Custom Additions Built to Elevate Your Home

A custom home addition is one of the most impactful ways to expand your living space and increase the value of your property. Whether you’re welcoming a growing family, creating a dedicated home office, adding a primary suite, or simply looking for more functional square footage, a thoughtfully designed addition can transform the way you live in your home. Homeowners across the Niagara Region—including St. Catharines, Niagara-on-the-Lake, Niagara Falls, and surrounding communities—turn to Mitchell Contracting for additions that blend seamlessly with the existing structure while elevating comfort, style, and long-term usability.

With Mitchell Contracting, every addition begins with a clear understanding of your goals, lifestyle, and the unique characteristics of your home. Our team works closely with homeowners, designers, and architectural partners to plan and build an addition that feels original to the home while meeting today’s functional demands. From modernizing layouts to improving natural light and flow, each project is crafted with precision and attention to detail.

A well-executed home addition doesn’t just add space—it enhances the overall experience of living in your home. With our craftsmanship, reliable project management, and over 15 years of renovation and building expertise, you can trust that your addition will deliver lasting value, improved functionality, and a beautifully cohesive result that your family will enjoy for years to come.

our work in action

view our latest custom addition projects

Additions

Niagara Falls Main Floor Dining & Office Addition

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Additions

Niagara-on-the-lake Second Storey Addition

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Additions

Niagara Falls Sunroom Addition

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Additions

St. Catharines Main Floor Addition

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Additions

St. Catharines Second Storey Addition

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We understand that your home is a part of your family and when it comes to renovations, who you hire means everything. With over 15 years of experience and a 2-year workmanship guarantee, our work isn’t just beautiful, it’s built to last. We deliver every renovation and alteration in a timely manner, complemented by our modern style and timeless finishes. At Mitchell Contracting, we love what we do. Let us bring your next home renovation project to life.

See what our customers are saying

We first met Brendan Mitchell when we went out to tender a total home remodel of our cherished 200 year old home in Old Town Niagara on the Lake...Brendan stood out from the other contractors almost immediately. When we met he took the time to inspect the house in depth and address any questions we had. Brendan’s interest and attention to detail was notable. We could tell he was sincere and had a real passion for his profession...Brendan was incredible to work with...We worked with Brendan and his team everyday over a 10 month period and never had any negative issues which is really saying something given the complexity of our project. He is a super talent. We highly recommend Mitchell Contracting.

We recently had our basement renovated, and we couldn't be happier with the results! Brendan Mitchell and his team were professional, detail-oriented, and incredibly skilled. They transformed our basement into a beautiful, functional living space that exceeded our expectations. The egress window installation was seamless. Mitchell Contracting ensured everything was up to code and provided thoughtful recommendations throughout the project. From start to finish, communication was excellent. We highly recommend Mitchell Contracting for anyone looking for high-quality work and a stress-free renovation experience. Thank you for your hard work and dedication!

We hired Mitchell Contracting for an addition to our home, and to renovate an existing bathroom. Brendan was fantastic from start to finish. We had to change plans and he walked us through everything thoroughly and took care of all the city permitting (which was a huge bonus!). His quote and timelines were accurate and detailed. A big renovation can be stressful and his team did everything they could to make it as easy as possible for us. Once construction began his team was always professional, detail oriented, and left the workspace immaculate. Brendan and his team were able to turn our starter home into our forever home and we are so grateful and lucky! We will absolutely use them for any future renovations, and I highly recommend his services.

In March of 2020, we had a 1600 sq ft high, dry, and empty basement that we wanted transformed into a family gathering space, complete with kitchen, bath, and 2 bedrooms. Brendan started out with a blank page, and since we already had our design plan, he literally brought our plans to life! From the flooring to the tile to the custom cabinetry, to the specific drywall finishes we wanted.... the Mitchell Contracting team exceeded our expectations, which is pretty difficult, as we are particular.. The team was on time, clean, and communicate very well through each step. We highly recommend Mitchell Contracting to everyone we know. You will not be disappointed.

We recently completed a full remodel of our kitchen and a refresh of our basement with Mitchell Contracting. Not only did they meet our expectations they went above and beyond to exceed them. From the start of our design process through construction and follow-up, Mitchell Contracting demonstrated their professionalism, expertise, customer service and true passion for their business.

I hired Mitchell Contracting to renovate my bathroom, replace all of my windows and back door and I could not be happier with the results! Brendan is not only genuinely kind but is extremely knowledgeable about every aspect of his work. He was very quick with all communication and was happy to make any adjustments so that everything was just as I imagined. Ryan and Dale did the bulk of the work on my bathroom - their attention to detail speaks for itself when you look at the tile work they completed. I would recommend Brendan and his team without hesitation, thank you for everything!

Brendan Mitchell (Mitchell Contracting ) was so easy to work with and he made some great suggestions and recommendations for our kitchen. The guys on his team were very nice and easy to talk to and worked very hard with no delays. They did a great job on our kitchen and we would definitely hire them again. It was a really great experience!!

We recently had a 450 sq. ft. home addition completed by Mitchell Contracting and we couldn’t be happier with the results. The craftsmanship was exceptional — every detail was done with precision and care. The team kept the workspace remarkably clean throughout the entire project, which made a big difference for us since we lived here during the construction phase. Their communication was better than we ever expected — we were always kept in the loop and any questions we had were answered quickly and clearly. On top of all that, the pricing was very fair for the quality of work we received. Mitchell Contracting delivered a seamless, professional experience from start to finish. Highly recommend!