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Septic-to-Sewer Conversion in Coral Gables, FL

Coral Gables has more septic parcels than any other city in Miami-Dade, 7,934 in the County's 2020 count, so septic-to-sewer conversion is a live...

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  • Septic-to-sewer conversion
  • Coral Gables, Miami-Dade
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Septic-to-sewer conversion in Coral Gables: the short answer

Coral Gables has more septic parcels than any other city in Miami-Dade, 7,934 in the County's 2020 count, so septic-to-sewer conversion is a live question for many owners here. Conversion is possible where a public sewer runs past the property; then it is a new lateral, a plumbing permit, utility approval and abandoning the tank.

Sewer data for Coral Gables comes partly from the city's own utility: the County's 2018 study lists Coral Gables among the utilities outside WASD that supplied their own non-sewer data, and the County's Connect 2 Protect page asks residents of municipalities to contact their local water and sewer department. Start there to learn whether your street has a line.

A residential street with a new sewer manhole in fresh asphalt and a small lift station with a grey control panel on the swale
Illustration A residential street with a new sewer manhole in fresh asphalt and a small lift station with a grey control panel on the swale.

The city's housing is old for Miami-Dade, a median build year of 1969, and its median home value of about $1.09 million means a failed septic system is a large problem on an expensive lot. Where sewer is available, homestead single-family owners may qualify for up to $15,000 in County grants or low-interest loans toward the conversion.

What the numbers say about Coral Gables

  • The County's 2020 billing data counted 7,934 parcels with septic systems in Coral Gables, about 6% of the county total, against about 22,020 homes. (Miami-Dade WASD, 2020 data) (U.S. Census ACS 2020-2024)
  • Coral Gables has its own water and sewer utility, one of those that supplied non-sewer data directly to the County's 2018 study. (Miami-Dade, 2018)
  • In the County's 2018 groundwater study, 195 of Coral Gables's 2,930 modelled residential septic parcels (7%) already reached peak groundwater within 42 inches of the surface; the projection for 2030 was 256. (Miami-Dade, 2018)
A Mediterranean-style coral rock home under a banyan tree with two round concrete septic lids in the side lawn by a coral rock wall
Illustration A Mediterranean-style coral rock home under a banyan tree with two round concrete septic lids in the side lawn by a coral rock wall.

How we handle sewer conversion in Coral Gables

  1. We confirm that a public gravity sewer abuts the property.
  2. We arrange the plumbing permit and the utility approval.
  3. The Department of Health issues a permit to pump out and abandon the tank.
  4. We lay the new lateral, connect, and abandon the tank.

A typical Florida conversion costs $5,000 to $20,000; Miami-Dade estimates about $15,000 for a homeowner. (Septic & Well Pro, 2026)

Septic-to-sewer conversion in Coral Gables: questions

Is my Coral Gables street on sewer?

Ask the city or Miami-Dade Water and Sewer. Many Coral Gables streets are not: the County counted 7,934 septic parcels in the city in 2020, the highest of any municipality.

What permits does a Coral Gables conversion need?

Under the County's assistance program: a pump-out and abandonment permit from the Department of Health, an allocation letter from the County's Regulatory and Economic Resources department, a plumbing permit and water and sewer utility approval.

Sources

Last updated: October 28, 2026. Facts and figures on this page come from these sources, opened on October 28, 2026. Prices are typical published ranges, not a quote.