A duplex or triplex can be a great way to build long-term wealth through real estate. But finding the right property involves more than looking at the purchase price, counting the units, and adding up the rent.
What matters is what you're actually buying, what it costs to operate, and whether the numbers make sense for your investment strategy.
I'm Jeremy McGraw, a Windsor-Essex Realtor and real estate investor. I've been helping clients buy and sell real estate since 2016, and I've spent years building and managing my own investment portfolio.
I've purchased properties, managed renovations, dealt with tenants, worked through financing and refinancing, and experienced firsthand the expenses that don't always make it into a listing description.
When I look at a duplex or triplex, I'm not just looking at what it's worth today. I'm looking at how it operates, what improvements it may need, what risks come with it, and how it fits into the bigger picture.
That's the perspective I bring to my investor clients.
By Jeremy McGraw, Sales Representative, RE/MAX Capital Diamond Realty Brokerage. Updated November 1, 2026.
Why Invest in a Duplex or Triplex in Windsor?
Duplexes and triplexes appeal to a wide range of buyers, from first-time investors looking for their first rental property to experienced landlords expanding their portfolios.
There are several reasons investors consider these properties.
- Multiple rental income streams. Rather than relying on rent from a single unit, duplexes and triplexes can generate income from two or three separate households. That doesn't eliminate vacancy risk, but it can reduce your dependence on one tenant.
- Long-term equity growth. As your mortgage is paid down and the property potentially appreciates, you can build equity over time. Appreciation isn't guaranteed, which is why the property's income and operating costs matter.
- Value-add opportunities. Some properties may benefit from renovations, improved layouts, operational efficiencies, or bringing vacant units up to market standards. The key is understanding the cost of those improvements and whether the additional income justifies the investment.
- Flexible ownership strategies. Some buyers purchase a duplex to live in one unit and rent the other. Others pursue long-term buy-and-hold investments, renovations, or portfolio expansion.
Not every duplex or triplex is a good investment. The right property depends on the purchase price, financing, condition, existing tenancies, and your individual objectives.
What I Look at Before Buying a Duplex or Triplex
Two properties can have the same asking price and similar rental income but produce completely different financial results.
That's why I prefer to work backward from the numbers rather than get caught up in the listing.
1. Actual Rental Income vs. Potential Rental Income
There's a difference between what a property currently collects and what someone believes it could rent for.
I want to know:
- What is each unit currently renting for?
- Are the tenants paying their own utilities?
- Are any units vacant?
- How long have the existing tenants lived there?
- What are comparable units actually renting for?
- Are projected rents realistic and legally achievable?
A property advertised with $5,000 in potential monthly income isn't necessarily collecting $5,000 today.
If the property is fully occupied at $3,500 per month, that's the income we need to understand first. Any future increase must be evaluated separately, taking into account tenant rights, turnover, renovation costs, and applicable Ontario rental laws.
I don't underwrite an investment based on income that hasn't materialized yet.
2. Operating Expenses and Cash Flow
Gross rental income only tells part of the story.
Property taxes, insurance, utilities, maintenance, vacancy allowances, and capital expenditures all affect what an investment actually produces.
I also look at how the property is set up.
Are the utilities separately metered? Who pays for water? Is there one furnace serving the entire building? How old is the roof? Are there major mechanical systems nearing replacement?
These details can make a meaningful difference to your bottom line.
And if you're financing the property, we need to understand what the mortgage payments will do to the monthly cash flow.
A property generating $4,000 in rent isn't automatically a better investment than one generating $3,500.
It's what remains after the expenses that matters.
3. Property Condition and Renovation Costs
Having completed renovations on my own investment properties, I know how quickly a renovation budget can change once work begins.
Cosmetic improvements are one thing. Electrical upgrades, plumbing, structural issues, roofing, heating systems, and moisture problems are another.
I pay particular attention to older properties where deferred maintenance may have accumulated over several ownership cycles.
That doesn't mean avoiding properties that need work.
Sometimes those are where opportunities exist.
But a $40,000 renovation needs to be treated as $40,000 of additional investment, with appropriate allowances for contingencies, carrying costs, and possible delays.
The question isn't just whether a property can be improved. It's whether the improvement makes financial sense.
4. Existing Tenants and Lease Agreements
Buying a fully occupied triplex is different from purchasing a vacant building.
Existing tenants can provide immediate income and reduce initial leasing work, but the lease agreements, rent history, payment records, and legal obligations all matter.
In Ontario, a property changing ownership does not automatically end existing residential tenancies.
Before proceeding, I want my clients to understand the current tenancy situation, the financial implications, and any concerns requiring review by an Ontario real estate lawyer or other qualified professional.
Assuming a unit will become vacant simply because the property is being sold can create serious problems for an investor.
5. Financing and Long-Term Strategy
The financing needs to support the investment strategy.
Are you planning to hold the property for the next 10 or 20 years? Renovate and refinance? Purchase additional properties? Live in one of the units?
Each approach can change how we evaluate the purchase.
I look at the property through the lens of the overall investment rather than treating each purchase as an isolated transaction.
A property that looks attractive today may create challenges later if the financing, capital requirements, or cash flow restrict your next investment.
Understanding Windsor's Duplex and Triplex Market
Windsor has a variety of housing types, from older homes converted into multiple units to purpose-built duplexes and small multifamily properties.
Areas such as Ford City, Walkerville, Downtown Windsor, and Sandwich Town can present different opportunities depending on the building, location, condition, rental market, and intended strategy.
However, it's important not to assume that two properties in the same neighbourhood have similar investment potential.
Street-level differences matter. So do property condition, tenant profiles, parking, access, utility arrangements, and the quality of existing renovations.
I also pay attention to how a property is legally configured.
Just because a building is advertised as having two or three units doesn't automatically mean every unit has been legally established or complies with applicable requirements.
Zoning, building permits, fire separation, means of egress, and other building requirements may need to be investigated before purchasing.
My approach is to understand the individual property first, rather than assuming an entire neighbourhood is a good or bad investment.
Buying a Duplex vs. a Triplex: Which Makes More Sense?
There's no universal winner.
A duplex may be a more manageable entry point for an investor purchasing their first income property. With two units, the building may be simpler to operate, depending on its age, layout, and condition.
A triplex offers an additional income-producing unit, which may improve total revenue and help spread certain operating costs across more tenants.
But it may also require more capital, involve additional maintenance, or present different financing considerations.
For me, the decision comes back to the numbers.
I'd rather see a client purchase a well-performing duplex than stretch their finances to acquire a triplex that doesn't support their goals.
More units don't automatically mean a better investment.
Can You Convert a Duplex Into a Triplex in Windsor?
This is something investors should investigate carefully.
The City of Windsor permits additional dwelling units in certain residential properties, subject to zoning, building permit requirements, and other applicable conditions.
That can create opportunities to increase housing density or improve a property's income potential.
However, the ability to add another unit depends on the specific building and property.
Ceiling heights, fire separation, entrances, plumbing, electrical capacity, parking requirements, floodplain restrictions, and construction costs can all affect feasibility.
A potential third unit should never be treated as guaranteed income until the necessary approvals and practical requirements have been established.
Before making a purchase based on a proposed conversion, I recommend verifying the requirements with the municipality and qualified building professionals.
Why Work With an Investor-Focused Windsor Realtor?
There's a difference between understanding how to sell a house and understanding how to evaluate an income-producing property.
Both require real estate knowledge, but investment properties add another layer of financial and operational considerations.
I've experienced both sides.
As a Realtor, I understand the transaction, comparable sales, negotiations, and due diligence process.
As an investor, I understand what happens after the keys change hands.
I've dealt with renovation budgets, contractors, rental income, operating expenses, tenants, appraisals, and refinancing. I understand the importance of keeping enough capital available for unexpected expenses and future opportunities.
I've also learned that sometimes the best investment decision is walking away from a property.
My role isn't to convince you that every duplex or triplex is a good deal. It's to help you understand what you're buying and make a decision supported by the numbers.
Selling a Duplex or Triplex in Windsor
If you already own an investment property and are considering selling, your approach should reflect the type of buyer you're trying to attract.
Investors want to understand income, expenses, existing tenancies, and the property's overall condition.
A properly prepared investment-property listing should make that information accessible and credible.
Depending on the property, that can include reviewing rental income, operating expenses, lease information, improvements, and potential value-add opportunities.
Presentation matters, but so does accurate financial information.
I also understand that selling a tenanted property requires consideration for the people living there, appropriate showing arrangements, and compliance with Ontario tenancy requirements.
The objective is to position the property effectively while making the transaction as straightforward as possible for everyone involved.
Frequently Asked Questions About Duplexes and Triplexes in Windsor
Is a duplex a good investment in Windsor, Ontario?
A duplex can be a good investment when the purchase price, rental income, expenses, condition, and financing support your financial goals. Some properties offer stronger cash flow, while others may be more focused on long-term appreciation or renovation potential. Each property needs to be evaluated individually.
How much down payment do I need for a duplex or triplex?
Down payment requirements depend on several factors, including whether you intend to occupy a unit, the number of units, the financing program, and your financial qualifications. Owner-occupied and non-owner-occupied investment properties may have different lending requirements. A mortgage professional can confirm the options available for your situation.
Can I buy a duplex or triplex with tenants already living there?
Yes. Many investment properties are sold with existing tenants. Buyers need to review leases, rental income, and tenancy obligations before completing the purchase. Ontario's Residential Tenancies Act provides protections for tenants, and a sale does not automatically terminate their tenancy.
What is the difference between a legal duplex and an illegal duplex?
The distinction generally relates to whether the property's use and dwelling units have been lawfully established and comply with applicable municipal and building requirements. A property described as a duplex in a listing should not be assumed to have all required approvals. Buyers should verify the property's status with the appropriate authorities.
Should I buy a vacant duplex or one with existing tenants?
Both have advantages and disadvantages. An occupied property may provide rental income immediately, while a vacant property may offer more flexibility for renovations or establishing new tenancies. The better choice depends on your investment strategy, carrying costs, existing rents, and the property's condition.
Can a duplex be converted into a triplex?
Potentially. Windsor permits additional dwelling units in certain circumstances, but zoning, building requirements, physical limitations, and municipal approvals must be reviewed. Conversion potential should be verified before relying on additional rental income in your financial projections.
Let's Find an Investment That Makes Sense
Whether you're buying your first duplex, expanding into triplexes, or selling an existing rental property, I believe good investment decisions start with a clear understanding of the numbers.
I'm Jeremy McGraw, a Windsor-Essex Realtor and active real estate investor.
I work with clients who want more than a list of available properties. They want to understand the opportunity, the risks, and how a purchase fits into their long-term plans.
Looking at a duplex or triplex in Windsor? Let's review the property, evaluate the numbers, and determine whether it fits your investment goals.

About the author. Jeremy McGraw has been a Realtor in Windsor-Essex since 2016 and a real estate investor just as long. He has bought, renovated, rented and refinanced investment properties of his own, and works as part of SJ Real Estate at RE/MAX Capital Diamond Realty Brokerage.
Sales Representative, RE/MAX Capital Diamond Realty Brokerage
McGraw Real Estate · Windsor-Essex
519-982-8284 · jeremy@remax519.com
