Well and Septic vs City Utilities: What It Really Does to Your Park's Value

Two parks, same town, same lot rents, same occupancy. One is on city water and sewer, the other runs on a well and a septic field. The city-utility park is worth more, and it isn't close. Buyers pay a lower cap rate for it, which means a higher price, and the reason has almost nothing to do with the water itself. It's about risk, and who gets stuck holding it. If you own a park on private utilities, this is one of the biggest quiet factors in your number, so let me walk through it.

Why buyers pay up for city utilities

When your park is on city water and sewer, the utility company owns the pipes in the ground, the treatment, and the liability. Something breaks, that's their problem and their capital. For a buyer, that's one whole category of nightmare taken off the table. Clean, predictable, hands-off. So they'll accept a lower return to own it, and a lower return means they'll pay more.

The moment your park is on a well, a septic system, or its own little wastewater plant, all of that risk lands on the owner. And these are not small risks. A failing drain field or an aging treatment plant can be a six-figure surprise, the kind of bill that eats a year or two of profit in one shot. Buyers know it, so they price the park at a higher cap rate to compensate for the capital they might have to pour in. That higher cap rate is a lower price.

The operator nobody tells you about

There's a second cost to private utilities that catches new owners off guard. If your park runs its own water or wastewater treatment, the state generally requires a licensed operator to run and report on that system. That's an ongoing expense and an ongoing compliance obligation, not a one-time thing. When I underwrite a park with a private plant, I build that operator cost into the expenses, and I make sure a buyer understands it's part of the deal, because it absolutely affects the net income the park really produces.

Septic is a little different but still yours: pumping, drain-field maintenance, and the risk of a replacement down the line. Well water means testing and treatment and the pump itself. None of it is a dealbreaker. It's just real, and it belongs in the math.

How much it actually moves the number

In practical terms, private utilities push a park's cap rate up and its expense load up at the same time, a double hit to value. It's not a rounding error. On the parks I price, going from city utilities to a private plant can move the value meaningfully, because you're both raising the return a buyer demands and lowering the income after those extra costs. When people ask why two similar-looking parks are priced so differently, the answer is often sitting underground.

The flip side: it's not all downside

Here's the fairer picture, because I don't want to scare anyone off their own park. Private utilities aren't a curse, they're a known quantity that gets priced. Plenty of great parks run on wells and septic for decades without drama, and plenty of buyers are perfectly comfortable owning them at the right price. What hurts an owner isn't having private utilities, it's not accounting for them, and then being surprised when a buyer's offer reflects a risk you'd been ignoring.

And there's real upside in knowing your system's condition cold before you sell. An owner who can show a recent inspection, a maintained plant, and clean compliance records takes a lot of the fear out of the buyer's mind, and fear is what widens the cap rate. Documentation is cheaper than a discount.

The takeaway

Your water and sewer setup is one of the first things I ask about when I price a park, right after who owns the homes, because it moves both the cap rate and the expenses. If you're on city utilities, that's a quiet asset worth making sure a buyer appreciates. If you're on a well, septic, or a private plant, the smart move is to know your system's condition and costs before you sell, so you're negotiating from facts instead of a buyer's worst-case imagination.

My valuation model asks about your utilities for exactly this reason and adjusts the number accordingly. Run your park through it and you'll see how much your setup is really worth.