What Title 5 is
Title 5 is the state septic code, 310 CMR 15.000. The part that matters when you sell is the inspection rules in 310 CMR 15.300 to 15.305. MassDEP runs the program and your town's Board of Health enforces it on the ground.
The inspection checks whether the system can protect public health and the environment as it stands on the day of the visit. MassDEP is clear that a pass does not guarantee the system will keep working.
How to tell if your house is on septic
Start with paper. A house on town sewer usually gets a sewer charge on the water bill or tax bill. A septic house does not. Your town's Board of Health or sewer department can confirm in a short call, and it holds the septic records for most addresses.
You can also look: a buried tank often has a lid in the yard, and the original plans or a prior Title 5 report may be in your closing papers. Towns differ a lot. Septic is more common in the lower-density parts of towns north of Boston, such as parts of Stoneham, Wakefield, Saugus, Peabody, Danvers, Lynnfield, North Reading and Reading, but it varies street by street even inside one town. Do not assume. Check the exact address.
If the house is on sewer, Title 5 has no on-site system to inspect. We did not find a separate rule requiring a sewer inspection at sale, but ask your Board of Health to be sure.
When an inspection is required, and when it is not
Per Mass.gov, an inspection is required within 2 years before a sale. If weather conditions prevent it (for example, frozen ground), the inspection must happen within 6 months after the sale, and the seller must tell the buyer in writing. The same rule covers foreclosures, bankruptcy transfers and condo sales (the association or unit system, depending on size).
| Transfer | Inspection needed? |
|---|---|
| Regular sale to a buyer | Yes, within the 2 years before the sale |
| Between current spouses, parents and children, or full siblings | No |
| Refinance or new mortgage | No |
| Change of trustee or guardian, or a change in form of ownership with no new party (estate planning, divorce) | No |
| Buyer or owner signs a binding agreement with the Board of Health to upgrade or connect to sewer within 2 years | No, if the agreement is disclosed and binds later owners |
| New or upgraded system with a Certificate of Compliance | No, for 2 years (up to 3 with pumping records) |
A sale of an inherited house is a regular sale to a new buyer, so it usually needs an inspection. See inherited or probate homes and the probate guide.
Pass, conditional pass and fail
Only a MassDEP-approved system inspector can do the inspection, and the report must be on the state form. The inspector sends it to the Board of Health within 30 days, and the seller must give the buyer a copy.
| Result | What it means | What you do |
|---|---|---|
| Pass | The system meets Title 5 standards on the inspection date | Give the buyer the report |
| Conditional pass | A part needs repair, such as a cracked or metal tank, a broken pipe, an uneven distribution box or a bad pump chamber | Repair it; with Board of Health approval it then passes |
| Fail | The system does not meet the standard. A failed leaching field or a cesspool cannot be fixed under a conditional pass | Upgrade within 2 years, or an agreed schedule |
If a system fails and you decide not to sell, you still have to fix it. The report goes to the Board of Health either way.
Who pays, and what a failed system does to a sale
Under Title 5 the owner arranges the inspection. Mass.gov says the buyer and seller may move that duty in writing, as long as the inspection still happens on time. Who pays for the inspection and for any repair is a deal term. In most Massachusetts sales the seller orders and pays for the inspection and the purchase and sale agreement says what happens if it fails. That is custom, not law, and we could not find an official figure for the cost.
A failed system can be expensive. Common outcomes are a lower price, a seller credit or escrow holdback, the buyer taking on the upgrade under a Board of Health agreement, or a cash buyer. The agreement section the state lists for septic covers the acknowledgement of when an inspection is due, what happens if the system fails, and who is responsible for cost. See the purchase and sale agreement guide.
Massachusetts also offers an income tax credit for the repair or replacement of a failed septic system (MGL c.62 s.6(i)), which was increased for tax years from January 1, 2023. Ask your CPA how much applies.
Selling as-is with a failed system? You still have to disclose the report and meet Title 5. See selling a house as is.
Seller steps
- Confirm septic or sewer with your Board of Health.
- Look for an existing inspection less than 2 years old (3 with annual pumping records).
- If you need one, hire a MassDEP-approved inspector. Mass.gov points to the New England Interstate Water Pollution Control Commission list.
- Get the report within 30 days. Give the buyer a copy.
- If it is a conditional pass or fail, talk to your attorney about repair, credit or escrow before the purchase and sale agreement is signed.
This is general information, not legal advice.