RD4 Zoning in Delta — Infill Duplex Residential Zone
RD4 — Infill Duplex Residential Zone is a residential zoning district in the City of Delta. Infill duplex housing on smaller duplex lots.
On a typical RD4-zoned lot you can expect up to 4 dwelling units, an FSR of about 0.3, a hard cap of 360 m² of floor area however large the lot, a maximum height of 9.5 m (2.5 storeys), and site coverage up to 45%. Exact figures vary with lot size, frontage, and form of development — look up your specific address to confirm.
Intent of the RD4 district
Infill duplex housing on smaller duplex lots.
RD4 at a glance
| Max dwelling units | 4 |
|---|---|
| Max units near frequent transit | 6 |
| Floor space ratio (FSR) | 0.3 |
| Max height | 9.5 m |
| Max storeys (by right) | 2.5 |
| Site coverage | 45% |
| Zone category | Residential |
Density tiers in RD4
| Tier | Min lot area | Max units | FSR | Max height |
|---|---|---|---|---|
| Infill Duplex Residential Zone | 504 m² | 4 | 0.3 | 9.5 m |
Permitted uses in RD4
- Duplex dwelling
- secondary suite
- home occupation
RD4 zoning FAQ
What is RD4 zoning in Delta?
RD4 (Infill Duplex Residential Zone) is a residential zoning district in the City of Delta. Infill duplex housing on smaller duplex lots.
What can you build on RD4-zoned land in Delta?
Permitted uses in RD4 include Duplex dwelling, secondary suite, home occupation. Permitted uses are allowed outright; conditional uses may require Development Permit Board approval.
What is the FSR for RD4 in Delta?
Floor Space Ratio (FSR) in RD4 is about 0.3. The ratio is not the whole rule here: floor area is no more than 360 m², so on many lots the absolute figure governs rather than the ratio. ZoneScout calculates the maximum buildable floor area for your specific lot.
How tall can a building be in RD4?
RD4 permits a maximum building height of 9.5 m, generally about 2.5 storeys. Height can be affected by view corridors, setbacks, and the specific form of development.
How many units are allowed in RD4 zoning?
RD4 allows up to 4 dwelling units on an eligible lot. Within a Frequent Transit Area the figure rises to 6, which depends on the lot being close enough to a prescribed transit stop. Under the Province's Bill 44 Small-Scale Multi-Unit Housing rules, most standard residential lots in Delta now permit multiple units outright. The exact number depends on lot size and whether rental tenure is secured.
Other residential zones in Delta
- RA6 — Apartment Residential 6 Zone
- RA20 — Apartment Residential 20 Zone
- RA112 — Apartment Residential 112 Zone
- RA120 — Apartment Residential 120 Zone
- RA180R — Apartment Townhouse Residential 180 Rental Zone
- RD1 — Duplex/Single Detached Residential 1 Zone
- RD2 — Duplex/Single Detached Residential 2 Zone (Beach Grove waterfront)
- RD3 — Duplex/Single Detached Residential 3 Zone
Look up a specific address in Delta
Source: official Delta zoning bylaw (PDF) · updated August 2026