RM-3 zoning in White Rock: what can you build?
High Density Multi-Unit Residential
On a standard lot with a rear lane, RM-3 allows about 6 units on a 50 × 122 ft lot (apartment building); about 12 units on a 66 × 122 ft lot (apartment building). These figures come from running BuildHere’s engine on each lot size with the White Rock rules for this zone.
Most units by lot size
| Lot (with lane) | Most units | Building form | Max floor area |
|---|---|---|---|
| 33 × 122 ft4,026 sq ft | None outright | – | – |
| 50 × 122 ft6,100 sq ft | About 6 units | Apartment building | 6,148 sq ft |
| 66 × 122 ft8,052 sq ft | About 12 units | Apartment building | 15,403 sq ft |
Building options on a 50 × 122 ft lot
| Option | Status | Units | Max floor area |
|---|---|---|---|
| Apartment building | Allowed | About 6 | 6,148 sq ft |
Size limits for apartment building on a 50 × 122 ft lot
| Max floor area (FSR 1.01) | 6,148 sq ft | WR RM-3 s.6.10.4 |
|---|---|---|
| Max height | 75.5 ft, about 7 storeys | WR RM-3 s.6 |
| Site coverage | 45% of site | WR RM-3 s.6 |
| Front setback | 19.7 ft | WR RM-3 s.6 |
| Side setback | 19.7 ft | WR RM-3 s.6 |
| Rear setback | 19.7 ft | WR RM-3 s.6 |
| Rough building footprint | up to 883 sq ft | Estimate, not a design |
| Parking stalls required | 9 stalls (minimum) | WR s.4.14.1 |
Your lot will differ.
Frontage, depth, lane access, corner lots and frequent-transit areas all change the answer. Search your address for a report on the real lot in White Rock.
Common questions
How many units can I build in RM-3 zoning in White Rock?
With a rear lane and outside a frequent-transit area, RM-3 allows about 6 units on a 50 × 122 ft lot (apartment building); about 12 units on a 66 × 122 ft lot (apartment building). Smaller lots fall short of the zone's minimums. Your own lot's frontage, depth and location change the result.
What is FSR?
Floor space ratio (FSR) is a building’s total floor area divided by the lot area. An FSR of 1.0 on a 4,026 sq ft lot allows about 4,026 sq ft of floor area across all storeys. Some bylaws, such as Burnaby’s R1, set no FSR at all; there BuildHere shows an effective FSR worked out from the height, setback and lot coverage limits.
Where do these RM-3 rules come from?
From City of White Rock Zoning Bylaw, 2024, No. 2506, consolidated as of June 2026: s.4.14 Off-Street Parking Requirements, s.4.10 and 4.11 floor area, s.6.1 to 6.11 (RS-1, RS-2, RS-3, RI-1, RE-1, RE-2, RM-1 to RM-4 zones), Consolidated for convenience, June 2026 consolidation (rules approved 2026-10-20). Preliminary screening only. Verify with the City of White Rock.