What's my home worth in the East GTA — and why an algorithm can't tell you

If you’ve ever typed your address into a website and watched a dollar figure appear, you’ve met an Automated Valuation Model. It’s a useful starting point, but it isn’t the same as what your home would sell for — and it helps to know why.

What an online estimate actually is

An Automated Valuation Model, or AVM, estimates the value of a property at a specified date using mathematical modelling, drawing on public-record data and computer decision logic to produce a calculated estimate of a probable value ¹. Most AVMs combine more than one method — commonly a hedonic model and a repeat-transaction index — and comparables-based versions select similar properties for each estimate, then weight each model’s result by a confidence score to report a single figure as of a specified date ². One limitation is built in: because no physical inspection takes place, an AVM assumes average condition, which may not reflect the home in front of you ³.

What an appraisal adds

A professional appraisal works differently. Members of the Appraisal Institute of Canada — such as the AACI and CRA designations — base an opinion of market value on comprehensive research and analysis together with a physical inspection, observing the dwelling’s components and characteristics, its finishes and systems, rather than assuming them ⁴. That inspection is the piece an algorithm can’t supply.

Why your MPAC assessment isn’t your market value

It’s easy to confuse the number on your property-tax notice with what your home is worth. MPAC, the Municipal Property Assessment Corporation, draws the distinction plainly: a sale price is the final figure two parties negotiate and agree on, while an assessed current value is an informed opinion of worth based on analysis of sales transactions in a given market area ⁵. MPAC values Ontario residential property using Current Value Assessment, and for the 2025 property-tax year those assessments continue to rest on a legislated valuation date of January 1, 2016 — so the figure on your notice reflects a 2016 point in time rather than today’s market ⁶.

When MPAC assesses a home it considers some 200 factors, but a small set of five accounts for the large majority of the value: location, lot dimensions, living area, age of the property (adjusted for major renovations or additions), and quality of construction ⁷.

Where a REALTOR fits in

Real estate in Ontario is regulated by the Real Estate Council of Ontario (RECO). The Trust in Real Estate Services Act (TRESA) came into effect on December 1, 2023, replacing the former REBBA, and under TRESA registrants must provide and explain the RECO Information Guide to clients and self-represented parties ⁸. A REALTOR’s read on price draws on the Multiple Listing Service — TRREB operates a full-range MLS available to REALTORS, while REALTOR.ca is described by CREA as the portal that combines MLS System feeds from every real estate board and association in the country ⁹ — alongside the local, on-the-ground detail no model captures.

None of these — an AVM, an assessment, an appraisal or an agent’s opinion — is the single “right” number; each answers a slightly different question. If you’d like a considered, no-pressure read on your own home, that’s a conversation Suba is glad to have.

How we write these guides: every fact is checked against the published sources listed below. We don’t publish forecasts or “good time to buy/sell” calls, and we don’t put a dollar figure on your home sight unseen — that’s what a proper valuation conversation is for.

This article is general information, not real-estate, legal, financial or tax advice, and not an offer of representation or a solicitation of anyone currently under contract with another brokerage. Details such as transit lines, schedules, school catchments, hospital services and home valuations change over time — verify current specifics with the official source before relying on them. Suba Aynkharan, Sales Representative, RE/MAX Community Realty Inc., Brokerage.