
Transform your East York property with custom rear extensions and second story additions.


We combine architectural design and construction management into one seamless process tailored for East York lot sizes. This ensures that your addition is aesthetically compatible with neighboring homes while meeting your modern space requirements. By managing both sides, we eliminate communication gaps between architects and builders.
Our team navigates the specific zoning variances required by the City of Toronto for East York additions. We handle all applications and represent you at hearings to secure the necessary height or lot coverage permissions. This service saves you months of stress and significantly increases the likelihood of project approval.
Every addition includes a comprehensive audit of your existing plumbing and electrical systems to ensure compliance with the latest Ontario Building Code. We upgrade legacy 60-amp services to 200-amp panels to support new appliances and HVAC loads. This proactive approach prevents future utility failures and ensures your family's safety.
We perform a detailed analysis of your East York property's survey and existing structure to determine what type of addition is legally and structurally possible. This step identifies potential set-back issues or foundation limitations early on. Understanding these constraints prevents costly redesigns and sets a realistic budget for your expansion.
Our architects create detailed CAD drawings that maximize your living space while adhering to the Ontario Building Code and local height restrictions. We manage the submission of all permit applications to the City of Toronto and represent you at any Committee of Adjustment meetings. This ensures all bureaucratic hurdles are cleared before construction begins.
During construction, we manage the reinforcement of your existing foundation and the framing of the new addition, ensuring seamless integration with the old structure. We also modernize your home’s electrical and plumbing systems to handle the increased load of the new rooms. This phase is critical for the long-term safety and efficiency of your expanded home.
Once the exterior is weather-tight, we focus on the interior finishes, including custom cabinetry, specialty lighting, and high-end flooring. We conduct a final walkthrough with you to ensure every detail meets our standards and your expectations. We then close out all permits and provide you with a comprehensive warranty package for total peace of mind.
A typical home addition in East York generally costs between $325 and $450 per square foot. Factors influencing this price include the complexity of the structural work, the quality of finishes chosen, and whether a Committee of Adjustment hearing is required. For example, a second-story addition usually costs more than a ground-level bump-out due to the structural reinforcements needed for the existing foundation and main floor walls.
The timeline varies based on approvals, but generally, you should plan for 5-7 months for design and standard permits. If your project requires a Committee of Adjustment variance for height or density, add another 3-5 months to the pre-construction phase. The actual construction phase typically lasts between 3 and 12 months depending on the size and scope of the addition, making the total project duration roughly one year.
Most significant additions in East York, like a second story or a large rear extension, exceed the standard zoning bylaws for floor space index (FSI) or height. If your plans deviate from these bylaws, you must apply to the Committee of Adjustment. Our team has a high success rate with these applications because we design additions that are sensitive to the local character and architectural standards of the neighborhood.
While it is possible for some rear additions, it is often difficult and uncomfortable for homeowners to remain during a major second-story addition due to the roof removal and utility disruptions. We prioritize dust mitigation and site safety, but many families find it easier to vacate for the duration of the heavy structural work. We provide a clear schedule so you can plan your temporary living arrangements according to the major construction milestones.
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Learn MoreBuilt By Pros Inc. completed a 400 square foot rear kitchen extension for our home in Leaside last winter. The team managed the Committee of Adjustment beautifully, getting our height variance approved in just one hearing. The quality of the custom wood island and the heated marble flooring in the new pantry is exquisite. They finished exactly on the 10-month timeline they quoted, despite some tricky weather in January. Truly professional workers who respected our neighbors throughout the build.
We hired Ricardo and his team for a second-story addition to our bungalow near Danforth Village. The project involved adding three new bedrooms and a master ensuite with a luxurious walk-in shower. They were exceptional at keeping the site clean and managing the tight alleyway access for deliveries. The engineering for the new floor was solid, and they integrated the new HVAC perfectly into our existing system. It’s rare to find a contractor in East York that communicates this clearly every week.
After researching several contractors, we chose Built By Pros for our home office addition in the Golden Triangle. Suzanne’s design for the arched niches and integrated shelving transformed our vision into a high-end reality. They handled the 1940s plumbing upgrades with ease, ensuring everything was up to code before finishing the interior. The project took about 8 months from permits to painting, and the final result has completely changed how we work from home. We couldn't be happier with the results.

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.