Thornhill Plumbing and Drain Services
Updated August 18, 2026
City Rooter is a locally owned licensed plumbing and drain company serving Thornhill. We handle drain cleaning, drain repair and replacement, water line work, and 24/7 emergency plumbing. Call (647) 534-6875 or request a free estimate.
- Licensed local crew for Thornhill homes and businesses
- Written estimate before work starts
- Drain cleaning from $225 · emergencies from $200
Licensed & WSIB · Written estimates · 24/7 Mon–Sat · Sun 9 AM–5 PM
Licensed plumbers in Thornhill
Thornhill sits on Yonge with Vaughan on one side and Markham on the other. The plumbing does not care about the sign. Older estates have long laterals and big trees. Streets near Promenade have a mix of 1970s clay and later replacements. Newer condos have their own valves and stacks.
City Rooter is a licensed crew. We clean drains, camera sewer lines, repair laterals, and upgrade water services. You get a written price. Drain numbers are published. We do not treat a 200-foot run like a downtown bungalow.
If you already paid for a cleaning and the toilet still bubbles, start with video. That is the honest next step on these lots. A 150-foot run under a garden is not the same job as a 40-foot bungalow lateral. We measure and mark before anyone talks about opening the lawn.
Long laterals, trees, and finished basements
Uplands, German Mills, and the older Yonge streets were built when lots were generous. The sewer path is long. Clay joints have had decades of roots. A lush strip after a dry week is often the leak.
Finished basements are the rule, not the exception. A floor-drain backup ruins a rec room. We treat a gurgling main as urgent even when the kitchen still drains.
Some older services are still lead or galvanized. Low pressure and a buyer’s inspection are the usual reasons we open the meter pit. We confirm the material before we quote. Resale on Yonge moves fast. Having the service material on a camera or meter photo is cheaper than a condition that lands in the last week.
- Toilet that bubbles when the washer drains
- Backup on a long run to the street
- Soft lawn or a dip over the drain path
- Low pressure or discolored water in a pre-1970s house
- Sump that failed in a finished basement
- A drain that was snaked last season and came back
Drain cleaning and repair
Tub or shower $225, hand sink $250, kitchen $350, main via cleanout $325, main via toilet flange $450. Hourly work is $120 to $190.
We camera when the cable hits roots or a hard edge. Spot repair is for a short failure on an otherwise sound run. Replacement is for a line that is offset at most joints. You see that on the screen before we talk trench.
Water lines and emergencies
Water line upgrades typically run $2,000 to $10,000+. A ¾-inch line up to 30 feet is often $2,500 to $3,800. Thornhill frontages and interlocking driveways are why restoration sits on the estimate.
Emergency dispatch starts at $200. We cover burst pipes and sewage in living space. Call (647) 534-6875. Tell us whether you are west or east of Yonge so we know which city hall owns the permit if we need one.
How a Thornhill visit works
You describe the symptom and the nearest cross street. We book a window. On site we start at the cleanout when you have one. Older houses often do not.
You approve the written price. Vaughan and Markham permits are not interchangeable. We say which one applies before anyone cuts the boulevard.
Thornhill neighbourhoods
We work both sides of Yonge from Steeles north through the Promenade and German Mills.
- Yonge Street corridor and Promenade area
- Bathurst, Atkinson, and the Vaughan-side streets
- German Mills and the Don Mills Road pocket
- Uplands and the older estate lots
- Steeles corridor and the Bayview side streets
When to call
Same day for sewage or a burst pipe. This week for a main that already returned. A finished basement on a long clay run is a bad place to wait through one more storm. A licensed Thornhill plumber with published prices is (647) 534-6875.
Two cities, one Thornhill address
Yonge is the split. West is often Vaughan. East is often Markham. The permit, the inspector, and sometimes the water utility follow that line. We confirm the side before we open a boulevard so the paperwork matches the trench.
The plumbing itself does not change at the sign. Clay, trees, and long laterals show up on both sides. What changes is who stamps the permit. We handle that conversation before the first shovel, not after. If you are not sure which city hall you pay, your tax bill or the Yonge side of your lot is enough for us to check.
Services in Thornhill
- Drain Repair
- Drain Replacement
- Drain Cleaning
- Sewer & Drain Installation
- Drain & Sewer Camera Inspection
- Sump Pump Installation
- Backwater Valve Installation
- Water Line Replacement
- Water Service Upgrade
- Emergency Plumbing
- Toilet Installation
- Hydro Jetting
- Leak Detection
- Burst Pipe Repair
- Sink & Faucet Installation
- Lead Pipe Replacement
Reviews
Only 5-star reviews from GTA homeowners
★★★★★
Alex and his team replaced our main drain and broken pipes. He provided great service and workmanship, at reasonable prices. Highly recommend.
★★★★★
City Rooter installed a new waterline from the edge of the property into my basement. Alex worked with me to get the best solution possible, gave a very good price, and left everything neat and tidy.
★★★★★
They saved us from a major plumbing disaster. Tree roots clogged the drain. The team snaked the line, excavated, replaced the damaged pipe, and installed a cleanout. Professional, efficient, and fair.
Hear from homeowners we served near Thornhill
Watch drain repairs, water line work, and emergency calls — then read the Google reviews those jobs earned.
Frequently asked questions
How much does a plumber cost in Thornhill?
Hourly plumbing is typically $120 to $190. Drain cleaning starts at $225. A main-line snake through a cleanout is $325. Emergency dispatch starts at $200. Water line upgrades are usually $2,000 to $10,000+ depending on length and restoration.
Do you serve both the Vaughan and Markham sides of Thornhill?
Yes. Yonge Street splits the community. We work both sides — Promenade and Bathurst on the west, German Mills and the Markham streets on the east. Permits follow the municipality. We tell you which one before we open a boulevard.
Why do older Thornhill drains keep backing up?
Many lots have long laterals, mature trees, and original clay. Estates north of Steeles and older streets off Yonge show roots at the joints. A snake cuts the root. A camera shows whether the joint will let it back in next season.
Are you available for emergency plumbing in Thornhill?
Yes. 24/7 Monday to Saturday, Sunday 9 AM to 5 PM. Finished basements are common here, so backups go first. Dispatch starts at $200. Call (647) 534-6875.
Need a plumber in Thornhill?
Licensed, insured, WSIB-covered technicians. We answer live and typically reply to quotes in 5–10 minutes.