
The Dirty Truth About Septic System Inspections in Arizona
By Jonathan Baer, Dominion Group Properties

Let’s talk about everyone’s favorite topic: septic systems. Glamorous, right? Yeah… not so much. But if you’re selling or buying in Phoenix and across Maricopa County—Cave Creek, Carefree, Desert Hills, New River, even Prescott and the high country—you need to know how septic inspections actually affect your deal.
The 6-Month Rule (and why sellers wait)
In Arizona, a septic inspection is typically valid for six months. That’s why most sellers order the inspection after they’re under contract—not months in advance. If you jump early and the clock runs out, you’re paying for it twice. And I can’t stand wasting time—or money.
The concrete problem (literally)
Here’s the headache lately: a lot of 20–30-year-old concrete tanks are starting to crack and spall (translation: the concrete’s flaking and failing). Inspectors are marking reports as “Functional with Concerns.” Does it work today? Sure. Does that open the door for a buyer to renegotiate tomorrow? Also yes.
That little checkbox can become a $10,000–$15,000 conversation depending on tank size and how stubborn the dirt is on your lot. Replace a tank in caliche or rock and—boom—there goes the vacation fund.
Roots, fields, and other “surprises”
Tree roots love septic tanks and leach fields like kids love splash pads. Once they’re in, you might be looking at jetting, repairs, or even field replacement. Add Arizona’s rocky soils to the mix and costs can climb. “It’s just a little root,” said no invoice ever.
Smart move: pre-inspect (sometimes)
If your system’s older or you’ve got big trees nearby, it can be prudent to inspect before you list. Why? So you know what you’re walking into—before a buyer uses “Functional with Concerns” to reopen the deal and drag you through an expensive renegotiation. Prior, Proper, Planning, Prevents, Piss, Poor, Performance. You following me?
For buyers: protect yourself without blowing the deal
- Make sure the inspection is within the 6-month window.
- If you see “Functional with Concerns,” ask for bids and timelines—not just guesses.
- Check for age, material (concrete), visible cracking/spalling, and nearby trees.
- Budget realistically: tanks and fields can run $10k–$15k+ with tricky soils.
Bottom line (Jonathan’s truth bomb)
Septic systems aren’t sexy, but they’re serious. Sellers: know your system before the buyer does. Buyers: verify, price it in, and don’t ignore warning labels disguised as “concerns.” Perception is reality and reality is perception.
Want a straight-talk game plan? Schedule a quick call and we’ll map your next steps—no fluff, just facts.
Meet Jonathan Baer, Designated Broker of Dominion Group Properties.
Start your home search here.
See the latest Maricopa County market trends.