

Expand your footprint with seamless structural additions designed for modern Markham lifestyles.
We handle the entire Markham building permit process, including Committee of Adjustment applications for minor variances. Our team manages the technical CAD drawings and engineering stamps required by York Region, ensuring your addition is fully legal and compliant. This eliminates the stress of bureaucratic delays and protects your property's resale value.
Our additions are engineered for Markham’s specific climate, using high-efficiency spray foam and rigid board insulation to exceed Ontario Building Code standards. We ensure your new living or working space remains warm during winter freezes and cool during York Region's humid summers. Proper thermal breaks and high-performance windows are standard in all our structural expansions.
Matching a new foundation to an existing one requires technical precision to prevent future settling or water damage. We use specialized footings and advanced waterproofing membranes specifically selected for Markham's soil types. This ensures a stable, moisture-free transition between your original home and your new maximized space.
We start by analyzing your Markham property survey against local bylaws to determine exactly what size and height of addition is permitted. This prevents wasted design fees on plans that the city will eventually reject. We identify potential issues with setbacks or lot coverage early on to ensure a smooth path forward.
Our designers create detailed blueprints that focus on maximizing your layout's efficiency while ensuring the new addition blends architecturally with your existing home. We use 3D modeling so you can see how light and traffic will flow through the expanded space. Once you approve the design, we finalize the engineering stamps for permit submission.
During this critical phase, we carefully excavate and connect the new foundation and framing to your original structure. We use heavy-duty flashing and structural headers to ensure a rock-solid connection that prevents leaks or shifting. This is where our 15 years of experience in Markham really ensures the longevity of your addition.
The final step involves seamless integration of your HVAC, electrical, and plumbing systems into the new space, followed by high-end interior finishing. We carry out rigorous quality checks on insulation and trim work to ensure the 'new' space feels like it's always been part of your home. We end with a thorough site cleanup and a final walkthrough to ensure complete satisfaction.
In Markham, structural additions typically range from $300 to $500 per square foot, depending on the complexity of the tie-in and the quality of finishes. Factors like second-story vs. ground-level expansion, HVAC integration, and soil conditions on your property will influence the final budget. We provide a detailed quote after reviewing your site and the specific zoning requirements of your Markham neighborhood.
The permitting timeline in Markham generally takes between 8 to 12 weeks for a standard residential addition. If your project requires a minor variance through the Committee of Adjustment, an additional 2 to 4 months may be added to the pre-construction phase. Built By Pros Inc. manages all the documentation and city interactions to expedite this process as much as possible.
In most cases, yes, you can remain in your home while we build. We use specialized dust-containment barriers and temporary walls to separate the living area from the construction zone, ensuring your safety and comfort. However, for large-scale second-story additions or major structural reworks, we may recommend a short relocation during the most intensive phases, like roof removal or major utility tie-ins.
Yes, adding significant square footage or a secondary suite can lead to an assessment update by MPAC, which may affect your property taxes. However, the increase in tax is usually minimal compared to the significant boost in the market value and functional utility of your home. We can provide you with information on how additions typically impact values in your specific part of Markham.
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.
Complete home or commercial rebuilds to give you a new structure, keeping only what can be re-purposed to save cost and the environment.
Learn MoreUpgrade existing spaces with quality craftsmanship to better meet the needs of your family.
Learn MoreWhether at your home or business, we provide zoning and permitting services as part of our planning process.
Learn MoreFull-service construction for commercial projects. Let our in house design team elevate your brand with custom space design.
Learn MoreCustom solutions to maximize the return on your property investment.
Learn MoreWe have the ADA design training in house to ensure your home is ready for your golden years , even when your are not.
Learn MoreWe hired Built By Pros Inc. to add a 600-square-foot second-story addition to our bungalow in Markham Village. Ricardo and his crew were meticulous, finishing the project in just under five months despite a very rainy spring. They used high-quality cedar siding that matched our existing exterior perfectly. The communication from Suzanne regarding the design phase was exceptional, and they managed the complex Markham zoning permits without any issues.
Our need for a dedicated home office led us to Built By Pros for a side-yard addition. They created a beautiful, sun-filled workspace with integrated data cabling and custom built-in shelving. The transition between our old dining room and the new office is so seamless you can't tell it wasn't part of the original build. They were very respectful of our neighbors in Unionville, keeping the site clean and the noise within permitted hours.
We needed to maximize our space to accommodate an aging parent, so we opted for a secondary suite addition. Ricardo’s team built a stunning 450-square-foot ground-level extension with an accessible bathroom and separate entrance. They used premium quartz countertops and luxury vinyl plank flooring that looks amazing. Given the tight lot lines in Cornell, their precision in staying within the setbacks was impressive, and the project was completed on budget.

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.