At a glance
| Who regulates | Your municipality's Sewage Enforcement Officer, under PA DEP rules |
|---|---|
| Inspection when a home is sold | No statewide requirement found. Penn State describes real estate inspections as a way for buyers and sellers to reduce risk, separate from regulatory inspections. Some municipalities require periodic inspections. |
Septic tank size in Pennsylvania
Minimum septic tank sizes by bedroom, from Penn State Extension:
| Home | Minimum tank |
|---|---|
| 3 bedrooms | 900 gal |
| 4 bedrooms | 1,250 gal |
| 5 bedrooms | 1,400 gal |
| 6 bedrooms | 1,550 gal |
Compare with other states on our tank size calculator.
Real estate inspections (PSMA/NOF)
- Base price $350–$700 in south-central Pennsylvania (2026).
- All tanks must be pumped during the inspection, adding $275–$500.
- A hydraulic load test, if required, adds $500–$1,000.
Pumping
- Penn State Extension recommends pumping every two to three years for most homes.
Costs
We don't yet have checked Pennsylvania-specific prices. National figures: pumping averages about $420–$430 (pumping cost), inspections about $550 on average (inspection cost), and a conventional system $3,000–$8,500 installed (installation cost).
Rules change, and counties and towns can be stricter than the state. Confirm with the agency above before you buy, sell or build.