The deal looked perfect on paper.

Seventy-two lots in East Tennessee. 85% occupied. City utilities — or so the listing said. Cap rate penciling out to a 7.2%. Seller wanted a quick close.

By the time the new owner discovered the property’s “city water” connection was actually a 40-year-old private community water system running under a deteriorating easement agreement — with the municipality holding zero maintenance responsibility — the ink was already dry.

The fix? $210,000 to drill a new well and run new lines. Twelve months of cash flow, erased.

This story isn’t unique. It’s playing out across mobile home park acquisitions in the Southeast right now, and it’s the #1 cause of deals turning into disasters for both new and experienced investors.

Why Infrastructure Due Diligence Is Different in Mobile Home Parks

When you buy a single-family home, due diligence is relatively straightforward — home inspection, title search, done. When you buy a mobile home park, you’re not just buying a piece of real estate. You’re buying infrastructure. Roads. Water systems. Sewer lines. Electrical pedestals. Underground plumbing that may be original to a 1968 construction date.

And unlike multifamily apartments — where a busted water heater affects one unit — a failing private well or sewer system can affect every single resident in your park simultaneously. That means regulatory exposure, potential habitability violations, and an operator responsibility that doesn’t just go away.

The problem is compounded by how mobile home parks have historically changed hands. For decades, these were mom-and-pop operations owned by families who deferred maintenance for years, didn’t document repairs, and sometimes didn’t fully understand their own regulatory obligations. When you buy from them, you inherit all of it.

The Infrastructure Problems That Kill Deals After You Close

Here are the most common utility nightmares we see in the Southeast market:

1. Private Water Systems Misrepresented as Municipal

Many older parks were built with community water systems that were technically private but operated similarly to municipal service. Sellers — and sometimes their own listing agents — describe these as “city water” because residents receive a water bill. They’re not city water. You are the water utility, which means you’re subject to Safe Drinking Water Act compliance, EPA oversight, and potentially significant capital infrastructure requirements.

2. Failing Sewer Systems and Private Lagoons

In rural North Carolina, Tennessee, Georgia, and South Carolina, it’s still common to encounter parks with aging septic systems, private lagoon systems, or package wastewater treatment plants. These are expensive to operate, heavily regulated, and increasingly subject to enforcement action from state environmental agencies. NC’s Department of Environmental Quality and Tennessee’s TDEC have both increased inspection activity since 2024.

3. Aging Underground Infrastructure

Cast iron sewer lines from the 1950s–70s crack, collapse, and root-invade. PVC lines from the ’80s and ’90s aren’t much better after decades of ground movement. The cost to camera-scope and replace aging underground lines in a 70-lot park can run $80,000–$300,000+, and you won’t see it without a proper inspection.

4. EPA Compliance Notices Inherited at Closing

If a park has outstanding EPA correspondence, unresolved consent orders, or unpermitted discharges, that becomes your problem the moment you take title. Sellers aren’t always forthcoming about this — and sometimes they genuinely don’t know it exists.

The Due Diligence Protocol That Protects You

After reviewing hundreds of mobile home park deals across North Carolina, Tennessee, Georgia, and South Carolina, here’s what a proper infrastructure due diligence process looks like:

Step 1: Pull EPA and State Environmental Records

Before you spend a dollar on physical due diligence, search the EPA’s ECHO database (echo.epa.gov) and your state’s environmental agency database for the property address and any related permits. In NC, that’s NC DEQ’s online permit lookup. In TN, it’s TDEC’s database. Look for active permits, permit violations, enforcement actions, and compliance notices. This takes 30 minutes and can save you six figures.

Step 2: Demand Three Years of Utility Correspondence

Request ALL correspondence with any utility authority, municipality, or regulatory agency for the past three years as part of your due diligence documentation package. Sellers who balk at this are telling you something.

Step 3: Hire a Civil Engineer, Not Just a Home Inspector

General property inspectors are not equipped to evaluate utility infrastructure. Hire a licensed civil engineer to conduct a physical assessment of water systems, sewer lines (including camera scope), electrical pedestals, and road condition. Budget $3,000–$7,000 for this. It’s cheap insurance.

Step 4: Underwrite the Infrastructure Risk

Whatever your civil engineer finds, underwrite a repair reserve into your acquisition model. Standard practice: budget a minimum of 5% of purchase price as an infrastructure remediation reserve in your Year 1 projections. If the park passes inspection cleanly, that money goes to value-add improvements. If it doesn’t, you’re covered.

Step 5: Build in Contractual Protection

Include a utility due diligence contingency in your LOI and purchase and sale agreement. Specifically carve out a right to renegotiate price or walk if material utility deficiencies are discovered during the due diligence period. This is standard in most commercial transactions but often skipped in mobile home park deals where buyers are eager to close.

What We Do at Keel Team

At Keel Team, we’ve reviewed and acquired mobile home parks across the Southeast for years. Infrastructure due diligence is the first thing we evaluate — before we get excited about the rent roll, before we model value-add scenarios, before we call the seller back.

We’ve walked away from deals that looked excellent on paper because the utility infrastructure told a different story. And we’ve acquired parks where the infrastructure was the advantage — properties connected to city water and city sewer, with proven systems, that other buyers passed on because they didn’t understand what they were looking at.

We cover the full infrastructure review process — including state-specific environmental database lookups and civil engineer coordination — in the Keel Team Mobile Home Park Due Diligence Playbook. It’s free, and it’ll save you from the most expensive mistakes in this asset class.

The Bottom Line

Mobile home park investing is one of the most durable, cash-flowing asset classes in real estate. But the due diligence process is fundamentally different from other property types — and the infrastructure component is where most investors either protect themselves or get destroyed.

Don’t skip the civil engineer. Pull the EPA records. Demand the utility correspondence. And never close on a park without knowing exactly what kind of utility system you’re buying.

Your portfolio will thank you.

Keel Team specializes in the acquisition and operation of mobile home parks across North Carolina, Tennessee, Georgia, and South Carolina. For more resources on mobile home park investing, visit keelteam.com.