RM4 zoning in Port Moody: what can you build?
Medium Density Townhouse Residential
On a standard lot with a rear lane, RM4 allows about 4 units on a 33 × 122 ft lot (townhouses with underground parking); about 6 units on a 50 × 122 ft lot (townhouses with underground parking); about 8 units on a 66 × 122 ft lot (townhouses with underground parking). These figures come from running BuildHere’s engine on each lot size with the Port Moody 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 | About 4 units | Townhouses with underground parking | 4,831 sq ft |
| 50 × 122 ft6,100 sq ft | About 6 units | Townhouses with underground parking | 7,321 sq ft |
| 66 × 122 ft8,052 sq ft | About 8 units | Townhouses with underground parking | 9,663 sq ft |
Building options on a 33 × 122 ft lot
| Option | Status | Units | Max floor area |
|---|---|---|---|
| Townhouses | Allowed | About 3 | 4,026 sq ft |
| Townhouses with underground parking | Allowed | About 4 | 4,831 sq ft |
Size limits for townhouses with underground parking on a 33 × 122 ft lot
| Max floor area (FSR 1.20) | 4,831 sq ft | PM RM4 s.9.5.3 a |
|---|---|---|
| Max height | 34.4 ft, about 3 storeys | PM RM4 s.9.5.3 |
| Site coverage | 40% of site | PM RM4 s.9.5.3 |
| Front setback | 13.1 ft | PM RM4 s.9.5.3 |
| Side setback | 6.6 ft | PM RM4 s.9.5.3 |
| Rear setback | 9.8 ft | PM RM4 s.9.5.3 |
| Rough building footprint | up to 1,615 sq ft | Estimate, not a design |
| Parking stalls required | 8 stalls (minimum) | PM s.6.3.1 |
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 Port Moody.
Common questions
How many units can I build in RM4 zoning in Port Moody?
With a rear lane and outside a frequent-transit area, RM4 allows about 4 units on a 33 × 122 ft lot (townhouses with underground parking); about 6 units on a 50 × 122 ft lot (townhouses with underground parking); about 8 units on a 66 × 122 ft lot (townhouses with underground parking). 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 RM4 rules come from?
From City of Port Moody Zoning Bylaw, 2018, No. 2937, consolidated for convenience (through Amendment Bylaw No. 112, 2025, No. 3523), s.9.2 to s.9.9, Consolidated for convenience, amendments listed to Bylaw 3523 (adopted 2026) consolidation (rules approved 2026-10-20). Preliminary screening only. Verify with the City of Port Moody.