How to Evaluate a Mobile Home Park Before You Buy: The Tax Due Diligence Checklist

Buying a mobile home park is not like buying a single-family rental. The tax due diligence on a park is substantially more complex — multiple asset classes, mixed depreciation schedules, park-owned homes with personal property tax treatment, utility infrastructure with its own depreciation profile, and a set of entity documents that may have been maintained (or not) over decades of operation.

If you skip the tax due diligence or treat it as a formality, you’re buying someone else’s problems. Prior passive losses you can’t use. Depreciation schedules that leave money on the table. POH titles that create legal uncertainty after closing. Outstanding tax liens that survive the sale. None of these are hypothetical — they’re the things that surface in real MHP transactions and cause real headaches.

This checklist covers what to request, what to look for, and what red flags mean. Work through it with your CPA before you remove contingencies.

Item 1: Three Years of Entity Tax Returns

What to request: All federal and state income tax returns for the operating entity (LLC, partnership, S-corp, or C-corp) for the three most recent tax years. Include all schedules and attachments — particularly Schedule K-1s if it’s a multi-member entity, Form 4562 (depreciation), and any state composite returns.

What to look for:

• Passive losses: Does the entity show suspended passive losses on Schedule K-1 or on the seller’s individual return? These losses belong to the seller and do not transfer to you. You’re not getting a tax benefit from the prior owner’s unused losses — but understanding the loss history helps you understand the economics of the deal.
• Audit history: Has the entity been audited? Check for IRS correspondence, adjustments, or amended returns. A prior audit doesn’t disqualify the deal, but it’s material information.
• Entity issues: Is there a tax form mismatch? (E.g., an LLC that made an S-election you weren’t told about, or an entity that changed structure mid-stream.) Ownership changes that weren’t reflected in allocations. These create post-acquisition complications.
• Income consistency: Does reported income match the rent roll and bank statements? Significant divergences require explanation.

Red flags: Large unexplained adjustments between years. Amended returns filed recently before listing. Missing years. Significant discrepancy between reported income and operating bank account deposits.

Item 2: Seller’s Depreciation Schedules

What to request: The seller’s current Form 4562 and the full fixed asset register showing every depreciable asset, its original cost, the depreciation method (MACRS vs. straight-line), the recovery period, the placed-in-service date, accumulated depreciation to date, and current net book value.

What to look for:

• POH depreciation period: Are park-owned homes on 5-year MACRS (correct for personal property) or 27.5-year (incorrect, treating them as residential real property)? A seller depreciating POHs at 27.5 years has been taking far less depreciation than they should. This tells you two things: the seller’s tax records may have been mismanaged, and there may be a cost segregation opportunity post-acquisition when you correct the classification.
• Land improvements: Are roads, utility infrastructure, and site improvements classified as 15-year land improvements or have they been lumped into 39-year commercial property? This affects your post-acquisition depreciation picture and the value of commissioning a new cost segregation study.
• Fully depreciated assets still in service: Are there assets on the register at $0 net book value that are still operational? This is common and fine — just understand what’s been fully written off.

Red flags: POHs depreciated at 27.5 years. No cost segregation study on a park of meaningful size. Assets on the register that aren’t physically at the park. Assets at the park that aren’t on the register.

Item 3: Existing Cost Segregation Study

What to request: Any cost segregation study commissioned during the seller’s ownership, including the engineering report and asset reclassification schedule.

What to look for: Whether one exists at all. If it does, review the reclassified asset amounts and confirm they align with the depreciation schedule. Also note the study date — a study done at acquisition of the park reflects the prior purchase price allocation, not yours.

What this tells you: An existing cost segregation study shows a seller who was managing their taxes aggressively. It also gives you a baseline understanding of how assets were classified and what personal property components exist in the park. You’ll likely commission a new study based on your acquisition cost, but the seller’s study is useful context.

Red flags: A study that was completed but not reflected in the depreciation schedules. A study where the reclassified amounts don’t reconcile with the fixed asset register.

Item 4: POH Title Documentation

What to request: Copies of all Certificates of Title for park-owned homes — the state-issued personal property title documents (not real estate deeds). Also request the seller’s complete list of POHs with VIN numbers, make, model, and year for each home.

What to look for:

• Title completeness: Is there a title document for every home on the list? Missing titles are a serious problem.
• Titleholder name: Does the title name match the selling entity? If titles are in an individual’s name, a prior entity’s name, or a deceased person’s name, they need to be retitled before or at closing.
• Liens: Are there outstanding liens on individual titles from prior financing, floorplan lenders, or consumer installment contracts? Verify all liens have been properly released.
• Affixture status: Have any homes been affixed to the real estate (a state-law process that converts personal property to real property)? Affixed homes have different legal treatment and financing implications.

Red flags: Missing titles for multiple homes. Titles in names other than the operating entity. Unexplained liens. Any home for which the seller cannot produce title documentation.

Item 5: Utility Billing Records

What to request: Three years of utility billing records — the master utility bills from the utility provider and the resident sub-billing records if the park runs its own billing. Also any utility billing service agreements if the park outsources billing.

What to look for:

• Ratio Utility Billing System (RUBS) vs metered: Is the park sub-metering utilities to residents or allocating by formula? Metered sub-billing is more defensible and often more profitable. RUBS billing is subject to regulatory challenge in some states.
• Utility recovery rate: What percentage of the master bill is the park recovering from residents? Significant losses on utility billing represent either a billing problem or a lease structure that doesn’t allow pass-through — both affect NOI.
• Aging infrastructure: High master utility bills relative to the number of lots may indicate leaks, aging lines, or inefficient infrastructure. This is a capital expenditure risk.

Red flags: Utility recovery significantly below the master bill with no explanation. Inconsistent billing records. Multiple periods where master utility bills spiked dramatically (suggesting leaks or infrastructure failure).

Item 6: Outstanding IRS or State Tax Liens

What to request: A lien search through the county recorder and Secretary of State’s office for federal tax liens (filed by the IRS under IRC §6321) and state tax liens. Also ask the seller directly whether any tax assessments, notices of deficiency, or collection actions are pending.

What to look for: Any filed Notice of Federal Tax Lien (NFTL) attaches to all property of the taxpayer, including the park if the park is an asset of the individual whose taxes are unpaid. A lien on the property that isn’t addressed at closing can follow the property to you as a buyer.

Red flags: Any filed federal tax lien in the seller’s name or the operating entity’s name. Unpaid state tax obligations. IRS notices that suggest an ongoing examination or collection matter.

Item 7: Deferred Installment Obligations

What to request: Disclosure of any existing installment sale obligations related to the park’s current ownership — if the seller originally purchased the park on installment terms and is still making payments to a prior seller, those obligations affect the deal structure and tax treatment.

What to look for: Outstanding seller carry notes from when the current owner acquired the park. These may accelerate or trigger recognition events depending on how the current sale is structured. Also look for any deferred income recognized under installment method that is embedded in the entity’s prior tax returns.

Red flags: Undisclosed seller carry obligations from the prior acquisition. Installment obligations with acceleration clauses triggered by transfer of the property.

Putting It Together: Your Due Diligence Timeline

The tax due diligence checklist doesn’t operate in isolation. It runs parallel to your physical inspection, environmental review, legal review, and financial underwriting. The typical MHP due diligence period runs 45-90 days for a park of meaningful size. Tax review should begin in week one of due diligence — not week eight when you’re running out of time to negotiate.

For new investors, understanding cap rate and cash-on-cash return is the essential financial foundation before any due diligence begins. And if this is your first park, see the tax setup checklist for new MHP owners for what comes immediately after closing.

FAQ

For IRS guidance on federal tax liens and lien searches, see IRS: Understanding a Federal Tax Lien.

Internal links: Cap Rate vs Cash-on-Cash for MHP Investors | First MHP Tax Setup Checklist | What Is NOI and How Do MHP Owners Calculate It

Disclaimer: This post is for educational and informational purposes only and does not constitute tax, legal, or financial advice. Tax laws change and individual circumstances vary. Consult a qualified tax professional and attorney before completing any real estate acquisition. The MHP Accountant® is an enrolled agent firm; engagement of professional services is required for personalized advice.