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Septic system disclosure

2 min read
Short answer
A septic system disclosure is the written statement a Minnesota seller must give about any subsurface sewage treatment system serving the property — whether one exists, where it is, and whether it is known to comply with applicable standards. Like the well disclosure it is a separate statutory obligation that a buyer cannot waive, and a non-compliant system can require replacement costing tens of thousands.

A septic system disclosure is the written statement a Minnesota seller must make about any subsurface sewage treatment system — an SSTS — serving the property.

For property outside municipal sewer service, which is most of greater Minnesota, it is one of the two disclosures that matter most, alongside the well disclosure.

What it covers#

Whether a system exists, where it is located, and what is known about its compliance status.

The compliance question is the substantive one. Minnesota classifies systems against standards, and a system that fails those standards falls into categories with different consequences — from needing upgrade at some point, to being an imminent threat to public health requiring correction within a short statutory window.

Why it cannot be waived#

Like the well disclosure, this sits outside the general seller's disclosure regime.

The general disclosure under Minn. Stat. 513.52 to 513.60 can be waived where the parties agree in writing. The septic disclosure cannot be waived by the buyer, and neither can the well disclosure, lead paint, radon, methamphetamine, airport zoning or predatory offender registry disclosures.

A seller doing an as-is sale with a general disclosure waiver still owes this one.

The money#

This is where it stops being paperwork.

Replacing a failed septic system is commonly a five-figure cost, and on difficult sites — poor soil, high water table, small lot, shoreland regulation — it can be considerably more. Some sites cannot accommodate a conventional system at all and require alternative designs at higher cost.

On rural Minnesota property it is routinely the largest single item to emerge during a transaction, larger than anything the inspection finds in the house.

County rules on top#

Counties administer SSTS programmes and their requirements differ.

Many require a compliance inspection at the point of transfer or at the point a permit is sought. Some require upgrade within a stated period after purchase where a system does not comply. Shoreland areas carry additional standards.

Anyone buying rural property should establish the specific county's transfer requirements before signing rather than after, because they determine who bears the cost and on what timetable.

Where this shows up in distressed property#

Rural tax-forfeited parcels and long-vacant rural houses very often carry systems that have not been used, inspected or maintained for years.

A property that has sat empty through a probate or a forfeiture redemption period may have a system that was compliant when last used and is not now — and the compliance cost lands on the buyer, frequently exceeding what the parcel itself sold for.

For anyone evaluating rural distressed property, the septic question belongs in the numbers at the same stage as the purchase price.

Common questions

Can a septic disclosure be waived?
No. Like the well disclosure, it sits outside the general seller's disclosure that the parties can waive under Minn. Stat. 513.60. A buyer cannot waive it and a seller cannot avoid it by agreement.
What is an imminent threat to public health?
A system failing in a way that discharges sewage to the ground surface or to surface water, or that backs up. Systems in that category generally must be brought into compliance within a short statutory period rather than at the owner's convenience.
Who pays to replace a failing system?
Whatever the parties negotiate, but it is a substantial figure — commonly tens of thousands of dollars depending on soil, site and system type. On rural property it is frequently the largest single item that emerges during a transaction.
Keep reading
Well disclosure certificate
A Minnesota document identifying every known well on a property being sold, required by statute and not waivable by the buyer.
Seller's disclosure
The written statement of known material facts a Minnesota seller must give a buyer before signing an agreement to convey the property.
Home inspection
A professional visual examination of a property's condition and systems, commissioned by the buyer to identify defects before the purchase becomes binding.