June 2026

Investment Property Appraisal Guide How Appraisers Value Multi-Unit Properties in Ontario Seven Appraisal Inc. Toronto & Greater Toronto Area Income Property Methodology Contents What Counts as a Multi-Unit Property The Three Approaches to Value The Income Approach & NOI The Direct Comparison Approach The Cost Approach Key Factors That Shape Value Documents an Appraiser May Review Common Reasons for an Appraisal Buying a duplex, triplex, or larger rental building is a fundamentally different decision than buying a home to live in. You are not choosing a place based on how the kitchen feels or whether the backyard suits your family. You are acquiring an income-producing asset, and the value of that asset is tied directly to what it earns, what it costs to operate, and what investors in your market are willing to pay for that income stream. This is why multi-unit properties are valued differently than owner-occupied homes, and why understanding how appraisers approach these assignments matters if you own one, are thinking about buying one, or need a formal valuation for financing, tax, legal, or estate purposes. What Counts as a Multi-Unit Property For appraisal purposes, multi-unit residential properties generally include duplexes, triplexes, fourplexes, fiveplexes, and larger multiplexes. Smaller buildings with two to four units are often analyzed using a blend of residential and investment methodology. Larger buildings of five units and above shift more fully into commercial appraisal territory, where the income approach dominates the analysis. Across the GTA, these properties appear in every form imaginable. A converted Victorian in Leslieville with three stacked units. A purpose-built fourplex in North York. A six-unit walk-up apartment building in Scarborough. A newer multiplex in Mississauga built specifically to generate rental income. Each of these requires an appraiser who understands both the physical property and the investment dynamics of the local rental market. The Three Approaches to Value Professional appraisers use up to three recognized approaches when valuing a property. For multi-unit residential buildings, each approach plays a different role, and the weight given to each depends on the specific property and the quality of available data. Our guide on the three approaches to calculating property value gives property owners useful context for how this methodology fits within the broader appraisal framework. The Income Approach and Net Operating Income For income-producing properties, this is usually the most important approach. It is grounded in a simple principle: the value of an investment property is directly connected to the income it generates. An appraiser using the income approach works through the following analysis. How Net Operating Income Is Calculated Starting PointGross Potential Income Total rent collected across all units at full occupancy −Vacancy & Credit Loss Allowance — units that may be empty or rent occasionally uncollected = After VacancyEffective Gross Income Realistic income after accounting for vacancy and collection loss −Operating Expenses — property taxes, insurance, maintenance, management, utilities, capital reserves = The Key FigureNet Operating Income (NOI) Annual profit after all operating costs — the figure that most directly drives value Capitalization Rate Formula Value = Net Operating Income ÷ Capitalization Rate A higher NOI produces a higher value. A lower NOI produces a lower one. The relationship is direct and transparent. Understanding Capitalization Rates The Cap Rate Reflects What Investors Are Currently Accepting as a Return If comparable multi-unit buildings in a Toronto neighbourhood are trading at a 5 percent cap rate, an appraiser divides the subject property’s NOI by that rate to produce a value. Cap rates vary based on property type, location, tenant quality, and current market conditions. They are determined by researching what investors have actually paid for comparable income-producing buildings in the same area. This is why two buildings that look identical can carry very different values — if one generates higher NOI or is in an area where investors accept lower cap rates due to stronger demand, the income approach will reflect those differences directly in the final value conclusion. The Direct Comparison Approach Even for income-producing properties, appraisers look at what comparable buildings have actually sold for in the market. The appraiser identifies recently sold multi-unit properties that are reasonably similar to the subject in terms of location, number of units, building size, age, condition, and income characteristics. Adjustments are made for the differences between each comparable and the subject property — a comparable with higher rental income gets a downward adjustment, one in a less desirable location gets an upward adjustment. The challenge with this approach for larger multi-unit properties is that comparable sales can be limited, especially outside the core Toronto market. That is one of the reasons the income approach often carries more weight for investment properties. But where good comparable sales data exists, the direct comparison approach adds valuable market context to the analysis. The Cost Approach The cost approach estimates value by calculating what it would cost to replace the building at current construction costs, then subtracting depreciation for age, wear, and functional issues, and adding the land value. For older multi-unit buildings, this approach tends to produce a value that does not reflect how investors actually buy and sell income properties — as a result, it carries less weight in most multi-unit appraisals. Where the cost approach is more useful is in situations involving newer construction, insurance replacement cost assessments, or properties where the income and comparison data is limited. In those cases it provides a supporting reference point rather than a primary value indicator. Key Factors That Shape Multi-Unit Property Value Rental Income and Net Operating Income The single most important driver of value. Two buildings that look identical can carry very different values if one has rents at market levels and the other has long-term tenants paying below what a vacant unit would attract today. Under Ontario’s Residential Tenancies Act, sitting tenants are subject to rent control guidelines, and below-market rents show up directly in the appraised value. Occupancy and Tenant Profile A fully occupied building with stable, long-term tenants generates predictable income and