RS1-S zoning in Port Moody: what can you build?
Single Detached Residential (small lot)
On a standard lot with a rear lane, RS1-S allows up to 4 units on a 33 × 122 ft lot (4 units); up to 4 units on a 50 × 122 ft lot (4 units); up to 4 units on a 66 × 122 ft lot (4 units). 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 | Up to 4 units | 4 units (small-scale multi-unit housing) | 3,221 sq ft |
| 50 × 122 ft6,100 sq ft | Up to 4 units | 4 units (small-scale multi-unit housing) | 4,880 sq ft |
| 66 × 122 ft8,052 sq ft | Up to 4 units | 4 units (small-scale multi-unit housing) | 6,441 sq ft |
Building options on a 33 × 122 ft lot
| Option | Status | Units | Max floor area |
|---|---|---|---|
| Single detached house | Allowed | 1 | 2,818 sq ft |
| House with secondary suite | Allowed | 2 | 2,818 sq ft |
| House with secondary suite and detached additional dwelling unit | Allowed | 3 | 2,818 sq ft |
| 3 units (small-scale multi-unit housing) | Allowed | 3 | 2,818 sq ft |
| 4 units (small-scale multi-unit housing) | Allowed | 4 | 3,221 sq ft |
Size limits for 4 units on a 33 × 122 ft lot
| Max floor area (FSR 0.80) | 3,221 sq ft | PM RS1-S s.5.5, 8.4.4 a |
|---|---|---|
| Max height | 34.4 ft, about 3 storeys | PM RS1-S s.8.x.4 |
| Site coverage | 45% of site | PM RS1-S s.8.x.4 |
| Front setback | 15.1 ft | PM RS1-S s.8.x.4 |
| Side setback | 4.9 ft | PM RS1-S s.8.x.4 |
| Rear setback | 4.9 ft | PM RS1-S s.8.x.4 |
| Rough building footprint | up to 1,808 sq ft | Estimate, not a design |
| Parking stalls required | 2 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 RS1-S zoning in Port Moody?
With a rear lane and outside a frequent-transit area, RS1-S allows up to 4 units on a 33 × 122 ft lot (4 units); up to 4 units on a 50 × 122 ft lot (4 units); up to 4 units on a 66 × 122 ft lot (4 units). 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 RS1-S 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.5.5 Small-Scale Multi-Unit Housing, s.6.3 Required Off-Street Parking, s.8 Single Detached Residential Districts, s.9.1 Semi-Detached Residential (RT), 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.