City of Ottawa protective plumbing rebate: who qualifies, what it pays, and the steps
Updated
A plain guide to the City of Ottawa's Residential Protective Plumbing Program: eligible homes, rebate amounts by device as published in 2026, the permit, and the paperwork.
What the program is
The City of Ottawa runs the Residential Protective Plumbing Program to help owners of older homes add flood protection. It pays a rebate toward backwater valves, sump pumps and some related plumbing work, plus the cost of the building permit.
The program has changed several times over the years, and the City can change it again. Treat everything below as a guide to the 2026 version. Confirm the current rules on ottawa.ca, or by calling 3-1-1, before you book any work.
Who qualifies
The home has to be served by City of Ottawa sewers. Homes on a private septic system are not part of this program.
Age matters, and it depends on the sewer. For work on the storm side, meaning a storm backwater valve, a sump pump or a storm lateral, the home must have been built before January 1, 2004. For a sanitary backwater valve, the home must have been built before January 1, 2012.
The rebate is for new protection. Replacing a valve or pump you already have does not qualify.
Newer homes are more likely to have valves already. If you are not sure, a plumber can check the floor drain and cleanout area, or run a camera down the line.
What it pays in 2026
Published amounts in 2026 are:
Sanitary backwater valve, interior: up to $1,000.
Storm backwater valve: up to $1,000 inside, or up to $2,500 outside.
Sump pump with battery backup in an existing pit: up to $1,500. With a new pit: up to $3,000.
Private storm lateral installation: up to $3,000.
Building permit: 100% of the permit cost.
These are maximums. Actual installed costs are often higher than the rebate, especially where a floor has to be cut and restored. Indicative 2026 Ottawa ranges before any rebate are about $1,800 to $4,500 for an interior backwater valve retrofit and $1,500 to $3,500 for a new sump pit and pump.
The steps
Check eligibility first. Confirm your home's build date and that it is on City sewers.
Hire a licensed plumber. Get a written quote that names each device and where it goes.
Get the building permit before any work starts. This is not optional. Work done without a permit puts the rebate at risk, and the permit brings a City inspection that confirms the device was installed properly.
Check what the City wants before work begins. The application process has been simplified over the years, and the current version sets out what you submit and when. Read it on the program page so you do not miss a step.
Have the work done and pass the inspection.
Send in the paperwork. Expect to provide the paid plumber's invoice, proof of payment, the permit and the passed inspection. Keep copies of everything.
Tips from the field
Book early in the year if you can. Spring is when basements flood and when plumbers are busiest.
Ask whether your foundation drains are connected to the sanitary sewer. In older neighbourhoods such as parts of Nepean, that setup is common and changes what protection makes sense.
A sanitary backwater valve means you should not run water in the house when the sewer is backed up, since the closed valve holds your own drain water in. Ask the plumber to show you how the valve works and how to clean it.
Plan for upkeep. Valves need a yearly check and cleaning, and sump pumps and batteries have a service life. Write the install date on the equipment.
Tell your insurer once the work is done and send them the invoice and permit. Some insurers take it into account.
Working out what you will actually pay
Take the plumber's quote and subtract the rebate for each device, up to its maximum. Add back HST, since the quote is usually before tax. The permit fee is covered in full, so it drops out.
Here is an example using the indicative 2026 ranges. An interior sanitary valve quoted at $2,800 would leave about $1,800 to pay after a $1,000 rebate, plus tax. A new sump pit with pump and battery backup quoted at $3,200 would leave about $200 after a $3,000 rebate, plus tax.
You pay the plumber first and the City pays you later. Plan your cash flow for that gap.
Get more than one quote. Ask each plumber to price the same devices so you can compare them fairly, and ask whether floor restoration is included.