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Find a business in Oshawa

Explore local businesses by category or name.

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Browsing is free. Nothing is sent to a business until you choose to contact one.

Businesses in Oshawa

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This selection shows 200 businesses. Owner-claimed first, then profiles with more recorded details.

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Useful details before you choose

What does the count on this Oshawa page mean?
This selection shows 200 businesses. It does not include every business. Alphabetical browsing uses separate live listings and can have different coverage.
How are listings ordered?
Owner-claimed listings come first, then profile completeness and name. Sponsored placements are labelled and do not change the organic order.
Does a listing mean NSO endorses a business?
No. Check that the business offers what you need. Ask about relevant qualifications, insurance and licensing, and confirm those details with the business or issuing organisation.
How do I compare options?
Read the recorded business details, ask about availability and request a quote for your actual requirements. Confirm the scope and price before booking.
What if a business is missing or its details are wrong?
Use Add a missing business or Claim an existing listing. These are reviewed requests; they do not automatically publish a record or verify ownership.

Oshawa Homeowner Resources

Official municipal links for permits, bylaws, and services

City Hall

City of Oshawa

905-436-3311

Building Permits

Apply for a Permit

905-436-3311

Better Business Bureau

Check BBB Ratings

416-644-4936

Electricity

Property Tax

Tax Information

Ontario Contractor Verification

Verify licences, insurance, and credentials before hiring

WSIB Clearance

Verify Contractor Coverage

1-800-387-0750

Electrical Safety (ESA)

Verify Electrician Licence

1-877-372-7233

HVAC/Gas (TSSA)

Verify HVAC Licence

1-877-682-8772

Consumer Protection

File a Complaint

1-800-889-9768

What to Book This Season

September — November in Oshawa

Furnace tune-upWindow/door replacementInsulation upgradesEavestrough guardsDriveway sealingWeatherproofing

Fall is the sweet spot — contractors are less busy, prices drop, and you prepare for winter.

Before You Hire a Contractor in Oshawa

  • Get at least 3 written quotes for comparison
  • Verify WSIB clearance certificate (protects YOU from liability)
  • Check Google reviews AND ask for local references
  • Confirm they will pull all required permits
  • Never pay more than 10-15% deposit upfront
  • Get everything in writing — scope, timeline, payment schedule
  • Verify their business insurance is current
  • For regulated trades (electrical, plumbing, gas), verify their license number

Ontario law: Ontario's Construction Act provides a 10% holdback right on construction projects. Learn more

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