What should a detailed bathroom renovation contract include to protect both me and the contractor?

A solid bathroom renovation contract should cover scope of work, payment schedule, timeline, change order process, warranty terms, and insurance requirements — and in Ontario, getting these details in writing before work begins is your single best protection against disputes. Too many GTA homeowners proceed on a handshake or a vague one-page quote and then face disagreements about what was included, what constitutes an "extra," and who is responsible when problems arise.

The scope of work is the most critical section and should be exhaustively detailed. Rather than "renovate bathroom," the contract should list every element: demolition of existing tile, vanity, toilet, and fixtures; disposal of debris; plumbing rough-in modifications (specify exactly what is being moved or added); electrical work (new GFCI outlets, exhaust fan, heated floor circuit, vanity lighting); waterproofing system and method (Schluter Kerdi, liquid membrane, etc.); tile installation with square footage and layout specified; vanity installation including countertop and sink; toilet supply and installation; shower valve, trim, and showerhead; glass enclosure supply and installation; paint; and final cleaning. Every item should note whether the material is supplied by the contractor or the homeowner — this is a common source of confusion.

The payment schedule should be tied to milestones, not calendar dates. A typical structure for a GTA bathroom renovation is 10% deposit to secure the start date, 25% at demolition completion, 25% at rough-in completion (plumbing and electrical inspected), 25% at tile and fixture completion, and 15% on final punch list completion and walkthrough. Never pay more than 10–15% upfront, and never pay the final installment until all punch list items are resolved. For a mid-range bathroom renovation in Toronto running $25,000–$35,000, this structure keeps payments proportional to completed work.

The timeline should include a start date, estimated completion date, and a clause addressing delays. Legitimate delays include permit processing times (the City of Toronto can take 2–6 weeks for plumbing permits), material backorders, and discovery of hidden conditions like mould or structural damage. The contract should specify how delays are communicated and whether the completion date adjusts accordingly.

Change Orders and Allowances

A change order process is essential because bathroom renovations frequently uncover unexpected conditions — rotted subfloor, corroded plumbing, inadequate venting, or mould behind tile. The contract should state that any work outside the original scope requires a written change order signed by both parties before the work proceeds, with the additional cost clearly stated. This protects you from surprise charges and protects the contractor from doing extra work without compensation.

Allowances are budget placeholders for items not yet selected — for example, "$1,500 allowance for tile" or "$800 allowance for vanity." The contract should clearly state what happens if you go over or under the allowance. Allowances are useful for keeping the project moving while you finalize selections, but be realistic — GTA material prices can escalate quickly once you start browsing showrooms.

Insurance, Licensing, and Warranty

The contract should require the contractor to provide proof of general liability insurance (minimum $2 million is standard in Ontario), WSIB clearance certificate confirming workplace safety coverage for all workers on site, and applicable trade licences. For bathroom renovations involving plumbing and electrical, verify that the contractor uses licensed plumbers and electricians who will obtain the required City of Toronto and ESA permits.

A warranty clause should cover workmanship for a minimum of one to two years after completion. This is separate from manufacturer warranties on products like toilets, faucets, and tile. The warranty should specify what is covered (leaks, tile cracking, grout failure, fixture defects) and the process for making a warranty claim.

Finally, include a dispute resolution clause — mediation before litigation saves both parties significant legal costs. Keep copies of all communications, change orders, and payment receipts throughout the project.