Toronto's Construction Noise Bylaw: Hours, Exemption Permits and the 85 dBA Limit

Toronto regulates construction noise mainly by the clock, not by the decibel. Under Chapter 591 of the Toronto Municipal Code, construction noise that is clearly audible outside permitted hours is an offence, whatever its level. Decibel limits only enter the picture when you work outside those hours under a noise exemption permit: the standard permit condition caps equipment noise at 85 dBA, measured 20 metres from the source.

Construction vibration is a separate regime, under Chapter 363, and it is tied to your building permit rather than to the noise bylaw.

This guide reflects Chapter 591 as consolidated to November 14, 2024, Chapter 363 as consolidated to March 22, 2024, and the City's noise and permit pages as updated in 2026. Bylaws and fees change, so confirm current figures with the City before relying on them.

Need help with an exemption permit, a mitigation plan or monitoring?

Toronto Construction Noise Rules at a Glance

What Toronto's Noise Bylaw (Chapter 591) Covers

Chapter 591 defines construction broadly. It includes erection, alteration, repair, dismantling, demolition, structural maintenance, land clearing, earth-moving, grading, excavating, laying pipe and conduit, street building, applying concrete and installing equipment. It also covers "any work in connection with these activities."

Construction equipment is just as broad: hand tools, power tools, air compressors, pile drivers, cranes, excavators, generators, pumps, concrete mixers and any other material-handling equipment.

That matters for one common misreading. Generators, compressors and pumps on a construction site are construction equipment, not "stationary sources." The bylaw's stationary-source limits (50 dBA by day, 45 dBA at night, or the limits in provincial guidelines such as NPC-300) explicitly exclude premises where the dominant source of sound is construction.

How the Bylaw Got Here

• October 1, 2019: By-law 878-2019 replaced Chapter 591 in full. It set today's construction hours, raised the maximum fine from $5,000 to $100,000 and required builders to obtain exemption permits for certain after-hours work.
• April 7, 2020 to October 7, 2021: Ontario Regulation 130/20 removed the City's power to regulate construction noise between 6 a.m. and 10 p.m. on any day, and at any hour for health-care construction. It was revoked automatically after 18 months.
• June 1 and September 1, 2024: By-law 268-2024 kept the construction hours unchanged. It added "sound-induced vibration" to the definitions of persistent and unreasonable noise, defined points of reception more precisely, introduced Level 1 to 3 screening for exemption permits and created a late-application fee.

Enforcement is handled by Municipal Licensing & Standards (ML&S) bylaw enforcement officers.

Permitted Construction Hours in Toronto

These hours apply to residential and commercial projects alike. The only carve-outs are the exemptions in § 591-3.1 (government work, emergencies, public safety, waste collection), covered below.

The test outside these hours is whether construction sound is clearly audible. No decibel threshold is involved, so an officer does not need a sound level meter to establish the offence. Quiet interior work that is not clearly audible is not caught. A concrete saw, a reversing alarm or an idling delivery truck usually is.

Deliveries: Chapter 591 gives loading and unloading a longer window (until 11 p.m.). But construction includes "any work in connection with" construction activities, and § 591-2.10 says the most restrictive provision applies. The safe reading is to schedule site deliveries inside construction hours, or to include them in your exemption application.

Inside Permitted Hours: No Decibel Cap, but Not a Free Pass

Chapter 591 sets no numeric sound limit on construction during permitted hours. There is no "ambient plus 5 dB" rule for construction in the current bylaw.

There is, however, a lever the City can pull. Under § 591-2.9C, if permitted noise is also unreasonable and persistent, the Executive Director of ML&S can require you to obtain an exemption permit and comply with it. That brings in the permit conditions: a noise mitigation plan, the 85 dBA limit, and City monitoring at your expense.

The bylaw's definitions set the bar:

• Persistent noise: noise or sound-induced vibration heard or felt continuously for 10 minutes or more, or intermittently for a total of 10 minutes within an hour.
• Unreasonable noise: noise or sound-induced vibration that would disturb a reasonable person in the circumstances. The City weighs time of day, volume, duration and whether quieter alternatives exist.

In practice, this is how a daytime complaint problem becomes a permit problem. A site that generates sustained complaints during legal hours can end up operating under permit conditions anyway.

Noise Exemption Permits

Any clearly audible construction outside permitted hours needs a noise exemption permit: an early Saturday start, evening work, a Sunday pour, an overnight crane pick. The City accepts five application types: Amplified or Instrument Sound, Construction, Continuous Concrete Pour, Large Crane Work, and Other.

Two construction activities have their own definitions and their own track:

• Continuous pouring of concrete: slip-forming, deck pour or pre-pour operations that cannot be interrupted once started.
• Large crane work: erecting or dismantling a crane, or any crane work that requires a road closure.

Timeline and Fees (2026)

Apply at least 28 calendar days before the work starts. Later applications pay a late fee on top of the application fee. The City says most applications take three to four weeks, and longer for lengthy projects or those needing mitigation plans or monitoring.

Fees are set in Chapter 441 and indexed annually. Monitoring fees must be paid before the permit is issued.

How the City Scores a Construction Application

The City assigns each application a level using its screening criteria. The level sets the fee, the paperwork and the conditions.

Level 1 is 4 points or fewer, Level 2 is 5 or 6, Level 3 is 7 or more. Do the arithmetic and any multi-unit new build lands in Level 3 by default: it scores at least 8. A large renovation lasting more than three months reaches Level 3 too.

The City can also raise the level based on the requested dates and times, distance to the nearest residence, compliance with previous permits, and verified complaints or charges at the site.

The Councillor Step

This is where permits stall. After screening, ML&S notifies the ward councillor.

• Level 1 or 2: the permit can issue if the councillor does not object within 14 days.
• Level 3: the councillor must respond with no objection. Silence is not enough.
• Continuous concrete pour and large crane work: not sent to the councillor.

If the City refuses, you have 21 days to appeal to the community council, with a fee. Notice of the hearing goes to every resident within 100 metres, at your expense.

A February 2026 staff report shows how this plays out. A 72-storey Yorkville condominium project held a series of Saturday-morning permits from 2022 to 2025. Its August 2025 Level 3 application was refused after the ward councillor objected, and the developer appealed. The report noted 55 construction noise complaints since 2020 and seven summonses in the summer of 2025 for construction during prohibited hours.

The lesson: compliance history and complaint records feed directly into whether your next permit is granted.

What the City Can Ask for in the Application

Beyond the form, ML&S can require (§ 591-3.2A):

• Reasons supporting the exemption.
• A noise mitigation plan, on the City's template.
• A statement certified by a professional engineer or acoustical consultant for any sound that is not technically or operationally feasible to control.
• A site plan showing equipment placement and direction, lot lines and the distance to the nearest residence.

The City's template says a mitigation plan is required when the impact may be far-reaching in level, duration or number of residents affected, or when there is a previous permit contravention or valid complaints.

Permit Conditions, Including the 85 dBA Limit

A standard exemption permit carries these conditions (§ 591-3.2D):

• Post a notice of the permit in a visible location 7 days before the work starts.
• Follow the noise mitigation plan, if one was required.
• Pay for City staff to monitor sound levels, if required.
• Keep sound from any equipment at or below 85 dBA or 105 dBC, as a 10-minute Leq, measured 20 metres from the source. (For amplified sound, the measurement point is the lot line instead.)
• Comply with any request from a police or bylaw officer about volume when that limit is exceeded.
• Use only the equipment approved in the permit.
• Work only at the approved location.
• Work only on the approved dates and times.
• Keep a copy of the permit posted during the work, if required.

For Level 2 and 3 permits, the City can add three more conditions (§ 591-3.2F.1): distribute a notice to everyone within 120 metres at least 7 days ahead, orient equipment as the City directs, and install sound dampeners or other noise protection equipment the City specifies.

Continuous concrete pour and large crane permits work differently (§ 591-3.2F). Only three of the standard conditions apply: posting the notice, following a mitigation plan if required, and staying at the approved location. Two conditions of their own are added: notice distributed within a 120-metre radius at least 7 days ahead, and overnight work discouraged. The 85 dBA cap is not among the conditions listed for these two permit types.

Non-compliance has consequences beyond a fine. The City can revoke the permit, and compliance with your last permit is a condition for getting the next one.

Planning a pour, a crane pick or an early start? Our Toronto team can help you prepare the mitigation plan and the engineer's statement your application may need.

What 85 dBA at 20 Metres Means on Site

Most single machines can meet the permit limit. Impact-type equipment often cannot. The table below uses measured reference levels from the U.S. Federal Highway Administration's Roadway Construction Noise Model, converted from 15 m (50 ft) to 20 m.

Read these as screening values, not predictions for your site. Three things move the real number:

• Averaging. The permit limit is a 10-minute Leq, not a maximum. Equipment that runs in bursts averages lower than its Lmax; equipment that runs steadily approaches it.
• Adding sources. Two equal sources at the same distance add 3 dB. Two machines at 82 dBA each make 85 dBA together.
• The site itself. Reflections from nearby buildings and hard ground can add several decibels in dense urban lots.

The limit is set in both A-weighted (dBA) and C-weighted (dBC) terms. The dBC limit catches low-frequency noise that A-weighting discounts; see the difference between dB and dBA.

One more point: 20 metres from the source is a measurement convention, not a buffer. On a tight downtown lot, the nearest window may be much closer than 20 metres.

Not the Same 85 dBA as the Worker Exposure Limit

Ontario has a second 85 dBA rule, and the two are often confused.

A site can comply with one and fail the other. A crew working beside a concrete saw all day can exceed its exposure limit while the permit condition 20 metres away is met. Employer obligations on the worker side are covered in our guide to occupational noise regulations in Canada.

Work That Needs No Exemption Permit

Section 591-3.1 exempts five categories outright:

• Bells and sirens for public safety, including police, fire and paramedic services, and bells or whistles used by rail or transit services.
• Measures taken for the immediate health, safety or welfare of people in an emergency.
• Emergency work requiring immediate action to build, preserve, restore or demolish a highway.
• Government work.
• Waste collection.

Government work means construction, rehabilitation or maintenance work conducted by the City, the Province of Ontario, the Government of Canada, or any of their agencies or agents, including the vehicles and equipment engaged in that work.

The test is who conducts the work, not who pays for it. A private development that receives public funding is not government work by that fact alone. Utilities are not named in the exemption either.

If you are a contractor relying on this exemption, get written confirmation from the government body you work for that you act as its agent, and keep it on site. When in doubt, confirm with ML&S before scheduling night work.

Exempt from the bylaw does not mean unregulated. Provincial transit and infrastructure projects usually set noise limits in their contracts instead. Some Metrolinx projects we have supported set daytime limits at residences of 75 dBA (LAeq over 16 hours) or the ambient level plus 5 dBA, which makes pre-construction baseline measurements decisive. Our construction noise management plan guide explains why.

Enforcement and Penalties

How Complaints Are Handled

Residents report construction noise through 311 or online. The City prioritizes persistent and recurring problems, and may not investigate isolated or infrequent complaints. Bylaw officers are not emergency responders and cannot immediately stop a noise event.

Outcomes range from education and mediation to tickets, court summonses and orders. Where a sound level matters, officers measure at a point of reception: typically where the complainant would reasonably spend time, such as a backyard or patio near the façade at 1.5 m, an open balcony, or indoors.

What It Costs

The special fine deserves attention on large projects. Schedule gained by working outside permitted hours can be valued, and the court can fine that value.

Other Consequences

• Orders to comply: an officer can order the contravening activity to stop or require work to correct it (§ 591-4.3).
• Permit revocation: the City can revoke an exemption permit, with or without notice, for any breach of its conditions.
• Future permits: compliance with your last permit is a condition for the next one, and outstanding noise fines block issuance.
• Public record: every exemption permit issued since January 1, 2024 is published on the City's Open Data portal.

Construction Vibration: Chapter 363

Toronto regulates construction vibration with hard numeric limits, through the building permit process rather than the noise bylaw. Article 5 of Chapter 363 prohibits construction vibration above these peak particle velocities (PPV):

Where a professional engineer's report sets lower limits for the site, those lower limits become the prohibited levels.

People can feel vibration far below these limits, so a site can be compliant and still draw complaints. Our plain-language guide to Article 5 covers how that plays out and where projects get caught.

What the Building Permit Requires

• Vibration control form. Every building permit application must say whether the work includes blasting, deep foundations, drilled caissons, large-scale soil compaction, work within the water table, or other methods that could affect structures off site.
• Preliminary study. If it does, a professional engineer must identify the zone of influence: the area where PPV is predicted at 5 mm/s or more, or larger where site conditions warrant. Heritage-designated buildings in that zone must be identified.
• If the zone extends past the property line: a public pre-construction consultation with owners and occupants in the zone, plus an engineer's report covering background vibration measurements, pre-construction inspections of adjacent buildings, mitigation measures and a monitoring program.
• Monitoring. At least one on-site seismograph must run continuously during the activities identified. All measurements go to the building inspector at the end of each workday, or as requested. See how construction vibration monitoring is planned and deployed.
• Notice. At least one week before vibration-causing work, the ward councillor and the owners and occupants in the zone must be notified.
• Complaints. When a complaint comes in, the monitoring engineer must measure immediately at the complainant's location and share the results. If the limits are exceeded, the activity must stop until mitigation brings levels back under them.

The pre-construction inspection must document existing cracks in walls, floors and exterior cladding of the first two storeys, and interior finishes below grade. That record is also your best defence against damage claims.

Vibration can reach Chapter 591 as well. Since 2024, persistent and unreasonable noise includes sound-induced vibration, such as windows rattling from low-frequency noise.

Noise Compliance Strategies That Hold Up

Before Mobilization

• Map your noise receptors. Note the nearest residences, their distance to your lot line and any heritage buildings. Distance to the nearest residence affects your permit level, and heritage buildings affect your vibration study.
• Predict the loud phases. Demolition, shoring and piling, excavation and concrete work are where the 85 dBA permit limit and the Chapter 363 vibration limits are most likely to bind. Know which activities are at risk before you commit to a method or a schedule.
• File the vibration control form properly. Under Chapter 363 it is part of the building permit, not an afterthought.

Build a Permit Calendar

Work backwards from the date of any after-hours pour, crane pick or early start:

• At least 28 days before: submit the application to avoid the late fee.
• During review: allow for screening and the councillor notice: up to 14 days for Level 1 or 2, and an explicit no-objection for Level 3.
• Before issuance: pay any City monitoring fees.
• 7 days before: post the permit notice on site, and distribute the 120-metre notice if your permit requires it.

For a Level 3 application, five to six weeks is a realistic minimum. For a project that will need repeated permits, a working relationship with the ward councillor's office is part of the schedule.

Mitigate Noise at the Source First

The City's mitigation plan template and the Level 2 and 3 permit conditions point to the same measures:

• Equipment rated at lower noise levels, and quieter methods where the geotechnical design allows.
• Placement and orientation of noisy equipment away from homes. The City can impose orientation as a permit condition.
• Noise barriers, shields or absorptive mats around the noisiest activities. The City can require noise protection equipment as a condition.
• Broadband ("white noise") reversing alarms on vehicles.
• The noisiest work kept away from early mornings and late evenings.

Temporary barriers only work when they break the line of sight to the receptor, have enough mass to block sound, are sealed at every joint and cover the activity fully. Soft dB's temporary construction noise barriers are modular and can be moved as work progresses.

Monitor Continuously

Noise levels shift daily with equipment, methods and weather. Continuous monitoring with a station such as the Watch noise and vibration monitoring station gives you three things:

• Real-time alerts before a 10-minute Leq approaches 85 dBA, or before vibration approaches your Chapter 363 limit.
• A time-stamped record to answer complaints with data rather than opinion.
• Evidence of compliance when you apply for your next permit.

For a single permit or a short campaign, monitoring equipment can be rented. Under Chapter 363, continuous vibration monitoring is mandatory whenever the zone of influence extends off site.

Manage the Community Side

The City's mitigation plan template asks applicants to name a responsible person who monitors sound levels, enforces start and stop times, responds to complaints on site and has the authority to stop or reduce noise. Name that person whether or not a plan is required, and publish a contact number with your notices.

Noise is a health issue as well as a nuisance. The City cites effects on cardiovascular health, sleep, cognitive function and mental well-being. Prompt answers keep a single complaint from becoming a pattern, and a complaint pattern is exactly what the City weighs when it screens your next permit.

How Soft dB's Acoustical Consulting Team Can Help

Soft dB's Toronto team, led by Pascal Everton, P.Eng., works with GTA contractors and developers at each stage:

• Noise and vibration predictions to choose methods and plan permits.
• Noise mitigation plans and engineer-certified statements for exemption applications.
• Chapter 363 vibration studies, zone-of-influence assessments and monitoring programs.
• Continuous noise and vibration monitoring with real-time alerts and compliance reporting.
• Temporary noise barriers and acoustic enclosures.

Learn more about our acoustics and vibration consulting in Ontario, or how we build a construction noise management plan.

Planning after-hours work or a vibration-sensitive excavation?

Key Questions About Toronto's Construction Noise Bylaw

Sources

Primary sources, checked October 2026.

• City of Toronto, Municipal Code Chapter 591, Noise (consolidated to November 14, 2024)
• City of Toronto, Municipal Code Chapter 363, Building Construction and Demolition (consolidated to March 22, 2024)
• City of Toronto, Noise: Bylaw Enforcement and Fines (updated September 18, 2026)
• City of Toronto, Noise Exemption Permits (updated January 2, 2026)
• City of Toronto, Noise Exemption Permit Screening Criteria (June 1, 2025)
• City of Toronto, Noise Mitigation Plan Template (updated August 23, 2024)
• City of Toronto, Noise Exemption Permit Refusal Appeal, staff report to Toronto and East York Community Council (February 2, 2026)
• Government of Ontario, O. Reg. 130/20: Noise By-laws in Connection with Construction (revoked October 7, 2021)
• Government of Ontario, O. Reg. 381/15: Noise, Occupational Health and Safety Act
• U.S. Federal Highway Administration, Roadway Construction Noise Model, Table 1