Typical components
- Utility tap / impact / connection fee — set by the utility, often the largest line
- Lateral installation — plumber, by distance and obstacles
- Tank abandonment — septic contractor, pump-out plus crush/fill, permitted
- Restoration — driveway, yard, landscaping
Brevard. Out-of-pocket for a conversion typically runs $5,000–$20,000 out of pocket before grants; Port St. John estimates ran far higher, but the Septic-to-Sewer (Quick Connect) grant covers design, permits, materials, labor and connection fees for eligible properties where a main is available, and the county has pre-qualified plumbing firms for grant work. The monthly sewer bill afterward is based on water use. Port St. John is the cautionary tale: where sewer has to be extended a long way, per-property estimates have run to six figures, which is why the ATU-upgrade path exists. Read septic-to-sewer grant and the 2030 deadline.
When it beats a new drain field: if a main is at the street and the field has failed, connection is often cheaper than $5,000–$15,000; mound or elevated fields at the top of that range — and it ends the septic maintenance cycle permanently. When it doesn't: a long lateral, a lift pump because the house sits below the main, or no main within reach.