Water coming up a floor drain in a Royal Oak basement raises one question before any other: did the city's sewer fail, or the line that runs from your house to it? Royal Oak publishes a clear answer on who owns which piece of pipe, and a less clear one on claims. Here is what the city says, what state law adds, and what to do for yourself in the meantime.
Who to call, and when
During working hours, call the Department of Public Service at 248-246-3300. After hours, call the Police Department non-emergency line at 248-246-3500, and the police dispatch a sewer representative (City of Royal Oak, Responding to Street and Basement Flooding). The city's page lists the weekday hours two different ways, so check the hours before you count on a live answer.
Call the day you find the water. It puts the backup on the city's record on the date it happened, which matters if you end up filing a claim.
Who owns which pipe
Royal Oak draws the line in a specific place. The city handles the main line. The homeowner is responsible for the cleanout up to and including the sewer connection. If the blockage is in the city main, a crew is dispatched to clear it right away and returns during regular hours to clean the line thoroughly. If the blockage is in your service line, the city will tell you to call a plumber or a sewer cleaning company (City of Royal Oak, Responding to Street and Basement Flooding).
That split is the whole game. A crew that clears the main and finds your lead clean points toward a claim against the city. A crew that finds the main running and your lead blocked points toward your own wallet and your own insurance policy. Ask the crew which one they found, and write down the answer with the date and time.
What causes a backup
The city names tree roots, disposable diapers, and grease as the common culprits that block the cleanout (City of Royal Oak, Responding to Street and Basement Flooding). Diapers and grease are household habits you can change. Roots are not.
Royal Oak scores 67 on the Basement Risk Index, 27th of 116 metro communities, with about 61 percent of homes built before 1960 and a median year built of 1956. The score is modeled from housing data, not measured house by house, and it does not describe the sewer under your street. It does say that most of the housing is old enough for a lateral to have had decades to fail.
The claim, and what we could not confirm
We looked for a Royal Oak claim procedure and did not find one on the city's flooding page. It does not mention a claim form, an address to send one to, or a deadline. So here is only what state law says, and you should confirm the where and the who by phone at 248-246-3300.
Michigan law says a claimant is not entitled to compensation for a sewage backup unless the government agency is notified in writing within 45 days after the damage was discovered. The notice is limited to your name, address, and telephone number, the address of the damaged property, the date you discovered the damage, and a brief description of what happened. After a proper notice, the agency may inspect, and you cannot unreasonably refuse access (Michigan law on sewage backup claims, MCL 691.1419). A short letter or email that carries those items, sent early and kept in a folder, is the safe move. Filing on time does not mean getting paid, but filing late almost certainly means not getting paid.
Record it, then dry it
Take photos of the drain, the waterline on the walls, and every damaged item while it is still where it landed. Write down the date and hour you found the water and roughly how deep it got, and keep every receipt for pumping, hauling, and replacement. Tell your insurance company the same week.
Then get things drying. The EPA advises drying water-damaged areas and items within 24 to 48 hours to prevent mold growth, and notes that porous materials such as carpet may have to be thrown away if they become moldy (EPA, A Brief Guide to Mold, Moisture and Your Home).
Keeping it from happening twice
Because the cleanout is yours, a backup that comes from your own lead is a repair you pay for. A backwater valve is the fix aimed at backups specifically, and FEMA lists a sewer backflow valve among the steps worth taking (FEMA, Protect Your Property From Flooding). As a planning range, a retrofit runs $1,500 to $3,500. If your trouble is seepage and not sewage, start cheaper. Clearing gutters, extending downspouts, and regrading so the yard slopes away from the house run $0 to $200 and are the first things to try.
Sources reviewed
Primary sources checked October 2026:
- City of Royal Oak, Responding to Street and Basement Flooding, romi.gov.
- Michigan law on sewage backup claims, MCL 691.1419, legislature.mi.gov.
- EPA, A Brief Guide to Mold, Moisture and Your Home, epa.gov.
- FEMA, Protect Your Property From Flooding, fema.gov.