Hamilton · City of Hamilton
Basement Flooding Rebate in Hamilton
Up to $2,000 for Hamilton homeowners through the City of Hamilton Protective Plumbing Program (3P).
Program facts last verified September 4, 2026 against City of Hamilton sources — programs can change or close at any time; confirm current amounts with City of Hamilton before signing a contract.
Storm season is here. July's storms flooded 1,900+ basements in Ottawa and drenched the GTA. Most Ontario cities pay part of the cost of flood protection — before the next one.
Find my city’s program →Basement flooded right now? Emergency steps first →
Hamilton's Protective Plumbing Program (3P) gives a grant of up to $2,000 toward a backwater valve and related works (a sump pump installed with the valve, plus downspout disconnection). Important: to get the full $2,000 you must use a contractor from the City's pre-qualified list — using an outside contractor caps the backwater valve grant at just $500.
Why Hamilton homes need this
Hamilton has hundreds of identified basement-flooding hot spots, concentrated in older neighbourhoods and the lower city, where combined sewers can surcharge during heavy storms. A backwater valve plus a sump pump is the core protection the City funds.
What the rebate covers
Combined under the up to $2,000 program cap. Per-measure limits may apply — confirm current amounts with City of Hamilton before you start.
Read this before you spend a dollar
To receive the full $2,000 grant you must use a City pre-qualified contractor — an outside contractor caps the backwater valve grant at $500. A building permit is required for the valve, and the grant is paid to you after the Building Inspector has passed the work.
Who qualifies
- •You own a single-family residential home with a basement, built before January 1, 2012
- •The home is connected to the City of Hamilton sewer system and your property taxes are up to date
- •You are not in the process of adding a secondary dwelling unit
- •Any unused balance of a previous $2,000 grant for the property can only go toward downspout disconnection
- •Work completed by a plumber or drain contractor licensed in Hamilton (the full grant only with a City pre-qualified contractor)
How to apply
- 1Call 905-546-2489 or email the City to confirm you are eligible, and get the Protective Plumbing Program assessment form.
- 2Choose a contractor from the City's pre-qualified list and have them assess your home.
- 3The contractor obtains the building permit, then completes the work.
- 4The Building Inspector inspects the work; submit the completed package to the City to receive the grant.
A building permit is required for backwater valve installation (the pre-qualified contractors' fee table lists it at $291); Adapt-a-valve installations also need City pre-approval.
Free assessment for your Hamilton home
Get connected with a licensed contractor who handles Hamilton flood-prevention rebates — they confirm what you qualify for, the pre-approval, and the paperwork. Free, no obligation.
Request free assessment →Other rebates you may be able to stack
Protective Plumbing Loan Program (City of Hamilton)
A loan of up to $2,000 at 4% interest, repaid through your tax bill over 10 years, for eligible costs — such as a new sump pump and pit installed with a backwater valve — that exceed the 3P grant. Permits and a City inspection are required, and the final invoice is due within 12 months of loan approval.
Downspout disconnection
$75 per downspout when completed by a pre-qualified contractor, with or without a backwater valve.
Hamilton areas covered
The program applies city-wide. Hamilton neighbourhoods include:
Common questions
How much is the Hamilton basement flooding rebate?
Hamilton's Protective Plumbing Program (3P) gives a grant of up to $2,000 toward a backwater valve and related works (a sump pump installed with the valve, plus downspout disconnection). Important: to get the full $2,000 you must use a contractor from the City's pre-qualified list — using an outside contractor caps the backwater valve grant at just $500.
Do I need a permit or pre-approval?
To receive the full $2,000 grant you must use a City pre-qualified contractor — an outside contractor caps the backwater valve grant at $500. A building permit is required for the valve, and the grant is paid to you after the Building Inspector has passed the work.
Who installs the work?
The work must be completed by a qualified, licensed contractor or plumber. A licensed contractor can confirm what you qualify for, handle the permit, and complete the paperwork.
Other areas
- Basement Flooding Rebate in Mississauga
- Basement Flooding Rebate in Brampton
- Basement Flooding Rebate in Vaughan
- Basement Flooding Rebate in Richmond Hill
- Basement Flooding Rebate in Markham
- Basement Flooding Rebate in Oakville
- Basement Flooding Rebate in Burlington
- Basement Flooding Rebate in Caledon
- Basement Flooding Rebate in Milton
- Basement Flooding Rebate in Ottawa
- City of Toronto — Basement Flooding Protection Subsidy
Source: City of Hamilton Protective Plumbing Program page (page modified September 3, 2026), S3P assessment form rev15 (January 2026) and the loan application form. Last verified September 4, 2026. ClaimRebate.ca is independent and not affiliated with the City of Hamilton. Official program page →