

Expert design build solutions for legal triplexes and basement suites in Toronto.
We transform underperforming Toronto homes into high-yield multi-unit investments. By creating legal secondary suites or triplexes, we help you generate significant monthly rental income that can often cover your entire mortgage while increasing the property's overall market valuation by hundreds of thousands.
Navigating the City of Toronto’s 'Bill 23' and multiplex regulations is daunting for most owners. We handle the entire process, including architectural CAD drawings, structural engineering, and securing building permits, ensuring your unit is fully legal, insurable, and compliant with Ontario Fire Code standards.
We utilize specialized acoustic insulation and resilient channel mounting to virtually eliminate sound transfer between units. This attention to detail results in higher tenant satisfaction, reduced complaints, and longer-term leases, which are essential for a successful multi-unit rental operation in an urban environment like Toronto.
We begin by reviewing your Toronto property's specific zoning sub-type and lot dimensions to confirm how many units can be legally added. We check for heritage restrictions, tree protection zones, and parking requirements to ensure the project is viable before you spend a dollar on design. This step prevents the common pitfall of designing a space that the city will ultimately reject.
Our designers create detailed floor plans that prioritize tenant privacy and flow while maximizing every square inch of the footprint. We submit these plans to the City of Toronto for building and plumbing permits, handling all inspector inquiries on your behalf. This is where we finalize fire separation details and egress paths required by the Ontario Building Code.
Most Toronto multi-unit conversions require upgrading the electrical panel to 200 or 400 amps and installing fire-rated HVAC ductwork. We also handle structural changes, such as creating new separate entrances or enlarging window openings for basement light. This ensures the backbone of your building is safe, modern, and capable of supporting multiple households.
The final stage involves installing durable, high-traffic finishes like luxury vinyl plank, quartz counters, and modern cabinetry that attract premium tenants. We coordinate the final inspections with the City of Toronto to receive your occupancy permit, officially making your units legal. This closeout process is vital for ensuring your property insurance reflects the new multi-unit status.
According to the Ontario Building Code and Toronto bylaws, a legal secondary suite generally requires a minimum ceiling height of 6 feet and 11 inches (2100mm) over at least 75% of the required floor area. If your basement is currently lower, we can perform a 'bench-footing' or 'underpinning' to lower the floor and gain the necessary height. We will assess your foundation and plumbing during our initial consultation to determine the most cost-effective way to achieve these standards.
Costs for a multi-unit conversion in Toronto vary wildly based on the existing condition of the home and the level of finishes. Generally, you can expect investments to range from $150,000 for a simple basement conversion to over $400,000 for a full triplex optimization including structural changes. Factors like electrical service upgrades, fire separation installation, and separate HVAC systems contribute to the cost, but these are essential for legal compliance and maximizing your property's long-term resale value.
Yes, as of 2022, most residential properties in Toronto are eligible for garden suites, provided they meet specific criteria regarding lot size and access. Built By Pros Inc. specializes in these detached accessory dwelling units, managing everything from the foundation and water connection to the final interior finishes. We help you navigate the 'As-of-Right' zoning rules to ensure your garden suite is built legally without needing a lengthy trip to the Committee of Adjustment whenever possible.
To maximize your ROI, we strongly recommend separating utilities. We typically coordinate with Toronto Hydro to install multiple meters, allowing tenants to have their own accounts for electricity. For water and gas, if separate metering is too costly, we often install energy-efficient sub-metering systems. This eliminates the 'all-inclusive' rent model, protecting you as the landlord from fluctuating utility costs and encouraging tenants to be more mindful of their energy consumption.
Transform your property into a high-value asset by navigating Toronto's specific legal requirements for basement apartments and garden suites. This comprehensive guide from Built by Pros Inc. breaks down the zoning, permits, and construction standards needed to build a compliant and profitable secondary dwelling.
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Learn MoreRicardo and his team converted my old bungalow in North York into a legal duplex with a stunning basement suite. They managed the entire permit process with the City of Toronto, which saved me countless headaches. The quality of the soundproofing between the floors is incredible—I can barely hear the tenants downstairs! The project was completed in 16 weeks, right on schedule, and the custom kitchen they designed for the small space actually helped me rent the unit for $400 more than I originally expected.
I hired Built By Pros to optimize my semi-detached home in East York into three separate units. Suzanne's eye for design was invaluable; she found a way to add a second bathroom to the main unit that I didn't think was possible. They used high-end materials like quartz countertops and durable vinyl plank that looks like real hardwood. The construction crew was respectful of my neighbors and kept the site clean every day. It's been a year, and my property value has skyrocketed thanks to their expert work.
Converting our detached garage into a legal garden suite in Toronto was a complex project with lots of red tape. Built By Pros handled it with ease. From the initial 200-amp electrical upgrade to the final finishing touches on the walnut cabinetry, their craftsmanship was top-notch. They even installed a backwater valve and upgraded our main water line to ensure everything was up to current codes. I highly recommend them for anyone looking to maximize their property's potential.

Ricardo Lora

Suzanne Morgan

Petra Tobias

Stronger Together

Bastian Zuniga

Marco Lopez
Contact us for unmatched expertise in home renovations. With experience since 2008, we deliver top-quality materials and superior workmanship—trusted by clients and built on referrals.