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Multi-Unit Development

Multi-Unit Conversions & New Builds in Hamilton

 

Duplex. Triplex. Fourplex. Multiplex. One team from feasibility through permits to final inspection — fixed price, no surprises, permits closed.

Charles Wah, Gateway Founder — Chair, City of Hamilton Missing Middle & Infill Housing Subcommittee. We build what the policy is designed to create.

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Certified. Registered. Trusted.

MULTI-UNIT

Multi-Unit Development Built for Hamilton Investors

Most contractors can quote a renovation. Very few can convert a property into a legal multi-unit building, and fewer still can close the permits, hit the price they quoted, and hand you a compliant, cashflow-ready asset on schedule.

That’s the difference between a renovator and a builder. Gateway is the latter. We’re not just renovators, we’re Tarion-registered builders who have been managing complex residential projects in Hamilton for over 12 years. We handle feasibility, design coordination, permits, and construction as one accountable team.

  • Feasibility-first planning — know what’s possible before you spend a dollar on design.
  • Full permit management — zoning checks, architectural coordination, City of Hamilton submissions. You never visit the building department.
  • Fixed-price contract — the number in your proposal is the number you pay. Your ROI calculation stays intact.
  • One team, full scope — plans through final inspection, no handoffs to trades you’ve never met.
  • Daily WhatsApp updates — every active build day, so you always know exactly where your project stands.
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From First Call to Final Inspection — Here’s How It Works

  1. Step 1 — Free Feasibility Assessment

    Zoning review, lot assessment, realistic unit count, and high-level cost range — before either side invests more time. You’ll know what your property can support and what it will take to get there.

    Step 2 — Design, Permits & Fixed-Price Proposal

    Architectural coordination, permit submissions with the City of Hamilton, and a fixed-price scope of work. What you see is what you pay — no allowances that balloon mid-build.

    Step 3 — Construction & Handover

    Full construction management through final inspection and city sign-off. WhatsApp update every active build day. Permits closed, units legal, asset ready.

Run ROI first

Get feasibility, ballpark cost & timeline

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Why Investors Choose Gateway

Contractors who can swing a hammer are everywhere in Hamilton. Builders who can close permits, hold their price, and deliver a legal multi-unit asset are rare. Here’s what makes Gateway different.

We interpret, advise and deliver on your goals

🏗️  Capability

We’re not just renovators, we’re builders. From legal basement suites to ground-up new homes, we handle the full scope.

🔁  Execution

One team from plans to permits to final build. No handoffs, no confusion, just one accountable team from start to finish.

✅  Experience

Clear pricing. Daily updates. No surprises. Fixed-price contracts and consistent communication, so you always know what’s happening.

Multi-unit projects succeed when you reduce unknowns early. We help you validate feasibility, plan the right unit mix, and move through approvals with fewer surprises.

Download our Design-Build Process Guide to see how we can bring your vision to life.

What Happens When You Reach Out

  1. . We review your property and goals

    Cory or Charles reviews your submission and follows up within 1 business day. We look at your address, zoning, and what you’re trying to achieve before we talk.

  2. You get a clear feasibility direction

    We tell you what’s realistic — unit count, rough cost range, known zoning considerations. No guesswork, no vague answers. You’ll know what you’re working with.

    1. If it’s a fit, we outline the path forward

    We walk you through the full process — design coordination, permit timeline, construction phasing, and a fixed-price proposal. You decide when you’re ready to move.

See below our most frequently asked questions regarding Dual Occupancy

We handle duplex conversions, triplex conversions, fourplex and multiplex conversions, legal basement suite additions to existing homes, infill new builds, and second-storey additions that add unit count. As a Tarion-registered builder, we manage the full scope — structural work, permits, trades, and final inspections. We do not focus on isolated cosmetic or single-trade jobs.

Permit timelines with the City of Hamilton typically run 2 to 4 months depending on zoning complexity, whether a minor variance is required, and the scope of engineering involved. We manage the full submission — architectural drawings, engineer sign-off, zoning review, and follow-up with the building department. You don’t chase approvals; we do.

Yes — completely. We conduct the zoning review, coordinate architectural plans, prepare and submit all building permit applications with the City of Hamilton, and manage all inspections through to final sign-off. Gateway’s founder, Charles Wah, chairs the City of Hamilton Missing Middle and Infill Housing Subcommittee — which means we have direct working knowledge of what Hamilton’s zoning changes mean for your specific property.

The planning phase covers: property and zoning feasibility, unit count options, concept design coordination, value-engineered specifications, costing, and a full project timeline. The output is a fixed-price proposal — a complete scope of work with a single number. No allowances. No estimates that change mid-build.

Timelines depend on scope. Duplex conversions typically run 3 to 5 months. Triplex and fourplex projects are generally 4 to 7 months. Larger multiplex or new build projects may run longer — we provide a full project schedule in your fixed-price proposal so you know exactly what to expect before construction starts. You’ll receive a WhatsApp update every active build day.

Submit the feasibility form with your address and goals. We check Hamilton zoning, lot size, setbacks, density permissions, servicing, and existing structure — and give you a direct answer. Hamilton’s Missing Middle and infill housing policies have expanded what’s permitted on many residential lots. If you’re not sure what’s possible on your property, that’s exactly what the feasibility assessment is for.

Every project is different — existing structure, unit count, finishes, and scope all affect the number. We give you a realistic cost range during the feasibility review so you can validate your ROI before committing to anything. From there, the full proposal is a fixed price. The number you approve is the number you pay.

Tarion registration is a provincial requirement for new residential builds and for builders taking on certain complex structural scopes. Most renovation contractors are not Tarion-registered — which limits what they can legally build. As a registered builder, Gateway can take on full structural and new-build scope that others cannot, and provides the warranty accountability that comes with that designation. You can verify our registration directly on the Tarion public registry.

What Our Clients Say

★★★★★ 4.9 · 65+ Google reviews
Investor Project
★★★★★

"Charles and Dan provided answers to every question I could think of, clear instructions for processes I didn't understand, and a plethora of well-vetted professional contacts for every step of the project. They also acted as liaisons on my behalf and spearheaded communications with the City of Hamilton — saving me countless hours and money. When the city dropped the ball on finalizing the project, Charles and his team were relentless in holding them accountable. I believe the value they provided was at least 5x the fee charged."

CB
Cameron Bellavia Severance & Development Project · Hamilton
★★★★★

"Working with Gateway Group is an absolute treat. Their team is exceptionally professional, consistently prompt, and always true to their word. The quality of their work is outstanding — they pay close attention to detail, communicate clearly throughout the process, and deliver results that exceed expectations. It's rare to find a company that combines reliability, craftsmanship, and genuine care for their clients the way Gateway Group does."

AO
Adrian Ondiano Four Chambers Properties Inc. · Hamilton
★★★★★

"Simply put, Gateway Group can complete builds and renovations other experienced renovating companies cannot. They arrived on schedule, communicated clearly about the work planned, and consistently reviewed progress at the end of each day. If they saw a potential issue, they brought it to your attention and offered alternative solutions. Renovating 100+ year old homes comes with multiple challenges — Gateway understood the assignment and executed it flawlessly."

AL
Ashton Lo Hamilton
🏆 WEHBA Award of Distinction
⭐ 4.9 / 5 Google Rating
🛡️ Tarion-Registered Builder
📋 WSIB + Fully Insured
🏗️ 12+ Years in Hamilton
🏛️ Missing Middle Subcommittee
READ THEIR STORY

Melanie Parish

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.

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Heather Fontez

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.

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Sokly Tang

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.

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Greg Borys

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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