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When the Lawn Next Door Turns Into a Meadow: What Ontario’s Weed Control Act and Toronto’s Turfgrass By-law Each Regulate

Whether you are the neighbour calling 311 or the owner opening the City’s letter, the rule that applies depends on what is growing, not how tall it looks. Here is how each process runs, step by step, and which dates and dollar amounts are actually written down.

Arthur Zhao · Broker · AZ Real Estate Partners · 2026-10-20

Quick Answer

Is there a law in Toronto that says a yard can’t get “too tall”?

Not in those words. Neither text has a general “too tall” test. Toronto’s Chapter 489 has a height rule only for turfgrass (lawn grass, cut once it passes 20 centimetres), plus separate duties to keep the land free of 10 listed prohibited plants and to keep growth off sidewalks and out of sight lines. Ontario’s Weed Control Act has no height rule at all: it targets the 25 plants listed as noxious weeds in Regulation 1096, wherever they grow, subject to a farmland-distance exception in s.22.

Source: City of Toronto Municipal Code Chapter 489, Turfgrass and Prohibited Plants, §489-2, §489-2.1 and Schedule A (office consolidation, 2021); Weed Control Act, R.S.O. 1990, c. W.5, ss. 3, 22, and R.R.O. 1990, Reg. 1096, Schedule (Ontario e-Laws)

I’m Arthur Zhao, a real estate broker in Toronto. This article starts on the other side of the fence from the person who complains: you open your mail and there is a letter from the City saying your property does not meet a by-law standard and asking you to bring it into compliance by a certain date.

From your neighbour’s window, your yard is the lawn next door. The letter may be the first you hear that anyone has noticed it.

What happens from that day forward depends on which of two separate systems is involved. One is the City of Toronto’s Chapter 489, Turfgrass and Prohibited Plants, run by municipal by-law officers. The other is Ontario’s Weed Control Act, run by weed inspectors, with its own orders, appeal route and bill. Below, I follow each one in the order things happen, then cover who the rules land on (owner, tenant, or the neighbour who complained) and what changes outside Toronto.

Toronto track: advisory letter with a comply-by date

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No action: a by-law officer follows up and may issue an order

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Order not met: the City does the work at the person’s expense; the cost may go on the property tax bill

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Provincial track (noxious weeds only): weed inspector order, appeal window, inspector does the work, statement, then the tax roll

The Toronto track: from advisory letter to tax bill

Chapter 489 was renamed from “Grass and Weeds” to “Turfgrass and Prohibited Plants” by By-law 662-2021, which came into force on January 1, 2022. The steps below are the City’s process under that chapter.

Day one: the advisory letter

According to the City of Toronto’s Turfgrass & Prohibited Plants page (2026), “If a property does not meet City standards, the City may send an advisory letter to the property owner notifying them to comply with bylaw requirements. Property owners will be asked to comply with the bylaw by a certain date.”

The first job is to work out which rule the letter is about, because Chapter 489 contains several different duties for the “owner or occupant of private land”:

§489-2 A: cut the turfgrass whenever it exceeds 20 cm in height or length.
§489-2.1 A(1): keep the land free of the local weeds listed in Schedule A.
§489-2.1 A(2) and (3): do not let growth obstruct sidewalks or roadways, or restrict driver and pedestrian sight lines at intersections, driveways, sidewalks and walkways, or the visibility of traffic control devices.
§489-2.1 A(4): any other health and safety conditions the Executive Director considers advisable.

The fix for each is different. Cutting the lawn does nothing for a Schedule A plant growing in a flower bed, and pulling a listed plant does nothing for a hedge that blocks a driveway sight line.

Inside Chapter 489: the turfgrass rule and the prohibited-plant rule are two different tests

Turfgrass rule (§489-2 A)

Prohibited-plant rule (§489-2.1 A(1))

What it covers

Turfgrass: “Ground cover of various perennial grasses grown for lawns, of a type that forms a dense, uniform turf if mown.”

The 10 entries in Schedule A, Prohibited Local Weeds

What triggers it

Growth over 20 centimetres in height or length

The plant being on the land at all; the text sets no height or size threshold

What the fix is

Cut the turfgrass

Remove the listed plant

Plants in the yard that are neither

If a planting is not turfgrass, the text of §489-2 A does not reach it (that is my reading of the definition, not a phrase in the by-law)

If a plant is not in Schedule A, this rule does not reach it; the sidewalk, sight-line and health-and-safety duties still can

Ticket amount on the City’s fine table

$500.00 (489-2A)

$500.00 (489-2.1 A(1))

💡 If your letter does not say which rule is involved, ask the City before you start work, because the two call for different fixes.

ℹ️Two of the four §489-2.1 duties are about where plants grow, not what they are. A row of perennials that leans over a public sidewalk can fall under §489-2.1 A(2) even though nothing in it is on Schedule A.

If nothing changes: the officer and the order

The City’s page continues: “If no action is taken, a bylaw enforcement officer will follow up to take appropriate action to achieve compliance with the bylaw.” Chapter 489 gives that officer these tools:

Entry to inspect (§489-3.2): under section 376 of the City of Toronto Act, 2006, an officer “may enter upon land within the City at any reasonable time” to check compliance, and may take photographs, samples and tests.
Orders (§489-3.3 A): an officer who finds a contravention may order the activity to stop, or order work to correct it, under section 384 or 385 of the City of Toronto Act, 2006.
Service (§489-3.3 C): an order may be served personally or by registered mail to the person’s last known address; by mail it is “deemed to have been given on the third day after it is mailed.” If the City cannot serve the owner or occupant that way, a placard posted in a conspicuous place on the land counts as notice (§489-3.3 E).
Immediate effect (§489-3.3 B): where the Executive Director decides a delay would endanger someone’s health or safety, an order can take effect immediately.

Chapter 489 itself does not describe an appeal from these orders. I have not verified one for this article, so if you disagree with an order, read the order document closely and ask the issuing officer in writing what review route applies.

If the order is not met: the City does the work, and the bill

Under §489-3.4, if a person fails to comply with an order to do work, the Executive Director or General Manager, or people acting on their instructions, “may enter the lands at any reasonable time for the purposes of doing the things described in the order at the person’s expense.”

The by-law text says “at the person’s expense”. How that expense is collected is described on the City’s page: “the City can carry out maintenance work to ensure compliance and the cost of that work may be added to the property tax bill.”

Separately from the cost of the work, there are fines:

The City’s fine table lists $500.00 for each of six offences: the turfgrass rule, each of the four §489-2.1 A duties, and failing to comply with an order (489-3.1 A).
The chapter’s ceiling on conviction is higher: a fine of no more than $100,000 (§489-3.1 A), and each offence is a continuing offence with a maximum of no more than $10,000 for each day or part of a day it continues (§489-3.1 E).

The provincial track: a weed inspector under the Weed Control Act

This track exists everywhere in Ontario, Toronto included. Chapter 489 says so itself: §489-4 B states that nothing in the chapter affects “the application and enforcement of the Weed Control Act with respect to noxious weeds growing on land, including within a natural garden.” Section 6(1) of the Act requires every upper-tier and single-tier council to appoint area weed inspectors; s.8(1) lets other municipalities appoint municipal weed inspectors.

Two limits shape whether this track applies to a particular yard:

Only listed plants. Under s.3, “Every person in possession of land shall destroy all noxious weeds on it.” A noxious weed is a plant on the Schedule to R.R.O. 1990, Reg. 1096 (25 items), or a “local weed” a council has designated under s.10, which takes effect only once the Minister approves the by-law (s.10(3)). Long grass that is not on a list is not a noxious weed.
Distance from farm or horticultural land. Section 22: “Sections 3, 13, 16 and 18 do not apply to noxious weeds or weed seeds that are far enough away from any land used for agricultural or horticultural purposes that they do not interfere with that use.” If a city lot is far enough from such land that the weeds do not interfere with it, the s.3 duty and the s.13 inspector’s order do not apply to those weeds. The Act does not give a distance; it is a question of fact for each property.

Inspection and the written order

To search for noxious weeds, an inspector may enter land and buildings “at any time between sunrise and sunset”, “except a dwelling house” (s.12(1)), and must show identification on request (s.12(2)). If refused entry, the inspector may apply to a justice of the peace for a warrant (s.12(3)–(4)).

An inspector who finds noxious weeds may order the person in possession of the land to destroy them (s.13(1)). The order must be in the prescribed form and give at least seven days, excluding Saturdays and holidays, from service (s.13(2)). If it is mailed, service is effective on the seventh day after mailing (s.13(4)). Where there is evidence that the person in possession is not the owner, the order must be served on both (s.13(5)).

Reg. 1096 s.4(1) lists the accepted ways to destroy noxious weeds: pulling or otherwise removing the plants, cutting roots or stalks before the seeds can ripen, plowing or cultivating, or treating with a herbicide. Section 4(4) adds that nothing in the section authorizes any herbicide use that is contrary to any other Ontario law.

The appeal window

Section 13(6): “A person who is served with an order under subsection (5) may, within seven days after service, appeal the order or any requirement contained in it to the chief inspector, giving reasons for the appeal.” The appeal and reasons must be in writing (s.13(7)). The chief inspector may view the land, then confirm the order, revoke it, or make a new one (s.13(9)–(10)). That decision may be appealed to the Divisional Court within thirty days of its making (s.13(12)).

Note the wording: the right is attached to an order served “under subsection (5)”, which is the owner-plus-person-in-possession situation. The text does not directly say whether an owner-occupier served under s.13(3) alone has the same right. If that is your situation, raise it with the chief inspector in writing inside the seven days rather than assume either way.

⚠️The Weed Control Act appeal goes to the chief inspector, in writing, within seven days after service (s.13(6)–(7)). Doing the weeding does not take the place of filing an appeal if you disagree with the order.

If the order is not met: the inspector does the work, and the bill goes on the tax roll

If the order is not complied with, the inspector may have the weeds destroyed in the prescribed manner (s.15(1)). Reg. 1096 s.5 sets conditions, including that the inspector is of the opinion that, except for poison ivy and ragweed, other lands are likely to be damaged by the weeds spreading.

Then the money follows a fixed path:

The inspector records the expenses for each parcel (s.15(2)); the municipal clerk serves a statement and a request for payment on both the person in possession and the owner (s.15(3)).
If it is not paid within fifteen days after service, the clerk presents it to council, and council orders it paid out of the municipality’s general funds (s.15(5)).
That amount has priority lien status and “shall be added to the tax roll against the respective parcels concerned” (s.15(6)).
A person may apply to council to cancel, reduce or refund an amount levied in the year for weed-control orders, and may appeal to the Assessment Review Board in the same manner as for taxes under the City of Toronto Act, 2006, s.323, or the Municipal Act, 2001, s.357 (s.17).

Fines are separate. According to the Weed Control Act (Ontario e-Laws), s.23(1), a conviction carries $500 to $2,000 for a first offence and $1,000 to $5,000 for each subsequent offence, and s.23(2) says this applies even though an inspector has caused or may cause the weeds to be destroyed.

💡 My own view is that the date that matters most after a weed notice is not the date the plants have to be gone. It is the paperwork deadline. Under the Weed Control Act, an appeal (where s.13(6) applies) must reach the chief inspector within seven days after service, and once a statement of expenses is served, the payment clock is fifteen days before the amount moves toward the tax roll with priority lien status. On the Toronto side, a mailed order is deemed given on the third day after mailing, so the clock may already be running by the time you open the envelope. The cutting or pulling can be arranged after the fact; a missed appeal window or payment date cannot be undone the same way.

Who the rules land on: owner, tenant, and the neighbour who complained

The owner. Under the Weed Control Act, “owner” means the person shown as owner on the last revised assessment roll (s.1), and the owner is deemed to be the person in possession “unless the contrary is proved” (s.4). The City’s page describes its advisory letters as going to the property owner.

The tenant. Chapter 489 puts its duties on the “owner or occupant of private land”, and its definition of OWNER includes “a lessee or occupant of the land who, under the terms of a lease, is required to repair and maintain the land.” So whether a tenant is personally responsible for the yard under Chapter 489 can depend on what the lease says. Under the Weed Control Act, where there is evidence that the person in possession is not the owner, orders and expense statements are served on both (s.13(5), s.15(3)). Who ultimately bears the cost between landlord and tenant is a lease question; the statutes above do not settle it.

The neighbour who complained. The City’s page invites residents to report through 311, notes that “Complaints are seasonal and generally only accepted during growing season,” and encourages complainants “to clearly identify their concern” and submit photos. In practice that means naming the rule: lawn grass over 20 cm, a specific Schedule A plant, or growth blocking a sidewalk or sight line.

What a complaint can and cannot rest on

Things the texts above do cover:

Turfgrass over 20 cm (Chapter 489, §489-2 A).
Any of the 10 Schedule A plants on private land in Toronto (§489-2.1 A(1)).
Growth obstructing sidewalks or roadways, or restricting sight lines (§489-2.1 A(2)–(3)).
Any of the 25 Reg. 1096 noxious weeds, subject to the s.22 distance exception (Weed Control Act).

Things they do not cover by their own terms:

A planting that is tall but is neither turfgrass nor a listed plant, and is not blocking a sidewalk, road or sight line.
Plants that appear on neither list. Dandelions, for example, are not on the Reg. 1096 Schedule or on Schedule A.
How a yard looks. None of these provisions turns on tidiness.

Toronto has other chapters on property standards and property maintenance (the Chapter 489 history note points to Chapters 629 and 623), which are outside the scope of this article.

Outside Toronto

The Weed Control Act applies across the province, subject to s.22. Chapter 489 is a Toronto by-law, and its 20 cm number and Schedule A list are Toronto’s. Other municipalities have their own property standards or grass by-laws, so the height limit, plant list and enforcement steps are whatever your own municipality’s by-law says. Check that by-law directly rather than relying on Toronto’s numbers.

If the letter or order is on your kitchen table

Grouped by what you will need to keep track of.

Documents

☐Keep the letter or order and the envelope, since mailed service dates run from the mailing date.
☐Identify which provision is cited: §489-2 A, one of §489-2.1 A(1)–(4), or a Weed Control Act order under s.13.
☐Photograph the yard before and after the work, with dates.
☐Pull out your lease if the property is rented, and find the clause on who maintains the grounds.

Dates

☐Write down the comply-by date in the City’s letter.
☐Count a Toronto order sent by registered mail as given on the third day after mailing (§489-3.3 C).
☐Count a mailed Weed Control Act order as served on the seventh day after mailing (s.13(4)).
☐File any s.13(6) appeal, in writing, within seven days after service.

Money

☐Note the fifteen-day window after a Weed Control Act expense statement is served; unpaid, it moves toward the tax roll (s.15(5)–(6)).
☐Ask council to cancel, reduce or refund a weed-control levy if you think it is wrong (s.17).
☐Check your property tax bill for any added City work charge.

Sources

Frequently Asked Questions

What is the difference between Toronto’s Schedule A and the noxious weed list in Reg. 1096, and what if a plant is on both?

Schedule A to Chapter 489 lists 10 prohibited local weeds enforced by Toronto by-law officers; the Schedule to Reg. 1096 lists 25 noxious weeds under the provincial Weed Control Act, enforced by weed inspectors. Several plants appear on both, including Canada thistle, giant hogweed, poison ivy, ragweed and dog-strangling vine (listed under different scientific names), and §489-4 B says Chapter 489 does not affect the Weed Control Act. So a plant on both lists can be dealt with under either track.

Can I appeal a weed inspector’s order, and to whom?

Under Weed Control Act s.13(6), a person served with an order under s.13(5) may appeal to the chief inspector within seven days after service, in writing with reasons (s.13(7)). The chief inspector’s decision may be appealed to the Divisional Court within thirty days (s.13(12)). The text ties the right to s.13(5) service, so an owner-occupier served alone should raise the question with the chief inspector in writing within the same seven days.

Can a weed inspector or by-law officer come into my backyard without asking?

A weed inspector may enter land and buildings between sunrise and sunset to search for noxious weeds, but not a dwelling house (Weed Control Act s.12(1)), and must show identification on request. If refused, the inspector can seek a warrant from a justice of the peace (s.12(3)–(4)). A Toronto by-law officer may enter land at any reasonable time to inspect for Chapter 489 compliance, under section 376 of the City of Toronto Act, 2006 (§489-3.2).

What did Toronto’s By-law 662-2021 change, and where does that leave a natural garden?

By-law 662-2021, in force January 1, 2022, renamed Chapter 489 from “Grass and Weeds” to “Turfgrass and Prohibited Plants”, amended the 20 cm rule in §489-2 A so that it now refers to turfgrass (a term the same by-law added as a definition), and added the Schedule A plant list, the sidewalk and sight-line duties, and new offence, entry and order sections. The City says the by-law “has removed the process for natural garden exemptions.” A natural garden still has to meet the Schedule A, sidewalk and sight-line rules, and §489-4 B keeps the Weed Control Act in force inside it.

I rent my home. Am I the one responsible if the yard gets a notice?

It can depend on your lease: Chapter 489 applies to the “owner or occupant”, and it defines owner to include a lessee or occupant who must repair and maintain the land under the lease. Under the Weed Control Act, if the person in possession is not the owner, orders and expense statements are served on both (s.13(5), s.15(3)). Tell your landlord as soon as a notice arrives, so the deadlines are not missed while you sort out who acts.

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