Miami · Miami-Dade County
Sewer Line Repair in Miami, FL
Single-family homes in Miami built before about 1975 generally have cast-iron drain lines under the slab, and in South Florida's wet, salty ground many have corroded until the bottom of the pipe is gone. Slow drains throughout the house, sewer odors and insects coming up through drains are the usual signs.
- Independent local pros
- Free referral, no obligation
- You approve the price before work starts
What is different about sewer line repair in Miami?
The water table sits only a few feet below the surface here, which is why homes have no basements and why under-slab pipe lives in damp soil. A camera inspection through a cleanout shows the condition: heavy scaling, cracks and channels worn through the bottom. Ask for the recording, because the choice of repair depends on how much sound pipe is left.
Options are replacement, by tunneling under the house or trenching through the floor, and lining where the pipe is intact enough to hold a liner. High groundwater complicates excavation and tunneling. Permits come from Miami-Dade County or from your municipality, such as the City of Miami, Miami Beach or Coral Gables. If your home is on a septic system, slow drains after heavy rain point to the drain field instead.
From the Miami plumbing guide
Deteriorated cast-iron drains
Under-slab cast iron in older South Florida homes corrodes until the bottom of the pipe is gone. Slow drains throughout the house, sewer odors and insects coming up through drains are common signs. Options include replacement by tunneling or trenching and, where the pipe is sound enough, lining.
What to check and ask before work starts in Miami
- Ask for the camera video and a written description of the pipe's condition
- Ask whether lining is viable or whether sections are too far gone
- Ask how groundwater will be handled during excavation
- Verify the contractor's Florida license and which jurisdiction issues the permit
Licensing and permits for sewer line repair in Miami
Florida licenses plumbing contractors through the Department of Business and Professional Regulation, and the license can be verified online. Permits are issued by Miami-Dade County or by the municipality the property is in, such as the City of Miami, Miami Beach or Coral Gables.
Keystream Plumbing is a referral service. We do not perform plumbing work or hold a contractor license. The independent plumber you are connected with is responsible for licensing, permits and the work itself.
What the job usually involves
The steps are the same in Miami as anywhere; the local conditions above change how each one is done.
- Clear and camera
- Locate and mark
- Choose the method
- Permit, repair and inspect
Sewer Line Repair questions from Miami
Why do cast-iron pipes fail in South Florida homes?
Cast iron corrodes from the inside over decades, and under-slab pipe here also sits in moist ground near a high water table. Homes built before about 1975 are now well past the age at which this pipe commonly fails.
Can my cast-iron drains be lined instead of dug up?
If the pipe still holds its shape and can be cleaned, lining may be an option and avoids opening floors. Where the bottom has worn away or sections have collapsed, replacement is usually needed. The camera footage should support whichever is recommended.
Sources
- Water supply and treatment, Miami-Dade Water and Sewer Department
- Hardness of water, US Geological Survey
Local information reviewed October 1, 2026. Rules and programs change; confirm details with the agency before you rely on them.
More plumbing help in Miami
Sewer Line Repair in other cities
Ownership rules, soil, water and pipe materials make this a different job from one city to the next.
Related guides: Main Sewer Line Clog: Signs and What to Do, When to Call an Emergency Plumber (and When It Can Wait).
Need sewer line repair in Miami?
Call (833) 520-4758. Same-day service is often available; call to check timing.