short
Inspecting a plex means evaluating a building and an investment at the same time. You get an honest picture of the real condition, the shared components that weigh the most, and recommendations sorted by priority so you can negotiate from a position of knowledge. For an income property in the Outaouais, request a quote, we reply the same business day.