RD4 zone in Delta: Infill Duplex Residential Zone

Delta, British ColumbiaDraft, not yet reviewedBylaw read 2026-11-07

In short

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 (read 2026-11-07)

Rules in the bylaw's general sections (parking, fences, suites, home businesses) also apply, and a lot can have site-specific rules. The City's consolidation is for reference purposes only; refer to the City's online version for the current consolidation. Older site-specific "CD" zones (CD1 to CD495) are still regulated by the repealed Delta Zoning Bylaw No. 2750, 1977 and are not in this document; only the CDZ zones (CDZ1 onward) are written out here. Zone pages are taken from the bylaw text by a research agent and have not yet been reviewed by a person: confirm with the bylaw before you rely on them. How answers are checked.

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