How do I know if my Arvada home is on sewer or septic?

Inside the city utility, wastewater leaves through the city sanitary sewer system, per the City of Arvada. In the unincorporated Jefferson County pockets around the city, homes run on-site wastewater systems instead. Your utility bill, the property listing, or a records request to Jefferson County Public Health settles the question quickly if you are not sure.

Does the Jefferson County use permit apply in Arvada?

Not to homes on the city sewer system, but yes to an on-septic property in the surrounding unincorporated county. When such a system was installed more than five years before the sale date, Jefferson County Public Health requires an inspection with the tank pumped and a use permit before the sale, per the county Use Permit Program.

Who pays for the transfer inspection and use permit?

The county requires the document; it does not dictate who pays. The seller usually orders the inspection and the application, since the clock runs against the closing, and any repair costs get negotiated between buyer and seller in the purchase agreement. The county application fee and the private inspection fee are separate line items.

How long is the Jefferson County use permit good for?

Jefferson County Public Health states the use permit is valid until the closing date or six months, whichever comes first. That short window means there is no banking a permit months ahead of a listing. Time the application against a real closing date, submitted no less than 10 working days out.

Septic in Arvada: a tale of two utility maps

Most Arvada homes will never need this page. The city operates its own sanitary sewer utility, with over 450 miles of sewer pipe carrying wastewater to Metro Water Recovery for treatment, per the City of Arvada. Step past the utility boundary into the unincorporated Jefferson County pockets around the city, though, and the picture flips: those properties run their own on-site wastewater systems, and selling one runs through a use permit from Jefferson County Public Health.

This page covers which side of that line matters for your sale, how the use permit works, and what the costs look like. When you need the inspection or any follow-up work, we connect you free with an independent local septic contractor; how we make money explains the arrangement.

The pocket problem

Arvada grew around older acreage properties that were never annexed, and county islands like these are where the transfer rule fires. Two houses a short walk apart can face entirely different closing checklists: one drains to the city system, the other to a tank and soil treatment area that Jefferson County Public Health will want inspected before the deed records. The address alone does not tell you, because an Arvada mailing address reaches well into unincorporated Jefferson County.

For a buyer, that distinction is worth settling before the offer, not after. An on-septic property carries the inspection, the use permit timeline, and the maintenance rhythm of a private system, all invisible from the curb.

The use permit, from listing to closing

The trigger is system age: the requirement applies when the OWTS was installed more than five years before the sale date. An approved inspector evaluates the system with the tank pumped and inspected, and where a well serves the property, a well water sample tested for total coliform and nitrate is required as well. The application goes to Jefferson County Public Health no less than 10 working days before closing, and the resulting permit is valid until the closing date or six months, whichever comes first, per the county's Use Permit Program.

Since the tank gets pumped as part of the inspection, sellers usually book the pumping and the evaluation as one visit. The transfer inspection page walks the full sequence, county by county.

Costs to plan around

The private inspection is quoted per site, typically a few hundred dollars, and the county publishes its current use permit application fee on the program page. Where the inspection surfaces real work, Jefferson County's construction permit fees are published too: $1,023 for a new system, repair, or addition, and $523 for a tank-only replacement, per the Jefferson County Public Health FAQ. The repair itself is the variable; the repair page explains what deficiencies typically require.

The same county rule governs sales in Golden and Evergreen, and the transfer guide sets Jefferson County beside Larimer and Boulder for anyone comparing across county lines.

Verify your county's transfer document

Before scheduling anything, confirm the current requirement and fee with Jefferson County Public Health's Use Permit Program. Then tell us the situation and the match with an independent local septic contractor costs you nothing.

Get matched with an Arvada septic pro

Questions homeowners ask

How do I know if my Arvada home is on sewer or septic?: Inside the city utility, wastewater leaves through the city sanitary sewer system, per the City of Arvada. In the unincorporated Jefferson County pockets around the city, homes run on-site wastewater systems instead. Your utility bill, the property listing, or a records request to Jefferson County Public Health settles the question quickly if you are not sure.
Does the Jefferson County use permit apply in Arvada?: Not to homes on the city sewer system, but yes to an on-septic property in the surrounding unincorporated county. When such a system was installed more than five years before the sale date, Jefferson County Public Health requires an inspection with the tank pumped and a use permit before the sale, per the county Use Permit Program.
Who pays for the transfer inspection and use permit?: The county requires the document; it does not dictate who pays. The seller usually orders the inspection and the application, since the clock runs against the closing, and any repair costs get negotiated between buyer and seller in the purchase agreement. The county application fee and the private inspection fee are separate line items.
How long is the Jefferson County use permit good for?: Jefferson County Public Health states the use permit is valid until the closing date or six months, whichever comes first. That short window means there is no banking a permit months ahead of a listing. Time the application against a real closing date, submitted no less than 10 working days out.