What Vancouver's bylaw actually requires
Vancouver Solid Waste Bylaw No. 8417 requires all properties to maintain organic waste containers in a way that prevents pest attraction. This applies to backyard composters, curbside organics bins, and garden collection bins. The bylaw doesn't specify exact technical standards for backyard composters — it establishes a performance standard (must not attract pests) and leaves the method to the owner. In practice, bylaw enforcement is complaint-driven: a neighbour or inspector who observes rat activity around a compost bin can file a complaint, triggering an inspection and a notice to repair. Fines for non-compliance range from $250-$500.
Burnaby, Richmond, Surrey, and North Vancouver all have similar provisions in their Solid Waste or Pest Control bylaws. The Metro Vancouver Integrated Pest Management guidelines (which cover the broader region) recommend hardware-cloth-bottomed compost bins as the baseline standard for preventing rodent access. These aren't legally binding at the municipal level unless the municipality has adopted them, but they're the technical standard that bylaw officers typically cite when writing notices.
The five compost-management requirements for bylaw compliance
- Hardware-cloth base: install a 19-gauge galvanised hardware cloth panel (quarter-inch mesh minimum) under the bin, extending 30 cm beyond the bin perimeter and anchored to the ground. This prevents rats from burrowing up through the soil directly into the bin contents.
- Secured lid: the lid must close fully with no gap. Weight with a brick or install a latch. Lids that blow open or sit partially open are the most common deficiency in inspection findings.
- No animal products: meat, fish, dairy, and oily cooked food must go in the curbside organics cart, not the backyard composter. These are the highest-attraction food residues for Norway rats.
- Active management: turn the bin weekly. Active composting generates internal temperatures of 50-65°C that make the bin less hospitable and process material faster. Static bins with no turning create cool, stable nesting conditions.
- 1 m clear perimeter: keep ivy, dense ground cover, woodpiles, and garden debris at least 1 m from the bin. Rats approach composters from covered runways; removing cover reduces approach frequency.
Curbside organics carts: different rules, same principle
Metro Vancouver's green curbside organics carts (wheeled bins with locking lids) are designed to be rat-resistant when the lid is properly closed. They're not rat-proof if the lid is held open by overfilling. The practical rules: never leave the cart lid open or propped; put the cart out the morning of pickup, not the night before (reduces overnight exposure); ensure the wheels seat properly when the lid is down (many carts have worn wheel mechanisms that create gaps). Curbside carts are a much lower risk than improperly managed backyard bins because they're enclosed, hard-shelled, and typically in use for shorter periods.
Worm bins and bokashi: the special cases
Worm composting (vermicomposting) and bokashi fermentation are increasingly popular in Metro Vancouver as composting methods for apartments and small yards. Both can attract rodents if improperly managed. Worm bins: the moist, protein-rich contents (food scraps plus worm castings) are attractive to mice. Most commercial worm bins have ventilation holes larger than 6 mm in the lid or sides — mice enter through these. Apply the same hardware-cloth bottom treatment as for a standard composter; cover any ventilation holes with fine mesh. Bokashi: the fermented food in a sealed bucket isn't typically accessible to rodents — the risk is improper sealing (cracked lid, broken seal) or burying pre-composted bokashi in garden beds, which creates a temporary high-attractant soil patch.