Kitchen and bathroom renovation failures are among the most financially and emotionally painful home improvement experiences — because these are the rooms you live in most intimately, because the costs are high, and because failures like waterproofing defects can cause cascading damage that exceeds the original renovation cost. Here’s what to do when a kitchen or bathroom renovation goes wrong.

“The homeowners who get the best outcomes after a failed renovation are the ones who documented everything — photos of the demolition findings, copies of every change order, records of every communication. The ones who struggle are the ones who paid in cash, have no contract, and accepted verbal promises about what would be done. Documentation is the difference.”

— Marcus Chu, renovation cost consultant and project manager with 14 years of experience reviewing and managing residential kitchen and bathroom renovation budgets in the local area

Step 1: Stop Making Payments if Work Is Incomplete or Deficient

brown wooden table with chairs

If significant deficiencies are discovered before final payment, withhold the remaining balance until the issues are documented and a remediation plan is agreed. This is your primary leverage. Once the final payment is made, your practical ability to compel remediation drops significantly.

Step 2: Document Everything

Before contacting anyone, document all problems thoroughly:

  • Photographs of every deficiency — tiles that are cracking or popping, cabinet doors that won’t align, countertop seams that are opening, visible mold behind tile if accessible, water staining below a bathroom
  • Written description of each issue — what it is, where it is, when you first noticed it
  • All documents from the project — the original quote, the contract, change orders, invoices, warranty documents, all written communications

For waterproofing failures specifically — any sign of water infiltration behind tile (mold smell, soft spots in the floor, staining at the base of walls) is a serious problem that requires immediate documentation and professional assessment.

Step 3: Contact the Contractor in Writing

white ceramic sink with faucet

Send an email to the contractor listing every deficiency, with photographs attached. Request:

  • An inspection of the identified deficiencies within 5 business days
  • A written remediation plan for each deficiency
  • A timeline for completion of remediation

Be specific and professional. Avoid emotional language — a clear, factual description of each problem is more effective.

Step 4: Involve the Municipal Building Department for Permit Violations

If work was done without required permits — or if permits were pulled but inspections were not properly completed — contact your local building department. They can:

  • Require a retroactive permit application and inspection
  • Issue orders to comply if work doesn’t meet code
  • In serious cases, require work to be opened up for inspection

This is particularly relevant if waterproofing wasn’t done correctly, if electrical work wasn’t inspected, or if plumbing changes weren’t inspected before walls closed.

Step 5: Get an Independent Assessment

For significant failures — waterproofing defects, cabinet installation deficiencies, tile failures, structural issues — hire an independent building inspector, renovation consultant, or relevant trade professional to assess the work. Their written report:

  • Identifies the specific deficiencies
  • Establishes whether they’re workmanship failures, product failures, or design failures
  • Estimates the cost of remediation
  • Provides the objective foundation for a warranty claim or legal action

Step 6: File Complaints

Your local consumer protection office (consumerprotectionontario.Ca): For unfair business practices, failure to deliver the service as represented, or failure to honor warranty obligations.

Better Business Bureau: Creates a public record of your complaint.

The relevant licensing bodies: If licensed plumbers or electricians did deficient work, complaints can be filed with the relevant trade licensing body or your local electrical safety authority.

Step 7: Small Claims Court or Litigation

For unresolved disputes:

  • Small claims court: Disputes up to $35,000 in many regions. Accessible without a lawyer for most homeowners.
  • Superior Court: For claims above the small claims limit. A lawyer is advisable.

You’ll need: the contract, all change orders, the independent assessment report, all photographic evidence, and a clear accounting of costs incurred or to be incurred to remediate the failed work.

A Note on Incomplete Projects

If a contractor has stopped work before completion — absconded with a deposit, become unreachable, or simply abandoned the project — the steps above apply, but with the additional urgency of securing the property (particularly in a bathroom with open walls or a kitchen without functioning plumbing) and engaging a replacement contractor as quickly as possible to prevent further deterioration.

Keep all receipts from the replacement contractor’s work — those costs are damages attributable to the original contractor’s failure.

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