SSMUH BC: Turn Your Lot Into 3, 4, or 6 Units

Date Published: April 17, 2026

The Single-Family Neighborhood Has Evolved

Under BC's Small-Scale Multi-Unit Housing (SSMUH) legislation, the barriers to building multiplexes have been lowered—but the technical requirements for a building permit have never been more complex. If you own a lot in the Lower Mainland, you are likely sitting on significantly more density than you were two years ago. But "zoning-as-of-right" doesn't mean "automatic approval."

The 3, 4, or 6-Unit Math: Where Do You Fit?

The number of units you can build is no longer a negotiation with City Hall; it's a calculation based on your lot size and proximity to transit.

• Small Lots (Under 280 m² / 3,014 sq ft): You are permitted a minimum of 3 units.
• Standard Lots (Over 280 m²): Most residential lots in Burnaby, Coquitlam, and Surrey now allow for 4 units.
• Frequent Transit Zones: If your lot is within 400 meters of a "frequent transit" stop (bus service every 15 minutes), you may be eligible for 6 units with zero mandated on-site parking.

Bill 25: The 2026 "Loophole" Closer

Many homeowners were previously told their lots didn't qualify for SSMUH because they already allowed a secondary suite and a coach house. Bill 25 (2025) changed that. As of June 30, 2026, almost every residential zone in urban BC municipalities must comply with the new multiplex standards. If you were rejected for a multiplex in 2024, it is time for a zoning re-evaluation.

The Technical Hurdle: From "Idea" to "Permit Drawings"

While you no longer need a public hearing for these projects, you still need a rigorous Permit Drawing Package. Municipalities like Burnaby have now moved to 100% digital-only permit intakes (via the My Permits Portal), requiring high-precision CAD files and professional coordination.

To get your SSMUH project approved, your drawings must address:

• Site Coverage & Setbacks: The Province recommends 45-50% coverage for 4-unit builds, but local bylaws still dictate the exact "building envelope."
• Fire Separations: Designing 4 to 6 units on a standard lot requires advanced knowledge of the BC Building Code regarding fire-rated assemblies and exiting.
• The BC Step Code: These aren't just "houses"; they are high-performance buildings. Your design must meet strict energy-efficiency targets to pass the intake stage.

Why a CTech is Your Best "Zoning Navigator"

A developer might sell you a vision, but a Certified Applied Science Technologist (CTech) provides the technical roadmap. At Canadian Blueprint, we bridge the gap between architectural design and permit consulting. We use ProgeCAD 2026 and iGUIDE 3D scanning to ensure your "As-Built" data is perfect before a single line is drawn. This prevents the "Code Non-Compliance" delays that cost tens of thousands of dollars in carrying costs.

Is Your Lot Ready for 4 or 6 Units?

The June 2026 deadline is approaching, and the "Red Tape" is shifting. Don't rely on outdated zoning maps. Contact Canadian Blueprint today for a Lot Density Search and a feasibility review of your multiplex project.

FAQ: Navigate BC's New Multiplex Rules

Do I still need a public hearing for an SSMUH project?

No. Provincial legislation removed the public hearing requirement for small-scale multi-unit housing that complies with zoning. Your application moves directly to technical review.

What if my lot already has a suite and coach house?

Bill 25 closed that loophole. As of June 30, 2026, most urban residential zones must allow the full 3, 4, or 6-unit entitlement regardless of existing secondary units.

Do I need an architect or can a CTech stamp my drawings?

For SSMUH projects under three storeys, a Certified Applied Science Technologist like Edward Vega can prepare and coordinate your permit drawings, often at lower cost and faster turnaround.