Ontario's New Air Conditioning Rule: Your Right to Install an A/C Starts July 1, 2026

Ontario summers keep getting hotter, and for years one of the most common renter questions has been a simple one: am I even allowed to put an air conditioner in my own unit? Starting July 1, 2026, the answer becomes much clearer. New rules under the Residential Tenancies Act, 2006 (RTA) give most tenants a spelled-out right to install and use a window or portable air conditioner — with some conditions attached. Here is a plain-language look at what is changing, what it asks of tenants, and what landlords can and cannot do.

Where the rule comes from

The change flows from the Helping Homebuyers, Protecting Tenants Act, 2023, which amended the RTA. The air-conditioning provisions were proclaimed to come into force on July 1, 2026. Until that date, whether you could install an A/C depended largely on your lease and your landlord's say-so. After it, the RTA itself sets out a baseline right.

This is a province-wide rule under the RTA. It is separate from the City of Toronto's bylaw about cooled common spaces in apartment buildings — that Toronto rule is about a shared amenity room, while this one is about your own unit.

The new right, in short

As of July 1, 2026, where the landlord does not already provide air conditioning, a tenant is generally permitted to install and use a window or portable air conditioner in their unit. The right does not extend to every situation — for example, it is not meant for mobile home parks or land lease communities — but for ordinary apartments and houses it gives renters a clear starting point.

The catch is that the right comes with responsibilities. It is not a blank cheque to bolt anything into any window.

What tenants have to do

If you want to rely on the new rule, plan to:

• Give written notice. Tell your landlord, in writing, before you install

the unit. Keep a copy.

• Install it safely. The air conditioner must be put in **safely and

securely**, without damaging the unit or the building, and in a way that complies with municipal property-standards by-laws and any other applicable laws.

• Cover your own costs. Generally, the cost of buying and installing the

air conditioner is yours.

• Share efficiency details if the landlord pays the power. Where the

landlord pays for the unit's electricity under your tenancy agreement, you may need to give details about the air conditioner's energy efficiency and your expected usage, so any electricity charge can be worked out fairly.

What landlords can — and cannot — do

The rule tries to balance a tenant's comfort against a landlord's legitimate concerns about safety and electricity bills.

• Rent increase for electricity (only sometimes). If the landlord pays

for the unit's electricity, they may be able to increase the rent to cover the actual or reasonably estimated cost of running the air conditioner. This applies only to units installed on or after July 1, 2026 — a landlord cannot use it to charge for an A/C a tenant has had for years. Where the tenant pays their own hydro, there is no separate A/C electricity charge, because the tenant is already paying to run it.

• Inspection rights. A landlord may inspect the unit after giving proper

written notice (in line with the RTA's entry rules) to confirm the A/C was installed safely, is not damaging the unit, and complies with applicable laws.

• No automatic veto. A landlord generally cannot simply refuse a safe,

compliant installation in a unit that has no cooling — but a tenant who installs unsafely, causes damage, or ignores municipal by-laws can still run into trouble.

A key point for both sides: the rule is about a tenant's right to install cooling. It does not force a landlord to go out and buy air conditioning where none exists.

Why this matters

For renters, this removes a lot of the old uncertainty about whether a window unit is "allowed." Used properly — written notice, safe installation, respect for by-laws — it gives you a recognized right to keep your home livable in a heat wave. For landlords, it sets out a predictable process: you can verify safety, you can recover real electricity costs in the cases the law allows, and you avoid the disputes that used to come from unclear lease terms.

As with any new rule, the details and any supporting regulations matter, and some specifics may be refined before or after the in-force date. Before you act, check the current text and guidance.

• Ontario's tenancy law: the

Residential Tenancies Act, 2006 on Ontario's e-Laws.

• The amending law: the

Helping Homebuyers, Protecting Tenants Act, 2023.

• The Landlord and Tenant Board at

tribunalsontario.ca/ltb for forms, rules, and how to raise a dispute.

Get in touch

Heat, repairs and "who pays for what" are some of the most common flashpoints between tenants and landlords. If you are unsure whether the new air-conditioning rule applies to your situation, what notice to give, or how to respond to a request, JSR Legals can help you understand your options before things escalate. Reach us at info@jsrlegals.ca.

This article is general information about Ontario law, current as of June 2026, and is not legal advice for any specific situation. Rules and their supporting regulations can change — confirm the current requirements before you act.