A legal basement suite in Burnaby can add $1,800–$2,500 a month in rental income and meaningfully bump your property's resale value. But there's a meaningful gap between a finished basement and a legal suite — and that gap matters both for your safety and for whether the City will let you rent it out.
Here's an honest breakdown of what Burnaby actually requires, whether your basement is a realistic candidate, what it costs, and how long it takes.
What makes a suite "legal" in Burnaby?
Burnaby permits secondary suites under the BC Building Code and its own Secondary Suite Bylaw. To pass inspection, your suite needs to hit every one of these boxes — there's no partial credit.
- Separate entrance. The suite must have its own exterior door — not through the main unit's living space. This is often a side-yard or rear entrance.
- Minimum ceiling height of 1.95 m (6 ft 5 in). That measurement is taken under the joists, beams and any ductwork — not just the open slab-to-subfloor distance. A lot of older Burnaby homes fall short here, which leads to underpinning or dig-out work.
- Egress windows in all sleeping rooms. Each bedroom needs a window with a minimum clear opening of 0.35 m² and a minimum dimension of 380 mm — big enough for an adult to escape and a firefighter to enter. Existing basement windows almost always fail this requirement.
- Fire and sound separation. You need a one-hour fire-resistance rating between the suite and the main unit — typically achieved with two layers of 5/8" Type X drywall on the ceiling above the suite and a fire-rated door on any shared interior access. Smoke alarms and carbon monoxide detectors in both units are mandatory.
- Dedicated mechanical. The suite needs its own heating source. Sharing the main unit's forced-air system without separate controls is not acceptable. A ductless mini-split heat pump is the most common solution now, and it serves double duty as air conditioning.
- Parking. Burnaby requires one off-street parking space per dwelling unit. If your property only has one space now, you'll need to confirm two spaces can be created before the City will issue a permit. Lane-access lots in East Burnaby and South Burnaby usually handle this fine; some strata lots cannot.
- Plumbing and electrical. The suite needs a full kitchen (not a wet bar) and a complete bathroom — permitted and inspected. Electrical needs to be on a separate sub-panel in most cases.
Does your basement qualify?
Before you spend anything, two things to honestly assess:
Ceiling height
Grab a tape measure. Go to the lowest point in your basement — typically under a beam or a duct — and measure floor to ceiling. If you're consistently at 6'5" or better under all the obstructions, you're likely fine. If you're at 6'0"–6'4", it's marginal and depends on the inspector. Under 6'0" means you're looking at a dig-out or underpinning job, which changes the budget significantly.
Moisture
Walk your basement perimeter after a heavy rain. Any efflorescence (white salt staining on concrete), active seepage, or musty smell is a problem you need to solve before you frame and insulate a suite. Trapping moisture inside new walls leads to mould — and if it shows up during an inspection or a rental, the consequences are serious. Waterproofing is a boring line item but it's the one we won't skip.
Realistic cost bands
We give fixed quotes — not hourly estimates — so these numbers are based on real projects we've built in Burnaby, not national averages from a home-improvement website.
- Finish-only suite ($45K–$70K): Your basement is already at the right height, dry, and has basic framing in place. You're adding a proper kitchen, bathroom, egress windows, fire separation, mini-split, separate entrance door, and going through permits. This is the best-case scenario for older Burnaby homes with decent bones.
- Full legal suite from unfinished ($70K–$110K): Starting from bare concrete. Includes framing, full insulation, vapour barrier, plumbing rough-in, electrical sub-panel, kitchen, bathroom, egress windows, fire ceiling, mini-split, exterior entrance, and all permits and inspections. This is the most common project scope.
- Dig-out or underpinning for ceiling height ($120K–$200K+): If you need to lower the slab to hit the required height, you're looking at structural work — underpinning the foundation, excavating the floor, waterproofing the new slab, and then building the suite on top of that. It's a significant project but it can unlock a basement that otherwise has no viable path to legal status.
Budget an additional 10–15% contingency on any project that involves opening walls in a home built before 1990 — asbestos in popcorn ceilings and vermiculite insulation is common in Burnaby's older housing stock and requires certified abatement before any renovation work can proceed.
How long does it take?
For a full legal suite from an unfinished basement, budget 10–16 weeks from permit issuance to occupancy. The breakdown looks roughly like this:
- Weeks 1–2: Design, drawings, permit application to the City of Burnaby. Burnaby's building permit processing for secondary suites currently runs 3–6 weeks — so permit issuance is typically weeks 4–7 from when you kick off. We submit the application while you're making finish decisions, so that time isn't wasted.
- Weeks 1–3 (overlapping): Any abatement, waterproofing, or structural work that needs to happen before framing.
- Weeks 7–14: Framing, rough plumbing, rough electrical, insulation — followed by the framing and rough-in inspection from Burnaby Building Inspections.
- Weeks 14–16: Drywall, finishes, kitchen installation, bathroom tile, mini-split, exterior door, final electrical and plumbing connections. Final inspection, occupancy permit issued.
If you need a dig-out, add 4–8 weeks to the front of that schedule.
The rental income upside
Burnaby's rental market is consistently tight. The areas nearest SFU — Burnaby Heights, Capitol Hill, Government Road corridor — and the Metrotown and Brentwood neighbourhoods near SkyTrain draw strong tenant demand year-round. A legal one-bedroom suite in those areas typically rents for $1,800–$2,200/month. A two-bedroom runs $2,200–$2,700/month. At those rates, a $90K project can pencil out on paper in 4–5 years — before you count the property value uplift.
The "legal" part matters for two reasons beyond safety: first, Burnaby bylaw officers do respond to complaints about illegal suites, and the fines and forced closures are real. Second, if you ever sell, a legal permitted suite shows up as a feature with City records to back it — an unpermitted one is a liability disclosure.
Common gotchas
- Moisture you didn't see. We open walls and find wet framing in probably one in four Burnaby basement projects. Budget for it.
- Undersized egress. The existing basement windows almost never meet the 0.35 m² clear-opening requirement. Cutting new window wells and installing proper egress windows is almost always part of the scope.
- Electrical panel at capacity. Older Burnaby homes often have 100-amp service that's already fully loaded. Adding a sub-panel for the suite — and frequently upgrading the main panel to 200 amps — adds to the electrical budget. We check this at the design stage.
- No lane access for parking. If your lot doesn't have an existing second parking space and doesn't have lane access to create one, the City won't approve the suite. This is a hard stop worth checking before you start.
Our basement renovation work covers the full range of these projects — from straightforward suite builds to full dig-outs. We also build suites across the region as part of our Burnaby renovations practice, and within larger whole-home renovation projects where clients are reconfiguring multiple floors at once.
Ready to find out if your basement qualifies?
The fastest way to know if your Burnaby basement is a realistic candidate — and what it will actually cost — is a site visit. We'll check the ceiling height, look at the moisture situation, confirm the parking, and give you a straight answer before you spend anything. No obligation, no sales pitch.
Book a Free Consultation →