Basement flooding and sewer backup in Calgary

Plumbers for backwater valves, sump pumps and drains.

50 pros in Calgary

Not yet verified. We checked each one’s own website for this work, and the licence in the public register where one applies, but we haven’t contacted them yet. How a business gets listed

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What to know in Calgary

These plumbers and a restoration firm say on their own websites that they install backwater valves or sump pumps in Calgary. In Calgary a backwater valve needs a plumbing permit and must slope toward the sewer, and homes near the Bow, the Elbow or Nose Creek may be required to have one. The City doesn’t pump out flooded basements or fix sump pumps, so arranging the work falls to you.

Local facts

  • The City of Calgary says basement flooding is the homeowner’s responsibility: the City assesses the situation but does not pump water out of basements, and sump pump maintenance and seepage from a failed pump are also the owner’s.

    City of Calgary (source, opens in a new tab)

  • About 80,000 people were evacuated during Calgary’s June 2013 flood, the city’s largest since 1897. The City says private and public property was damaged by overland flooding, rising groundwater, storm water back-up and sewer back-up.

    City of Calgary (source, opens in a new tab)

Before you hire

  1. A plumbing permit is required to install a backwater valve in Calgary.

    Source: City of Calgary (source, opens in a new tab)

  2. Plumbing is a compulsory certification trade in Alberta: the work goes to a certified journeyperson or a registered apprentice.

    Source: Government of Alberta (Tradesecrets) (source, opens in a new tab)

  3. Contractors working in Calgary need a valid City business licence; without one they can’t get trade permits.

    Source: City of Calgary (source, opens in a new tab)

Questions about hiring in Calgary

How do I check a contractor’s licence in Calgary?

Contractors working in Calgary need a valid City business licence, and without one they can’t get the trade and construction permits a job may need. Ask for the licence number and check it with the City’s licensed contractor search or by calling 311. If the contractor asks for a deposit or progress payments, it must also hold a provincial prepaid contractor licence, which Service Alberta can confirm. City of Calgary (source, opens in a new tab)

What should a written contract include?

Ask for a detailed written contract before work starts. The City of Calgary’s checklist: the contractor’s business licence number, start and finish dates, plans and material specifications with warranties, who handles permits and inspections, the work schedule, the price and payment arrangements, liability insurance details, and workers’ compensation coverage or, if exempt, private disability insurance. City of Calgary (source, opens in a new tab)

How should I compare contractors?

Get detailed estimates from several contractors so you compare the same scope of work, not just the total. Ask each for a list of past jobs with contact details and actually call those clients, asking about the quality of the work as well as whether they were happy. Then check the licence, and get everything agreed in writing before any money changes hands. City of Calgary (source, opens in a new tab)

Do I need a permit for a backwater valve in Calgary?

Yes. The City of Calgary requires a plumbing permit to install a backwater valve, and it should slope down toward the municipal sewer at a grade of at least 2%. If your home is in a river flood hazard area or close to the Bow, Elbow, Nose Creek or West Nose Creek, the Land Use Bylaw may require one. Ask the plumber who will take out the permit. City of Calgary (source, opens in a new tab)