Guide

Environmental due diligence for commercial property in BC

Contamination doesn't show up in listing photos. Here's how to find it before it finds you, and what BC's rules mean for buyers, sellers, lenders and tenants.

Anyone buying, selling, financing or leasing industrial or older commercial property in BC: an old service station lot in East Vancouver, a light industrial building in Annacis Island, or a strip mall that once had a dry cleaner.

Step 1: Learn the history

Ask what the property and its neighbours were used for. Gas stations, dry cleaners, auto repair, printers and many industrial uses can leave contamination behind. The Province's site registry may show records for some sites. See Site information and the Site Registry (Government of BC).

Step 2: Order a Phase I

A Phase I consultant reviews records, aerial photos, the site and nearby properties. It doesn't usually involve sampling. Give them access early and share any reports the seller provides.

Step 3: Decide on a Phase II

If the Phase I finds potential concerns, a Phase II tests soil, groundwater and sometimes vapour. It takes longer and costs more, so build time into your subjects.

Step 4: Use the results

  • Walk away if the risk is too high.
  • Negotiate a lower price, a holdback or seller cleanup.
  • Get indemnities from a seller who can stand behind them.
  • Plan remediation with an environmental consultant and lawyer.

Tenants

Tenants can also be responsible for contamination they cause. Before you move in, document the condition with a baseline report if your use carries risk. Read the lease's environmental clause carefully.

The rules in BC

The Contaminated Sites Regulation sets standards and processes. See Contaminated Sites Regulation (BC Laws). Who pays can depend on many factors, and there are exemptions and allocation rules, so get legal advice.

Lender reliance and old reports

Ask for historical environmental reports and closure letters on day one. If you are financing, confirm whether the lender must order the Phase I so it can rely on it.

Phase II follows when Phase I flags a risk worth sampling. Contract language should allocate cost and delay.

Consultants and environmental counsel lead; keep commercial dates flexible enough for real findings.

Common mistakes

  • Skipping a Phase I to save time.
  • Relying on an old report without checking whether you can rely on it.
  • Too little time in subjects for a Phase II.
  • Indemnities from sellers with no assets.
  • Tenants with no baseline report.

Checklist

  • Past uses researched
  • Site disclosure requirements checked
  • Phase I ordered and reviewed
  • Phase II time and budget planned, if needed
  • Lender requirements confirmed
  • Contract terms on environment reviewed by a lawyer

When to get professional advice

On any industrial or older commercial property. A qualified environmental consultant and a lawyer who knows BC's contaminated sites rules are worth the cost.

Ask the seller or landlord for every environmental report they have, today. If they don't have any, that's your first answer. To talk it through, book a 15-minute call.


Related on this site: Commercial due diligence checklist

Last reviewed Oct 28, 2026. General information only, not legal, tax or financial advice. Any scenarios are hypothetical.


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General information for British Columbia only. It isn’t legal, tax, accounting or financial advice, laws and rates change, and reading it doesn’t make you my client. Any numbers or scenarios are hypothetical. Check the linked official source and talk to a lawyer, accountant or other qualified professional before you act or sign anything. See the terms and disclaimer.