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Septic Tank Installation in Palmetto Bay, FL

New septic installations in Palmetto Bay are mostly replacements and rebuilds, since the village is built out and still largely on septic.

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  • Septic tank installation
  • Palmetto Bay, Miami-Dade
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Septic tank installation in Palmetto Bay: the short answer

New septic installations in Palmetto Bay are mostly replacements and rebuilds, since the village is built out and still largely on septic. A new system needs DERM approval and an advanced treatment unit, and Ordinance 22-83 does not allow one where a public sewer abuts the lot.

Start by checking whether sewer runs past your lot. With 6,158 septic parcels in the County's 2020 count, most of the village is not sewered, but where a gravity sewer or force main is available and operating at the property, a new septic system is not permitted and the house connects instead.

A yellow excavator lowering a new precast concrete septic tank on chains into an excavation in white sand and limestone
Illustration A yellow excavator lowering a new precast concrete septic tank on chains into an excavation in white sand and limestone.

Where septic is allowed, the low ground near the bay shapes the design. A treatment unit that meets NSF/ANSI 40, 245 or 350, a drain field at least 36 inches above the wet-season water table and 100 feet from any canal or lake are the starting points, and on many lots that means a raised field.

What the numbers say about Palmetto Bay

  • The County's 2020 billing data counted 6,158 parcels with septic systems in Palmetto Bay, about 5% of the county total, against about 8,681 homes. (Miami-Dade WASD, 2020 data) (U.S. Census ACS 2020-2024)
  • In the County's 2018 groundwater study, 893 of Palmetto Bay's 5,757 modelled residential septic parcels (16%) already reached peak groundwater within 42 inches of the surface; the projection for 2030 was 1,753. (Miami-Dade, 2018)
  • The County asks residents of municipalities such as Palmetto Bay to check sewer status with their local water and sewer department. (Miami-Dade WASD)
A home with a screened pool by the bay and a mangrove shoreline, two green septic riser lids in the lawn beside a coconut palm
Illustration A home with a screened pool by the bay and a mangrove shoreline, two green septic riser lids in the lawn beside a coconut palm.

How we handle installation in Palmetto Bay

  1. We check sewer availability first.
  2. A site evaluation sets the design limits.
  3. The engineered design goes to DERM and the permit application to the Department of Health.
  4. We install the treatment unit and drain field and the system is inspected before cover.

New systems in South Florida, usually mound, aerobic or performance-based, typically cost $12,000 to $30,000. (Septic & Well Pro, 2026)

Septic tank installation in Palmetto Bay: questions

Can I add a guest house to a Palmetto Bay septic system?

Only if the system is sized for the extra flow, and each system may serve only one lot. Adding bedrooms usually means a design review and often a larger or upgraded system.

Is a new septic system in Palmetto Bay more expensive than inland?

Often, because low sites need more fill or a mound to meet the 36-inch separation. Advanced treatment units across South Florida are generally in the $12,000 to $30,000 range before site work.

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.