Repair, replace, or new construction — how to decide
The three most expensive septic decisions and how to think about them without panicking.
Every septic owner eventually faces some version of this question. The answer depends less on the symptom and more on the system's age, the soil it's sitting in, and what local rules will let you do.
Repair
Reasonable when the problem is isolated: a damaged baffle, a broken pipe between tank and drainfield, a cracked tank lid, a failed pump in a lift station, a clogged effluent filter. These are real problems with real fixes that don't reset the system's clock.
Replace (drainfield)
If the drainfield itself is failing — surfacing effluent, persistent odor, repeated backups even after pumping — a new drainfield is usually the answer. In Florida, this often means an upgrade to current code: a larger field, sometimes a mound, sometimes a different configuration entirely. Expect permitting and design time, not just install time.
Replace (full system)
If both tank and drainfield are at end of life, full replacement is often cheaper than serial repairs over the next five years. It also gives you a system sized for how the property is actually used today, not how it was used in 1985.
New construction
On a vacant lot, soil and water-table testing comes first. The result of that testing determines whether you get a conventional system, a mound, or an advanced treatment unit — and the price spread between those is significant. Don't budget a system until the soil report is done.
A useful frame
Ask the contractor not just 'what will it cost?' but 'what would you do if this were your house?' The honest ones will tell you when a repair is a stopgap and when it's a real fix.