21578 Thornton Ave

Lot facts

Address

21578 Thornton Ave

City

Maple Ridge

PID

017-420-202

Lot size

645 m² · 6,943 ft²

Zone

RS-1b Houses, duplexes & small multiplexes RS-1b rules

Homes guide

How many homes can I build in Maple Ridge?

Property tax

$4.54 per $1,000 of assessed value

• In the Agricultural Land Reserve (farmland rules apply)

Zoning rules · RS-1b · Single Detached (Medium Density) Residential

Medium-density single detached residential use with a minimum lot area of 557 m2 (s.607.1).

Floor area

No floor-area ratio: size is set by height, setbacks and coverage

Max height

31 ft (9.5 m)

Max building footprint

4,166 ft² (387 m²)

Setbacks

front 5.5 m, side 1.5 m, rear 6.0 m, flanking side 3.0 m

Homes

Inside the Urban Containment Boundary (Urban Infill Residential, s.402.29): up to 3 homes on lots <= 280 m2; up to 4 on lots > 280 m2 and <= 0.4 ha; up to 6 on lots within 400 m of a Prescribed Bus Stop; lots > 0.4 ha limited to 3 (house + secondary suite + detached garden suite). Not permitted in Transit-Oriented Areas (Schedule H, s.402.29.7(e)). Forms: single detached, duplex, triplex, fourplex, courtyard and townhouse (by lot area), plus secondary suite and detached garden suite.

Maple Ridge Zoning Bylaw No. 7600-2019 (consolidated to 2026-07-28) · s.607.1-607.11, 402.11, 402.24, 402.29, 402.31, 403.4. Estimated from the bylaw for a lot of this size; confirm with the city before buying or building.