The contract is where the promise meets reality. Here is what every clause should say — and what missing clauses cost you when things go sideways.
Most Toronto homeowners focus their energy on the estimate. Is the price fair? Does it match the scope? Those are reasonable questions, but the quote is only a number. The contract is the document that determines what actually happens when the demolition uncovers a surprise, when the tile you selected is back-ordered, when the project runs two weeks long, or when the finished work does not match what was described in the proposal.
In 25 years of renovation work in Toronto, the disputes we have seen — between homeowners and other contractors, and occasionally involving our own projects — almost never come down to bad intentions. They come down to ambiguity. One party assumed something was included; the other assumed it was not. One party thought a delay was acceptable; the other expected the original schedule to be honoured. A well-written contract eliminates almost all of that ambiguity before work begins, so both parties know exactly what was agreed and what happens when circumstances change.
Ontario's Construction Act governs major aspects of renovation contracts in this province, including statutory holdbacks, lien rights, and payment timelines. But the Act sets a floor, not a ceiling. The best contracts go significantly further, and the difference between a thorough contract and a thin one is often where disputes originate.
This guide covers every clause that should appear in a Toronto renovation contract, what each one should say, and what its absence means in practice.
The scope of work is the foundation of everything else in the contract. It defines what the contractor has agreed to build, and by extension, what they have not agreed to build. A vague scope of work is the single most common source of renovation disputes, and it almost always disadvantages the homeowner, not the contractor.
A properly written scope should be specific enough that a different contractor, reading it cold, could reproduce the work without needing to interpret anything. That means:
When you receive a contract with a scope that reads like a summary paragraph rather than a detailed description, ask for a revision before you sign. The extra day it takes to get a proper scope written is far less expensive than the arguments that arise from an incomplete one.
How and when you pay your contractor shapes the power dynamic of the entire project. A front-loaded payment schedule leaves you with little leverage if work stalls or quality problems emerge. A milestone-based schedule keeps both parties accountable throughout.
For a mid-size Toronto renovation — say, a kitchen and main-floor reconfiguration in the $150,000–$250,000 range — a typical milestone-based payment schedule might look like this:
| Milestone | Typical Payment | Notes |
|---|---|---|
| Contract signing / deposit | 10–15% | Covers mobilization, permit fees, initial material orders |
| Demolition complete & rough-in underway | 20–25% | Site is open; structural and systems work visible for inspection |
| Rough-in complete, inspected & approved | 20–25% | All in-wall work done; insulation and vapour barrier in place |
| Drywall complete, finishes underway | 20–25% | Major trade work done; project entering finish phase |
| Substantial completion | Balance less 10% holdback | All major work done; deficiency list issued |
| Deficiencies resolved & final sign-off | 10% holdback | Released after deficiency list is fully addressed |
Under Ontario's Construction Act, owners on contracts above a certain threshold are required to retain 10% of the value of services and materials supplied as a statutory holdback. This holdback can be used to satisfy liens filed against the property by subcontractors or suppliers who have not been paid by the general contractor. Even on smaller projects where the Act does not technically mandate it, withholding a 10% holdback until all deficiencies are resolved is strongly advisable — it is your most effective tool for ensuring the contractor returns promptly to finish the job properly.
The contract should specify exactly what triggers the release of the holdback, how deficiencies will be documented, and what the timeline is for their resolution. "Substantial completion" is the standard legal trigger for the holdback clock to start, but what constitutes substantial completion should be defined in the contract rather than left to interpretation.
Watch for front-loaded payment schedules. Any contract that asks for more than 15–20% upfront before work begins should raise questions. Contractors with established supplier relationships and good credit do not need to float your project on your deposit. Large upfront payments shift risk entirely to you and give the contractor less incentive to maintain momentum.
Change orders are modifications to the original scope of work. They arise constantly on Toronto renovation projects — particularly in older homes built between 1890 and 1960, where what is behind the walls rarely matches what the drawings assume. Knob-and-tube wiring that needs replacement, unexpected load-bearing walls, rot in floor joists, undersized drain stacks that need upsizing to meet current code: all of these are legitimate discoveries that require additional work and additional cost.
The problem is not that change orders happen. The problem is when they are handled informally. A contractor who says "don't worry, we'll sort it out at the end" is setting up a negotiation you do not want to have once the walls are closed and your leverage is gone. A properly drafted change order clause should specify:
A start date and a target completion date should appear in the contract. So should provisions for what happens when those dates are not met. Renovation timelines are inherently uncertain — permit approvals, material lead times, and weather all introduce variability — but uncertainty is different from no accountability at all.
To calibrate what you should expect, here are typical durations for common project types in Toronto. These are working-day estimates from permit issuance through substantial completion:
| Project Type | Typical Duration | Key Variables |
|---|---|---|
| Bathroom renovation (mid-size) | 4–6 weeks | Custom tile, fixture lead times, plumbing moves |
| Kitchen renovation (full gut) | 8–12 weeks | Cabinet lead times (8–14 weeks for custom), appliance delivery |
| Basement finish | 8–14 weeks | Permit timeline, waterproofing, egress window requirements |
| Main-floor reconfiguration | 10–16 weeks | Structural review, permit, HVAC relocation |
| Second-storey addition | 20–30 weeks | Design & permit lead time (12–20 weeks), structural complexity |
| Full-home renovation | 6–14 months | Phasing, occupancy requirements, permit complexity |
The contract should distinguish between excusable delays (permit holdups, material back-orders outside the contractor's control) and non-excusable delays (the contractor took on too many jobs, poor scheduling, subcontractor management failures). Excusable delays typically extend the completion date without penalty. Non-excusable delays should carry some consequence — even if that consequence is simply a formal acknowledgment and a revised schedule rather than a financial penalty, having a process matters.
This section of the contract is where many homeowners skip to the signature line. Do not. The insurance and liability provisions determine who bears the financial consequences if someone gets hurt on your property or if the work causes damage.
Your contract should confirm, and you should verify independently with certificates of insurance:
On subcontractor lien exposure: In Ontario, even if you pay your general contractor in full, a subcontractor or material supplier that was not paid by the GC can file a lien against your property. This is why the statutory holdback exists, and why you should request a statutory declaration from the GC at each draw confirming that all subcontractors and suppliers have been paid to date. Do not release payment draws without one.
Ontario's Ontario New Home Warranties Plan Act (Tarion) applies to new home construction, not to renovations. For renovation work, warranty terms are entirely contractual — which means whatever your contract says is what you get. A contractor who offers no written warranty is not obligated to return to fix defects that appear six months after completion.
A reasonable renovation contract warranty should include:
No one signs a renovation contract expecting to need the dispute resolution clause. But having one — and having one that is specific — matters if things go wrong. The alternative is litigation, which is expensive, slow, and often disproportionate to the dollar value of the dispute.
Most renovation contracts in Ontario should include a stepped dispute resolution process: first, direct negotiation between the parties; second, mediation if negotiation fails; third, arbitration or litigation as a last resort. For disputes below a certain dollar value — typically $35,000 — the Small Claims Court process in Ontario is a practical option that does not require a lawyer. The contract can specify this as the forum for lower-value disputes.
The contract should also specify which party bears legal costs if a dispute proceeds to formal proceedings, and whether the prevailing party is entitled to recover costs. Ontario courts have discretion on costs, but contractual cost provisions can influence how that discretion is exercised.
Beyond what a good contract includes, there are provisions that appear in problematic contracts — language that shifts risk to the homeowner in ways that are not obvious on first reading:
Before you sign a renovation contract in Toronto, work through this checklist. If the answer to any of these questions is unclear or the answer is no, ask for a revision before signing — not after:
At Kopman Build, our standard contract runs to twelve to fifteen pages for a typical mid-size renovation. We use it not because we expect disputes, but because we have seen what happens when there are no shared expectations in writing. A detailed contract protects both parties equally — it is as useful to us when a client changes their mind about scope mid-project as it is to a homeowner when a delay needs to be explained and documented.
The contractors who resist detailed contracts are almost always the ones who want flexibility to interpret the project in their favour as it unfolds. That flexibility comes entirely at your expense. If a contractor presents you with a two-paragraph proposal and calls it a contract, ask for something more comprehensive. If they cannot or will not provide it, that tells you exactly what you need to know about how they will manage your project when things get complicated.
We have been doing renovation work in Toronto since 1999, and the projects that go smoothly are not the ones where nothing went wrong — something always goes wrong. They are the ones where the contract was clear enough that both parties knew how to handle it when it did. If you are planning a renovation and want to see what a thorough contract looks like, or want to talk through a contract you have already received, reach out for a no-obligation conversation.
Kopman Build serves Toronto, the GTA, and Muskoka. No-obligation consultations — we come to you.
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