Wallace B. Lang Professional Corporation is a law firm serving Lambton County from offices in Petrolia and Watford, Ontario. The firm's areas of focus are real estate, wills and estates, oil and gas, and corporate law, and it offers complimentary consultations and notarization services.

Good to know

A person using a wheelchairWheelchair accessibleA calendar with a checkmark beside a clockBy appointment

Fees & payment

A clipboard with a speech bubble and a no-charge dollar coinFree consultation

Offices 2

4245 Petrolia Line, Petrolia, ON

5290 Nauvoo Road, P.O. Box 449, Watford, ON N0M 2S0

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Listing compiled from the firm’s public website in July 2026. Verify licence status in the Law Society of Ontario directory ↗