Flooded basement or water after rain
Active or recent water? Start with the symptoms, timing and likely plumbing source.
TORONTO & MARKHAM PLUMBING
Basement Flooding Solutions for Toronto, Vaughan & Markham
Help with basement flooding, sewer backups, sump pump problems, backwater valves, waterproofing, flood prevention, flood-resistant doors and garage flood protection.
- Licensed & insured
- Toronto & Markham
- Residential & commercial
- Clear written scope
Municipal programs decide eligibility and payment. We explain the plumbing work, sequence and useful records without promising a rebate.
START WITH WHAT YOU SEE
What is happening in your basement?
Different symptoms point to different causes. Start with the situation that best matches what you are seeing, then Matt can help narrow down the plumbing or drainage source.
Sewer or floor drain backing up
Water or sewage coming through a basement drain calls for sewer-side diagnosis and prevention planning.
Backwater valve or sump pump
Review whether sewer-backup protection, groundwater control or backup power fits the property.
Water through walls, floors or openings
Seepage through the structure needs a different diagnosis from a sewer backup or failed sump system.
Owner-operatedSpeak directly with Matt Ouellette
Local plumbing serviceToronto, Vaughan and Markham properties
Experienced field workAssessment, installation and repair
Clear written scopeOptions explained before major work
DIAGNOSIS BEFORE REPAIR
Find the source before choosing the solution.
Basement water can start with a drain, sewer connection, foundation drainage, sump system or the structure itself. Matt starts with the symptoms and evidence so the recommended work matches the actual problem.
Recurring drain or sewer problemUse a camera inspection when evidence is needed before repair.
Concern about sewer backupReview the private sewer layout and whether a backwater valve is appropriate.
Sump pump not working properlyCheck the pump, float, check valve, discharge and power before replacing parts.
Water entering through a wall or floor may require drainage or waterproofing work. Matt can help distinguish that from a plumbing or sewer problem.
PLUMBING & FLOOD-PROTECTION SERVICES
The practical services most homes need.
Choose a service or call with the symptoms. We can help determine whether the concern starts with the sewer, foundation drainage, surface water, equipment or a damaged pipe.
SEWER BACKUP PROTECTIONBackwater valves
Assessment, installation, replacement, alarms and accessible service covers.
Backwater valve service →
GROUNDWATER MANAGEMENTSump pumps & backup
Sump pump systems, alarms, battery backup, repairs and replacement planning.
Sump pump service →
DRAINS & SEWERSDrain and sewer work
Camera inspection, drain cleaning, repair options and private sewer-lateral work.
Drain and sewer service →
WATER ENTRYWaterproofing support
Interior drainage, foundation-wall membrane work and coordination around plumbing.
Waterproofing options →
DIAGNOSISCamera inspections
Evidence-based inspection before deciding whether cleaning, repair or replacement is appropriate.
Camera inspection →
START HEREHome plumbing assessment
A practical review of the history, visible plumbing, drains, sump equipment and flood-protection options.
Assessment details →EXAMPLES OF OUR WORK
View the full project gallery
Real installations. Visible workmanship.
Project photographs and a short on-site video help homeowners understand what the work can look like before, during and after installation. Every property is different, so the final scope depends on site conditions and assessment.
SHORT VIDEO WITH MATT
Watch a real basement flood-protection project.
This short on-site video gives homeowners a more direct look at the kind of basement plumbing, sump and flood-protection work involved on a real project.
- Real work by Matt Ouellette
- Useful for homeowners comparing options
- Part of our focus on clear explanations and visible workmanship
OWNER-OPERATED PLUMBING SERVICE
One person accountable from the first call to the finished work.
Matt Ouellette owns and operates Ouellette Plumbing & Drains. He reviews the symptoms, explains what the system is doing and recommends work based on the conditions in the home.
You will not be pushed toward a product before the source of the problem is considered. The goal is a clear scope, practical options, real photo records and work that remains serviceable after installation.
Direct contact with MattWritten scope before major workPhotos and records for completed work
Meet Matt and learn how he worksBusiness: Ouellette Plumbing & Drains · Website: BasementFlooding.ca · Owner-operator: Matt Ouellette · Service area: Toronto & Markham · Phone: 416-710-0905
CUSTOMER REVIEWS
See our service standards
What homeowners say about working with us.
Clear explanations, respectful workmanship and useful project records matter as much as the plumbing itself.
The problem was explained clearly before any work started. We understood why the backwater valve was recommended and what access would be needed.
The crew was respectful of our finished basement, kept the work area organized and left us with clear photos and information.
We had questions about the Toronto rebate and sump-pump options. The steps were explained without pressure, and the paperwork was much easier to follow.
Customer names are withheld for privacy.
FAST RESPONSE OPTIONS
Talk directly with Matt Ouellette.
Describe what you have noticed, when it happens and whether there is active water or sewage. Matt will help identify the most useful next step.
- Toronto residential service
- Licensed and insured plumbing help
- Clear scope before major work
- Postal code captured for service-area confirmation
TRAINING & QUALIFICATIONS
Training that supports better flood-protection work.
Matt Ouellette has completed flood-protection training through Regional Stormwater Management, including backwater-valve and flood-protection technician coursework.
A SIMPLE PROCESS
Listen. Assess. Explain.
You should understand why work is being recommended before you decide what to do.
Tell us what is happening
Call with the address, past flooding, visible water, drain symptoms or equipment concerns.
We assess the relevant conditions
We review the plumbing, drainage and property conditions connected to the problem.
You receive clear next steps
We explain priorities, suitable work and useful documentation in plain language.
MUNICIPAL PROGRAM GUIDANCE
Toronto and Markham use different programs.
Choose the municipality where the property is located so the process, eligible work and documentation are not mixed together.
Up to $6,650 for eligible Toronto measures.
Toronto’s expanded program includes a plumbing assessment, up to two backwater valves, a sump pump, battery backup and foundation-drain severance, subject to current conditions.
Toronto subsidy guidance →Pre-approval and the correct Markham sequence matter.
Markham’s program may cover backwater valves, weeping-tile disconnection and eligible private-lateral work, subject to municipal eligibility, permits and inspections.
Markham rebate guidance →Municipal programs determine eligibility, approval and payment. Confirm current program requirements before relying on an amount or starting eligible work.
Program information checked September 2, 2026. City of Toronto ↗ City of Markham ↗
LOCAL SERVICE
Serving Toronto, Vaughan and Markham properties.
Our local pages connect homeowners and property managers with the most relevant service, municipal program and nearby coverage information.
North YorkScarboroughEtobicokeEast YorkYorkMarkhamUnionvilleThornhillVaughan
View all service areas
Toronto & MarkhamResidential and commercial service
COMMON QUESTIONS
Clear answers before you commit to work.
The right answer depends on the property, plumbing layout and source of water.
Do I need a sump pump, a backwater valve, or both?
They address different risks. A sump pump generally manages groundwater or foundation drainage. A backwater valve helps prevent sewer water from flowing backward into private plumbing.
Do you work on commercial properties?
Yes. We provide assessment, drain and sewer inspection, sump-system, backwater-valve and flood-risk plumbing support for commercial and multi-residential properties.
Can you guarantee a municipal rebate?
No. The municipality decides eligibility, approval and payment. We help with the plumbing work and useful project documentation.
What should I do first?
Call with the property address and a short description of what you are seeing. We will help determine the most useful next step.
Published by BasementFlooding.ca / Ouellette Plumbing & Drains. Updated September 4, 2026.Final recommendations depend on the property, existing plumbing and an appropriate assessment.Our content standards →