Due Diligence 10 min read

Due Diligence Checklist

Don't bid blind. Use this comprehensive checklist to research properties and avoid costly mistakes before submitting your bid.

Updated March 2026
TSP Research Team

Quick Answer

Before bidding on any Canadian tax sale property you must complete 6 due diligence steps: (1) full title search — check for Crown interests, easements, and environmental liens; (2) drive-by exterior inspection — verify access, condition, and occupancy; (3) zoning verification — confirm the land is usable for your intended purpose; (4) environmental research — Phase I ESA for any former commercial/industrial site; (5) cost calculation — add land transfer tax, renovation, legal fees, and carrying costs; (6) comparable sales analysis — set your maximum bid before the sale. Tax sale properties are sold 'as is, where is' with NO interior access, NO warranties, and NO recourse after purchase.

The 6 Pillars of Due Diligence

Successful tax sale investing requires thorough research in six key areas. Skipping any of these can lead to costly surprises after you've won the bid.

1. Title Search

Ownership & Encumbrances

2. Property Inspection

Physical Condition

3. Zoning & Planning

Permitted Uses

4. Environmental

Contamination Risks

5. Financials

Costs & Arrears

6. Market Value

Comparables & ROI

Detailed Checklist

1 Title Search

Obtain a Parcel Register or detailed title search to check for:

  • Liens: Construction liens, mortgages (most are deleted, but check rules), miscellaneous assignments.
  • Easements: Utility lines, shared driveways, or access rights that affect property use.
  • Restrictive Covenants: Rules limiting what you can build or do on the land.
  • Crown Interests: Interests of the Crown (federal/provincial) usually survive tax sales.
  • Right of Way: Check for any registered rights of way that could limit development.
2 Physical Inspection (Exterior Only)

You generally cannot enter the property, but you should view it from the street and note:

  • Access: Is the property landlocked? Is there a legal road or right of way?
  • Occupancy: Is someone living there? Eviction may be required and can take months.
  • Condition: Visible damage to roof, windows, foundation, or siding?
  • Neighbourhood: Are surrounding properties well-maintained or declining?
  • Utilities: Are there visible utility connections (hydro, gas, water)?
3 Zoning & Planning

Contact the municipal planning department or check their online portal:

  • Zoning: Detailed zoning verification (e.g., Residential, Commercial, Environmental Protection).
  • Building Envelope: Are there setbacks or restrictions that make the lot unbuildable?
  • Future Plans: Are there planned road widenings or developments nearby?
  • Heritage Designation: Is the property designated as a heritage building?
  • Flood Plain: Is the property in a flood plain or conservation area?
4 Environmental Assessment

Environmental issues can be extremely costly. Check for:

  • Prior Use: Was the property previously used as a gas station, dry cleaner, or industrial site?
  • Underground Storage Tanks: Old tanks can mean soil contamination.
  • Phase 1 ESA: Consider ordering a Phase 1 Environmental Site Assessment for high-risk properties.
  • Environmental Liens: These often survive tax sales and become your liability.
5 Financials & Costs
  • Cancellation Price: Exact amount needed to clear the tax debt (your minimum bid).
  • Land Transfer Tax: Calculate the tax payable on your bid amount.
  • HST/GST: Is HST applicable to the sale? (Common for vacant land/commercial).
  • Renovation Costs: Estimate repair costs based on exterior inspection.
  • Carrying Costs: Property taxes, insurance, and utilities during the redemption period.
  • Legal Fees: Budget for a real estate lawyer to review the title and complete the transfer.
6 Market Value Assessment

Determine what the property is actually worth before you bid:

  • Comparable Sales (Comps): Find recent sales of similar properties in the area.
  • MPAC Assessment: Check the municipal property assessment for a baseline value.
  • Listing History: Has the property been listed on MLS before? At what price?
  • After Repair Value (ARV): What will the property be worth after renovations?
  • ROI Calculation: Factor in all costs to determine your maximum profitable bid.

Pro Tip: Build a Bid Budget

Your maximum bid = After Repair Value − Renovation Costs − Carrying Costs − Profit Margin. Never bid above this number, no matter how attractive the property seems.

Before You Submit Your Bid

Run through this final checklist before submitting your bid:

  • Title search completed and reviewed by a lawyer
  • Property viewed in person (exterior)
  • Zoning confirmed with the municipality
  • Environmental concerns investigated
  • All costs calculated (taxes, legal, renovation, carrying)
  • Comparable sales reviewed and ARV determined
  • Maximum bid calculated and written down
  • Deposit funds available (typically 20% of bid)

Ready to Start Your Research?

Use our digital due diligence tool to track your research for each property and never miss a step.

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