Renovating a property in Toronto is allowed, but most projects need one or more approvals before any work begins. Depending on what you are changing and where the property sits, you may need a building permit, a minor variance, heritage consent, a tree permit, or a rental renovation licence, and missing any one of them can stop your project.
The cost of getting this wrong is real. The City can order you to stop work, charge roughly double the normal permit fee for work already started, and in some cases require you to remove finished construction. Unpermitted work also resurfaces when you sell, because a buyer’s lawyer will ask for permits that do not exist. This guide explains the approvals that apply to Toronto renovations, what each one costs and how long it takes, the mistakes we see most often in our real estate practice, and where a lawyer fits in.
Do you need a building permit to renovate in Toronto?
The short answer is that structural and systems work needs a permit, and cosmetic work usually does not. The Building Code Act, 1992 and the Ontario Building Code set the rules, and Toronto Building issues the permits.
You generally need a building permit to build an addition, change the footprint of the house, add or move a wall that carries load, finish a basement, add or relocate plumbing or wiring, build a deck above a set height, or change how a space is used. You generally do not need one to paint, replace flooring, swap cabinets, or change a fixture for the same kind of fixture.
Fees are calculated on the area of the work by occupancy type, with a minimum building permit fee of $214.79 in 2026. If your project needs a zoning review, the Zoning Applicable Law Certificate costs 25 percent of the building permit fee. Heating, plumbing, and air conditioning permits are charged separately. These are City figures current for 2026, so confirm the amounts before you budget.
On timing, Toronto Building aims to complete a first review of a house application within about 10 business days, but a complete file from application to permit in hand commonly takes several weeks once drawings, engineering, and zoning are all in order.
Skipping the permit is the costliest shortcut. The City can issue an order to stop work, charge roughly double the permit fee for work already underway, and require you to open up or remove what was built. The takeaway is simple. Confirm the permit question in writing before anyone picks up a tool.
What approvals might your renovation need beyond a building permit?
A building permit is often only one of several approvals. The table below maps common projects to the approval each one usually triggers, who issues it, and a rough timeline. Use it as a planning guide, not a guarantee, because the right answer depends on your specific property and scope.
| What you are doing | Approval or step | Who issues it | Rough timing |
|---|---|---|---|
| Painting, flooring, cabinets, swapping a fixture for the same kind | Usually no permit | Not applicable | Start when ready |
| Addition, structural change, new plumbing or wiring, finished basement | Building permit | Toronto Building | First review about 10 business days, total often several weeks |
| Design exceeds a zoning limit such as setback, height, or lot coverage | Minor variance | Committee of Adjustment | About 3 to 4 months |
| Property is designated heritage or sits in a heritage conservation district | Heritage consent or district permit | City Council or delegated staff | Council decides within 90 days |
| Removing or harming a private tree 30 cm or wider | Tree permit with arborist report | Urban Forestry | Allow several weeks |
| Work needs a tenant to move out | Rental renovation licence | Chief Building Official | Apply within 7 days of the N13 notice |
What happens if your plans do not fit the zoning bylaw?
Toronto Zoning Bylaw 569-2013 controls how a building can sit on its lot, including setbacks from property lines, height, lot coverage, and floor space index. If your design stays inside those limits, your permit can proceed. If it exceeds even one, you need relief before the permit will issue.
That relief is a minor variance, decided by the Committee of Adjustment under Ontario’s Planning Act. The committee weighs four questions. Does the change keep the general intent of the official plan. Does it keep the general intent of the zoning bylaw. Is it desirable for the use of the land. Is it minor. All four need to point the same way.
In 2026 the City’s application fee for a minor variance on additions or alterations to a house of three units or fewer is about $2,228, and a new dwelling of three units or fewer is about $5,011. Plan for roughly three to four months once you add the public notice and hearing. If a neighbour objects, expect longer. You can read more in our guide to Toronto zoning bylaws.
The practical takeaway is to check zoning before you settle on a design. Reworking drawings to fit the bylaw is far cheaper than a hearing.
What if your home is a heritage property or in a heritage conservation district?
Toronto protects a large number of properties under the Ontario Heritage Act, and the rules differ depending on the level of protection. The distinction that matters most is between a property that is listed and one that is designated.
A designated property cannot be altered in a way that is likely to affect its heritage attributes without written consent from City Council, under section 33 of the Act. Demolishing or removing a building or a heritage attribute needs consent as well. Council has 90 days to decide once your application is complete, and if it does not decide in time it is treated as having consented. A refusal or conditions can be appealed to the Ontario Land Tribunal.
A listed property that is not yet designated is lighter. You do not need a heritage permit to alter it, but you must give the City 60 days written notice before any demolition. Properties inside a heritage conservation district need a separate district permit for exterior changes.
Here is the trap that catches buyers. The moment the City issues a notice of intention to designate, any existing building or demolition permit on that property becomes void, and your planned work suddenly needs council consent. If you are buying a property to renovate, check the heritage register and confirm the property’s status before you close, not after. A real estate lawyer can pull this as part of the title and due diligence review.
Do you need a permit to remove a tree for your renovation?
Often, yes. Toronto’s private tree bylaw, Chapter 813 of the Municipal Code, requires a permit before you injure, destroy, or remove any tree on private property that measures 30 cm or more in diameter at 1.4 metres above the ground. The rule applies regardless of the species and whether the tree is healthy or dead.
A permit application usually needs an arborist report, and approval often comes with a condition to plant replacement trees. The penalty for skipping it is severe. The City’s tree protection rules carry a maximum fine of $100,000 for each tree destroyed. If your property backs onto a ravine, the Ravine and Natural Feature Protection Bylaw adds another layer, with no minimum size for protection in regulated areas.
The takeaway is to identify protected trees during design, not during demolition. A mature tree near your addition can force the foundation to move, because the City protects the root zone, not only the trunk.
Are you renovating a property that has tenants?
This is the newest rule and the one investors miss. Since July 31, 2025, Toronto’s Rental Renovation Licence Bylaw, Chapter 662 of the Municipal Code, requires a landlord to hold a rental renovation licence before starting work that needs a tenant to move out.
If the renovation requires vacant possession and you serve an N13 notice to end the tenancy under the Residential Tenancies Act, you must apply for the licence within 7 days of delivering that notice, and the work cannot begin until the Chief Building Official issues it. A licensed engineer or architect has to confirm that the unit truly must be empty for the work. Cosmetic updates such as painting do not qualify.
You also have to offer affected tenants compensation or alternative accommodation and the right to return at the same or a comparable rent once the work is done. The licence fee is about $700 per unit in 2026, and the fines for getting it wrong run into the tens of thousands of dollars and higher. If you are buying a tenanted property to renovate, factor this into your timeline and budget before you make the offer.
How does your renovation contract protect you, and what is the 10 percent holdback?
Put the deal in writing. A clear contract that sets out the scope, the price, the schedule, and the payment terms is your best protection if the relationship with the contractor sours. A handshake leaves you with nothing to point to when the work and the bill stop matching.
Ontario’s Construction Act adds a protection that many homeowners do not know about. As the owner you are required to hold back 10 percent of each payment to your contractor. The reason is that subcontractors and suppliers can register a lien against the title to your home if they are not paid, even if you already paid your general contractor in full. Without the holdback, you can end up paying twice. With it, your exposure is capped.
Timing matters. A lien must be preserved within 60 days and then perfected within 90 days, measured from substantial completion of the contract. New rules that took effect on January 1, 2026 changed how holdback is released on projects that run longer than a year, but those two deadlines for liens did not change. Keep the dates on your calendar and do not release the final money early.
Have a lawyer review the construction contract before you sign, especially on larger projects. We can flag payment terms, holdback handling, and the dispute steps that protect you. A real estate lawyer can also coordinate this with your purchase if you are buying the property to renovate.
The renovation mistakes we see most often
In our real estate practice, the same avoidable problems come up again and again. Here are the ones that cost clients the most.
- Starting work before the permit is issued. The City can order the work stopped, charge about double the permit fee, and require parts to be rebuilt to code.
- Paying the contractor in full and skipping the 10 percent holdback. If a subcontractor is not paid, a lien can land on your title and you may pay twice.
- Not checking zoning or the heritage register before buying a property to renovate. The renovation you pictured may not be approvable on that lot.
- Removing a mature tree without a permit. Fines reach up to $100,000 per tree, plus forced replanting.
- Relying on a verbal agreement. With no written scope, price, or schedule, disputes become your word against the contractor’s.
- Serving an N13 to renovate a tenanted unit without the rental renovation licence. The project stalls and the fines are steep.
“Renovation problems may not always start on the construction site. They can start before closing, when nobody checked whether the work was even allowed on that property.”
How a real estate lawyer fits into a Toronto renovation
A lawyer is not only for disputes. The most useful time to involve one is early, before you buy and before you sign with a contractor. We review the agreement of purchase and sale and the title when you are buying a property to renovate, check zoning and heritage constraints that could block your plans, review the construction contract, and advise on holdback and lien risk. If a dispute does arise, we help you understand your options.
Insight Law Professional Corporation works with clients in real estate, business, and estate matters across Ontario, in person and virtually, from offices in Toronto and Ottawa, with service in English and Turkish. If you have questions about a renovation or a purchase, contact us or book a free 15 minute consultation.
A legal checklist before you renovate
- Confirm whether the project needs a building permit, in writing.
- Check Toronto Zoning Bylaw 569-2013 for setback, height, lot coverage, and floor space index limits, and budget for a minor variance if you exceed them.
- Search the heritage register for designation, a heritage conservation district, or a notice of intention to designate.
- Identify any tree 30 cm or wider and get an arborist report early.
- If a tenant must move out, plan the rental renovation licence and the N13 timing together.
- Get the contract in writing with scope, price, schedule, and payment terms.
- Hold back 10 percent and diarize the lien deadlines of 60 and 90 days.
- Confirm your home insurer covers the renovation and the added risk during construction.
Frequently asked questions
Do I need a permit to finish my basement in Toronto?
Usually yes. Finishing a basement typically involves new walls, a bathroom, or changes to plumbing and wiring, all of which need a building permit. Purely cosmetic work in an already finished basement, such as paint and flooring, generally does not. When the line is unclear, confirm with Toronto Building before you start.
How long does a building permit take in Toronto?
Toronto Building targets a first review of a house application within about 10 business days, but the realistic time from a complete application to a permit in hand is often several weeks once drawings and engineering are finalized. If your project needs a minor variance, add roughly three to four months for the Committee of Adjustment process.
Can I renovate a heritage house in Toronto?
Yes. Designation does not freeze a property, but if it is designated you need written consent from City Council for any change likely to affect its heritage attributes, under section 33 of the Ontario Heritage Act. The process is meant to be cooperative, and council decides within 90 days of a complete application. Check the property’s heritage status before you buy, because it shapes what you can do.
What is the 10 percent holdback and do I have to keep it?
Yes. Ontario’s Construction Act requires the owner of a project to hold back 10 percent of each payment to the contractor. The holdback protects you against liens from subcontractors and suppliers who go unpaid, which can otherwise force you to pay twice. Release it only after the lien deadlines have passed.
What happens if I renovate without a permit?
The City can issue an order to stop work, charge roughly double the normal permit fee for work already done, and require you to expose or remove construction so it can be inspected. The problem also follows you to resale, when a buyer’s lawyer asks for permits and closing stalls. The savings from skipping a permit rarely survive the consequences.
Do I need a licence to renovate a unit my tenant lives in?
If the work needs the unit to be vacant and you serve an N13 notice to end the tenancy, then yes. Toronto’s Rental Renovation Licence Bylaw requires you to apply within 7 days of delivering the N13, and you cannot start until the Chief Building Official issues the licence. Routine repairs that do not require the tenant to leave are not covered.
The information provided above is of a general nature and should not be considered legal advice. Every transaction or circumstance is unique, and obtaining specific legal advice is necessary to address your particular requirements. Therefore, if you have any legal questions, it is recommended that you consult with a lawyer.
