How much does a multiplex conversion cost in Vancouver under the new R1-1 zoning?

Multiplex conversions in Vancouver's new R1-1 zones typically cost $150,000 to $500,000+ depending on the scope, with full teardown-rebuilds ranging from $800,000 to $2+ million for larger projects.

The cost varies dramatically based on your approach. Converting an existing house into 2-3 units through interior modifications runs $150,000-$350,000, covering suite creation, separate entrances, fire separations, updated electrical/plumbing systems, and permits. Major additions or substantial renovations to create 4-6 units typically cost $400,000-$800,000, requiring structural work, building envelope upgrades, and compliance with BCBC 2024's updated seismic requirements.

Full redevelopment — tearing down and building new — represents the highest cost but maximum unit potential. A new 4-6 unit multiplex ranges from $800,000 to $2+ million depending on size, finishes, and site conditions. These projects must use a Licensed Residential Builder registered with BC Housing and include 2-5-10 warranty coverage. The new units are strata-titled ownership or secured rental, each with different financing implications.

Local conditions significantly impact costs. The city's multiplex policy launched in 2024, making Vancouver one of the first major Canadian cities to allow this density on former single-family lots. Projects must comply with BC Energy Step Code (currently Step 3, moving to Step 5 by 2032), adding 5-15% to construction costs. BCBC 2024's new seismic provisions, effective March 2025, require updated lateral bracing — particularly important given Vancouver's high seismic zone. Many older Vancouver Specials and character homes need substantial seismic upgrades.

Permitting and professional costs add $30,000-$80,000 to any project. This includes architectural drawings, structural engineering, energy modeling for Step Code compliance, development and building permits (which can exceed $15,000 in Vancouver), and various consultants. Vancouver's permitting process is notoriously slow — budget 6-12 months for complex multiplex applications, though the city is launching a streamlined process for smaller projects.

Key considerations include your lot size and existing house condition. Standard Vancouver lots (33x120 feet) can typically accommodate 3-4 units, while larger lots support 6+ units. Heritage-designated properties face additional restrictions and costs. The new zoning allows up to 6 ownership units or 8 secured rental units, but rental projects have different financing and regulatory requirements.

— this isn't DIY territory. You'll need architects familiar with multiplex design, structural engineers for seismic compliance, and contractors experienced with complex residential projects.