RT40 zoning in Delta: what can you build?
Townhouse Residential 40
On a standard lot with a rear lane, RT40 allows about 1 unit on a 33 × 122 ft lot (townhouses); about 2 units on a 50 × 122 ft lot (townhouses); about 2 units on a 66 × 122 ft lot (townhouses). These figures come from running BuildHere’s engine on each lot size with the Delta 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 1 unit | Townhouses | 2,969 sq ft |
| 50 × 122 ft6,100 sq ft | About 2 units | Townhouses | 6,760 sq ft |
| 66 × 122 ft8,052 sq ft | About 2 units | Townhouses | 9,059 sq ft |
Building options on a 33 × 122 ft lot
| Option | Status | Units | Max floor area |
|---|---|---|---|
| Townhouses | Allowed | About 1 | 2,969 sq ft |
Size limits for townhouses on a 33 × 122 ft lot
| Max floor area (FSR 0.74) | 2,969 sq ft | DELTA RT40 s.13.20.4 |
|---|---|---|
| Max height | 31.2 ft, about 2.5 storeys | DELTA RT40 s.13.20.x |
| Site coverage | 45% of site | DELTA RT40 s.13.20.x |
| Front setback | 16.4 ft | DELTA RT40 s.13.20.x |
| Side setback | 9.8 ft | DELTA RT40 s.13.20.x |
| Rear setback | 16.4 ft | DELTA RT40 s.13.20.x |
| Rough building footprint | up to 1,184 sq ft | Estimate, not a design |
| Parking stalls required | 2 stalls (minimum) | DELTA s.8.4.2 |
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 Delta.
Common questions
How many units can I build in RT40 zoning in Delta?
With a rear lane and outside a frequent-transit area, RT40 allows about 1 unit on a 33 × 122 ft lot (townhouses); about 2 units on a 50 × 122 ft lot (townhouses); about 2 units on a 66 × 122 ft lot (townhouses). 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 RT40 rules come from?
From Delta Zoning Bylaw No. 7600, 2017, consolidated for reference purposes (April 21, 2026, through Bylaw 8552): Part 13 Multi-Unit Residential Zones (RH40, RT40, RT50, RT62, RT76, TH-2, RA6, RA20, RA112, RA120), s.8.4.2 parking, Consolidated for reference purposes only, April 21, 2026 consolidation (rules approved 2026-10-20). Preliminary screening only. Verify with the Corporation of Delta.
Other Delta zones
RS1RS2RS3RS4RS4ARS5RS6RS7RD1RD3RD2RD4RSCRSFRH40RT50RT62RT76TH-2RA20RA112RA120RA6RA180R