How Long Does It Take to Build a Legal Secondary Suite?

The two phases: permit review, then construction

A secondary suite has two timelines stacked on top of each other, and most of the confusion we hear from clients comes from mixing them up. Permit review is the City or District of North Vancouver checking your drawings before anyone picks up a tool. Construction is the actual build, and it can't legally start until the permit is issued.

Permit review for a straightforward suite conversion runs 4 to 8 weeks in both the City and District of North Vancouver. That number moves with two things: how complete your drawing package is on first submission, and how busy the building department is that quarter. A package missing a structural detail or a fire-separation spec gets kicked back for revisions, and each revision cycle adds 2 to 4 weeks, since it goes back into the review queue rather than jumping ahead.

• Complete drawing package, no revisions: 4 to 6 weeks
• One revision cycle (missing detail, clarification requested): 6 to 8 weeks
• Multiple revision cycles or a variance required: 10 to 14 weeks

Construction: 10 to 16 weeks on site

Once the permit is issued, a standard basement suite conversion runs 10 to 16 weeks of on-site work. That includes demolition of the existing basement finishes, framing and fire-separation assembly, rough-in for electrical and plumbing, insulation, drywall, flooring, and final trim, with municipal inspections at several fixed points along the way.

Two-bedroom suites, or any suite requiring slab lowering to hit the 1.95-metre ceiling height minimum, land at the top of that range or past it. Slab lowering alone adds 3 to 5 weeks before framing can even start, because the concrete has to be cut, excavated, and repoured before the rest of the build sequences on top of it.

The three delays that add the most time

Three site conditions account for most of the gap between the 14-to-24-week baseline and the projects that run 6 to 9 months. We flag all three at the first site visit, before drawings start, because each one changes the design before it changes the schedule.

• Ceiling height below 1.95 metres: slab lowering adds 3 to 5 weeks and roughly $30,000 to $60,000, and it has to happen before framing, not alongside it
• No existing egress opening: cutting a new window opening through the foundation wall adds 1 to 3 weeks and typically bundles with any exterior entrance work happening at the same time
• Electrical service under 100 amps: a service upgrade to 200 amps before the suite subpanel goes in adds 2 to 4 weeks, most of it waiting on BC Hydro's side of the connection rather than the electrician's

Inspection scheduling: the variable most homeowners underestimate

Municipal inspectors in North Vancouver book on a rolling schedule, and a rough-in or final inspection typically needs to be requested 3 to 5 business days ahead. If a trade finishes early on a Thursday and the inspection isn't booked until the following week, that's dead time on the schedule that has nothing to do with construction speed.

We book inspections the day a stage is substantially complete, not the day it's fully finished, so the inspection date and the finish date land close together instead of stacking. It's a small piece of project management, and it's the difference between a suite that's move-in ready the week construction wraps and one that sits waiting on a sign-off for two more weeks.

What West Vancouver adds to the schedule

West Vancouver runs the slowest permit review of the three North Shore municipalities, and suites there also more often need the licensing step for rented units layered on top of the building permit. Add 2 to 6 weeks to the permit-review side of the timeline for a West Vancouver suite compared to the City or District of North Vancouver, and confirm the current review queue with the District directly before setting a move-in date with a tenant.

How we sequence a suite to protect the schedule

We submit for permit with a complete package the first time: structural details, fire-separation specs, and egress dimensions included from the start, not added after a revision request. That single habit is worth 2 to 4 weeks on most projects, because it skips a full trip through the review queue.

During construction, we book long-lead items, cabinets, windows if a new egress opening is being cut, and any specified fixtures, the same week the permit is issued rather than waiting for framing to finish. A window with a 6-week lead time ordered on day one arrives before it's needed. Ordered after framing, it stalls the whole schedule for a month.