---
title: "RD4 zone in Delta: Infill Duplex Residential Zone"
place: Delta, British Columbia, Canada
place_path: ca/bc/delta
zone: RD4
bylaw: Delta Zoning Bylaw No. 7600, 2017 (consolidated for reference purposes to April 21, 2026, incorporating amendments up to Bylaw No. 8552)
bylaw_read: 2026-11-07
review: draft
canonical: "https://govhandbook.com/ca/bc/delta/zoning/rd4/"
json: "https://govhandbook.com/ca/bc/delta/zoning/rd4.json"
---

# RD4 zone in Delta: Infill Duplex Residential Zone

Infill duplex housing on smaller duplex lots.

## Zone rules

- **Purpose:** Infill duplex housing on smaller duplex lots.
- **Main uses:** Duplex dwelling
- **Also allowed (secondary uses):** Home occupation; Secondary suite (accessory to a side-by-side duplex dwelling)
- **Minimum lot area:** 504 m² (subdivision under the Land Title Act); 252 m² (bare land strata lot)
- **Minimum lot width:** 18 m, average lot depth 28 m (Land Title Act); 9 m, average lot depth 28 m (bare land strata)
- **Maximum lot coverage:** 45%
- **Maximum density:** Floor space ratio 0.3 of lot area plus 93 m². In North Delta, total gross floor area is limited to the lesser of 360 m² (Land Title Act lots) or 180 m² (bare land strata lots) and that amount
- **Maximum height:** 2.5 storeys; 8 m to mid-roof or top of a flat roof; 9.5 m to roof ridge of a pitched roof
- **Maximum height, accessory buildings:** 1 storey; 3 m to mid-roof or top of a flat roof; 3.75 m to roof ridge of a pitched roof
- **Front setback:** 6.5 m on arterial and collector streets; 5 m on other streets (garages 6 m unless garage doors do not face the street); accessory 12 m
- **Rear setback:** 7.5 m (principal); accessory 1 m
- **Interior side setback:** 1.5 m; 0 m at the shared wall of a duplex dwelling; accessory 1 m
- **Street side setback:** 3.5 m (principal); accessory 6.5 m
- **Accessory building setbacks:** front 12 m, interior side 1 m, exterior side 6.5 m, rear 1 m
- **Other rules:** A maximum of 1 duplex dwelling per Land Title Act lot; 1 dwelling unit per bare land strata lot; A secondary suite here means an accessory dwelling unit within one unit of a side-by-side duplex

## Source

- [Delta Zoning Bylaw No. 7600, 2017 (consolidated for reference purposes to April 21, 2026, incorporating amendments up to Bylaw No. 8552), s. 12.40](https://delta.civicweb.net/document/177229#page=172) (read 2026-11-07)

Rules in the bylaw's general sections (parking, fences, suites, home businesses) also apply. All zones in Delta: https://govhandbook.com/ca/bc/delta/zoning/index.json

_Draft: taken from the bylaw text by a research agent and not yet reviewed by a person. Gov Handbook is an independent guide. Canonical page: https://govhandbook.com/ca/bc/delta/zoning/rd4/_