Working with Gateway Group and the team there was fantastic for me as an investor. They helped me understand market conditions, and helped us create a legal duplex I feel really good about.

Residential Renovations & Additions
When your home needs more space or a fresh look, Gateway helps you transform it with smart design, durable construction, and a seamless process.
Whether it’s a kitchen remodel, a rear addition, a multi-generational or rental suite, or a complete redesign, clear communication, and dependable construction, so you can feel confident from start to finish. And for homeowners looking to take their property even further, we also explore creative ways to unlock new possibilities.
Ready to start your project? Let’s explore how we can transform your space and build opportunities together
Permits + code compliance
Design-build
Hamilton experience + timelines
Your Gateway team delivers more than a fresh space — we deliver a home that enhances how you live today and adds value for years to come.
If you’re looking to turn your Hamilton basement or existing space into a self-contained, legal suite, Gateway can help you design and build it the right way. From zoning and permits to fire separation and soundproofing, we create second suites that work for multi-generational families today and future tenants tomorrow.
Legal, code-compliant layouts for basement and second suites
Smart designs that balance privacy, comfort and safety
Ideal for mortgage helpers, in-law suites or adult children
Upfront guidance on costs, rents and estimated payback period ← new
Full support with permits, inspections and approvals
* We’ll review your property and get back to you within 1 business day
Thinking Bigger? Multi-Unit Conversions
Beyond traditional renovations, Gateway also specializes in multi-unit conversions — transforming single-family homes into duplexes, triplexes, or fourplexes.
Conversions offer:
Whether you’re a homeowner or an investor, a multi-unit conversion can help you make the most of your property and unlock new opportunities.
See What’s Possible
We’ve helped homeowners across Hamilton and Southern Ontario reimagine their spaces, from small updates to major transformations. Explore our gallery and client stories to see how thoughtful renovations, additions, and conversions can bring your vision to life.
Greg Borys
Working with Gateway Group and the team there was fantastic for me as an investor. They helped me understand market conditions, and helped us create a legal duplex I feel really good about.
Gateway Group were the building contractors on the newly renovated house we bought at the end of 2021. The team used premium materials throughout and every maintenance or contract team that has been through our home since we purchased it have commented on the high quality of the renovation and finishings.
My family and I are so happy to work with the Gateway team and also be surprised of buying this house that it was built by you so everything look good to me. It is nice house, good quality especially good price.
My wife and I bought our first home built by Charles and the Gateway team and absolutely love it. The whole process has been great, Charles and the team are very responsive and care about the quality of work and the product they built. We love our home and are so happy to make memories here.
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