06/05/2026
The permit timeline is one of the most important numbers in your pro forma.
Here's what it actually looks like in Hamilton.
Two tracks and they're not the same.
Duplex (as-of-right): If your property is already zoned as-of-right for a duplex conversion, the building permit process typically runs 3 to 6 months.
Fourplex or complex infill: If your property is already zoned as-of-right for a fourplex or complex infill, the building permit process typically runs 6 to 12 months.
Most investors find out which track they're on too late.
At Gateway, we own the permit from first submission through every inspection, with full accountability throughout the process.
Our founder, Charles, sits on Hamilton's Missing Middle and Infill Development Subcommittee. That's not a website credential. It means we know how Hamilton's approval process works, and we build that into your timeline from day one.
Comment DUPLEX, and we'll walk through what's realistic for your project.