Buying an Etobicoke Home with a Legal Second Suite: The Rules and the Math

Investor Dave Dubbin September 9, 2026

A legal second suite in an Etobicoke house is worth real money, but not as much as sellers usually ask for it, and the word legal is doing a lot of work in that sentence. Before you pay a premium for a home with a basement apartment, you need to know whether the suite is actually permitted, whether it meets the building code, and what the rent will genuinely net you after the costs nobody puts in the listing.

Looking at Etobicoke homes with income potential? Browse current listings and we will help you check the suites that are real against the ones that are just finished basements.

What Toronto actually allows

Since May 2023, fourplexes have been permitted as-of-right on most residential lots across Toronto, which came out of the City's Multiplex Study and amendments to Zoning By-law 569-2013. As-of-right means you do not need a rezoning or a trip to the Committee of Adjustment, provided the project fits the ordinary setback, coverage and height rules.

One Etobicoke-specific point that gets missed: the sixplex permissions that have been in the news apply to the Toronto and East York district and to Ward 23, not to our area. In Etobicoke the as-of-right ceiling in the main building is four units. If somebody is pitching you a six-unit conversion here, they are describing an application, not a permission.

A basement second suite is usually the simplest version of this, and it still needs a building permit. Under the Ontario Building Code a secondary suite has to meet a minimum ceiling height of 1.95 metres, proper fire separation between units, compliant egress windows, and interconnected smoke alarms. Verify anything specific to a property with Toronto Building before you rely on it.

The three kinds of basement apartment you will see

What the listing says	What it often means	What to ask for
Legal second suite	Permitted, permitted work, inspected and closed out.	The building permit number and the final inspection record.
Separate entrance, in-law suite, nanny suite	Usually a finished basement with a kitchen and no permit history.	Assume unpermitted until proven otherwise. Price the cost to legalize.
Currently tenanted at $X per month	Income exists. Legality and the lease terms are separate questions.	The lease, the rent history, and whether you can take vacant possession.

The math, worked

Here is the calculation we run for clients, using illustrative figures. Replace every line with real quotes for the specific house before you decide anything.

Line	Illustrative annual
Gross rent, one-bedroom lower suite at $1,800 per month	$21,600
Less vacancy and turnover allowance, 4%	-$864
Less incremental utilities, insurance and maintenance	-$3,000
Net operating income	$17,736
Return on an $85,000 cost to build the suite legally	20.9%

Illustrative only. Rent, build cost and operating costs vary by property. For context, TRREB's Q1 2026 rental report put the average GTA condo one-bedroom at $2,246 per month; a below-grade suite typically rents under that.

That last line is a return on cost, which is the same idea as a cap rate: the annual income the asset throws off, divided by what you paid to create it. A number in the high teens looks excellent next to almost anything else you can do with $85,000. What it hides is that you are also becoming a landlord, and the time and hassle do not appear on the spreadsheet.

If you are thinking about adding units rather than buying them:

What the suite does to your mortgage

Most lenders will count part of the rental income toward the ratios they use to qualify you, commonly somewhere between half and most of it, depending on the lender and the program. That can materially change what you can buy. It also means the suite has to be documented in a way the lender accepts, which is another reason the permit history matters.

One rule worth knowing before you set a rent: in Ontario, units first occupied after November 15, 2018 are exempt from the annual rent increase guideline. For reference, the guideline is 2.1 per cent for 2026 and 1.9 per cent for 2027. A brand new legal suite in an older Etobicoke house generally falls on the exempt side of that line, which is a meaningful long-term difference. All the other protections in the Residential Tenancies Act still apply.

The counterpoint

Two arguments against. First, you are buying a smaller house. A 1,900 square foot bungalow with a legal suite gives you about 1,100 square feet to live in, and families outgrow that faster than they expect. The premium you pay for the income is real money spent on space you do not get to use.

Second, an unpermitted suite is not a discount, it is a liability. If the City receives a complaint, you may be ordered to bring it up to code or remove it, and you cannot evict a tenant simply because the unit turned out to be non-compliant. Budget the legalization cost as if you will have to spend it, because the day you sell, the next buyer's lawyer will ask the same questions you should be asking now.

We look at a lot of these. Send us the listing and we will tell you whether the income story holds up before you write an offer.

Dave Dubbin
Etobicoke Real Estate Expert
Dave Dubbin & Associates
Real Estate Broker for Etobicoke and Toronto
Sotheby's International Realty, Canada