

Expert design build solutions for profitable multi unit conversions and residential density upgrades.


We handle the complexities of Richmond Hill's new zoning by-laws and O. Reg. 39/22, ensuring your multi-unit project is fully legal. This prevents costly work-stop orders and ensures your property is appraised at its true multi-unit value.
Our layouts are specifically engineered to maximize rental income per square foot while maintaining high tenant desirability. We focus on premium finishes and space-saving innovations that attract long-term, stable residents in the York Region.
Every unit we build exceeds Ontario Building Code requirements for fire separation and acoustic insulation. This creates a safer environment for tenants and provides peace of mind for landlords regarding liability and long-term maintenance.
We perform a deep dive into the Richmond Hill zoning by-law specifically for your property to determine its maximum density potential. This step prevents you from investing in a design that the city would ultimately reject. We identify any conservation or tree protection hurdles early in the process.
Our design team creates 3D models and detailed CAD drawings centered on maximizing floor area and resident privacy. We focus on optimizing utility placement to minimize the cost of running new plumbing and electrical lines. You will see a virtual walkthrough of the proposed units before we apply for any permits.
Built By Pros handles all interactions with the Richmond Hill building department, including structural engineering sign-offs and HVAC design calculations. We manage the paperwork loop so you don't have to navigate the municipal bureaucracy yourself. This ensures every wall moved is legally documented and safe.
Our specialized crews execute the build with a focus on fire-rating and sound-dampening between units. We use moisture-resistant materials suitable for the Richmond Hill climate to ensure long-term durability. Regular site supervision ensures that every trade—from electricians to drywallers—meets our 'Pro' standard of excellence.
Under the current Richmond Hill regulatory framework, most residential lots can accommodate up to three dwelling units. This typically includes the principal residence plus two additional units, such as a legal basement suite and a detached accessory dwelling unit (garden suite), provided all setbacks and lot coverage requirements are met.
The timeline for permits in Richmond Hill usually ranges from 8 to 16 weeks depending on the complexity of the project. If your project requires a minor variance through the Committee of Adjustment, the process can take longer. Our team handles all CAD drawings and municipal applications to make this process as efficient as possible.
Yes, converting an existing garage or building a new coach house is often possible under current accessory residential unit (ARU) guidelines. However, you must maintain minimum parking requirements for the principal residence and ensure the structure meets fire safety and insulation standards. We would conduct a site visit to assess your specific garage's structural integrity before proceeding.
In Richmond Hill, the Ontario Building Code generally requires a minimum ceiling height of 6 feet 11 inches for at least 75% of the required floor area in a basement suite. If your basement is currently lower, we may need to discuss underpinning or 'benching' the foundation to achieve the necessary height for legal occupancy.
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Learn MoreWe hired Built By Pros to convert our large Richmond Hill detached home into a legal triplex. Suzanne managed the design phase flawlessly, navigating the new zoning rules that I would have never understood on my own. Ricardo's crew was on-site every morning by 7 AM and finished the entire conversion in just under 6 months. The attention to detail in the soundproofing between the main and lower units is incredible; I can barely hear a footstep from the tenants below.
After seeing their work at a home show, we chose Built By Pros for our garden suite addition in Richmond Hill. The unique challenge was the protected tree in our backyard, but their site supervisor Bastian worked closely with the city arborist to ensure we didn't damage the root system. The modern brick and dark siding they chose match our original house perfectly. It took 22 weeks from the first shovel to the final walkthrough, and the result is a beautiful, profitable unit.
Transforming my Richmond Hill basement into a legal rental unit was the best decision I've made. Built By Pros handled all the plumbing upgrades and electrical panel splits so that each unit now has its own billing. They even managed the egress window installation through my thick foundation walls with zero issues. The project cost was exactly what they quoted in the itemized contract, and the quality of the laminate flooring and trim work is top-tier.

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.