Mobile Home Park Development: Tax Considerations From Day One

Developing a mobile home park from the ground up is a fundamentally different tax experience than acquiring an existing park. When you buy, the infrastructure exists, the depreciation basis is established at acquisition, and the income begins immediately. When you develop, you spend months or years building before you see a dollar of revenue — and the IRS has specific rules about what you can do with those costs during that period.

Getting the tax structure right from the first site plan review matters. Costs that could have been deducted may instead need to be capitalized. Timing decisions on entity structure and asset classification affect your tax position for the entire hold period. And the developer-operator’s tax profile is fundamentally different from the developer-seller’s.

This guide covers the full tax landscape of MHP development from the day you break ground to the first occupied lot.

Development Costs vs. Acquisition Costs: The Core Difference

When you acquire an existing MHP, a significant portion of the purchase price is allocated to assets that are already in service — and depreciation begins immediately. Cost segregation can then identify short-lived components and accelerate your deductions.

When you develop an MHP from raw land, the situation is different. All development costs — land acquisition, site clearing, infrastructure construction, permit fees, engineering, and architectural costs — are capitalized into the basis of the assets you’re building. Nothing is “placed in service” until the asset is ready and available for use. Depreciation doesn’t begin until that milestone.

This is the fundamental tax challenge of development: you’re spending cash and incurring costs for months or years before a single dollar of depreciation flows to your tax return. The IRS does not allow you to deduct construction-in-progress as an expense — it must be capitalized into the assets being built.

Carrying Costs During Development: IRC §263A

The IRS has rules specifically designed to address costs incurred during the production of real property. Under IRC §263A (the Uniform Capitalization rules, or “UNICAP”), certain costs that would otherwise be currently deductible must be capitalized into the basis of the property being produced, if you are considered a “developer” rather than an investor.

The most significant categories of carrying costs that may need to be capitalized under §263A include:

• Interest expense during the construction period — if you have a construction loan, the interest may be required to be capitalized into the cost of the project rather than deducted currently (IRC §263A(f) — the capitalization of interest rules)
• Property taxes — taxes on the land and improvements during the development period may need to be capitalized rather than deducted
• Developer overhead — certain overhead costs that are properly allocable to the production activity must be capitalized

The capitalization of interest under §263A(f) is particularly important. If your construction loan covers the period from land acquisition through certificate of occupancy, a portion of that interest — the “avoided cost” allocated to the constructed assets — must be added to the basis of what you’re building rather than deducted as a current interest expense.

The upside: capitalized interest becomes part of your depreciable basis and generates future depreciation deductions. The downside: you lose the current deduction. For a developer in a high-income year, the loss of current interest deductions can be significant.

Capitalizing Infrastructure Costs Correctly During Construction

The way you track and record costs during development determines your ability to benefit from cost segregation once the park is placed in service. Every infrastructure system should be capitalized separately from the beginning — not lumped into a single “construction in progress” account.

Here’s how to think about the tracking structure:

• Land — acquisition cost, legal fees, title insurance (non-depreciable)
• Site work and clearing — may be allocated between land (permanent grading) and land improvements (removable or temporary earthwork)
• Roads and paving — separate category, 15-year land improvement at completion
• Water system — separate category; further sub-divided between distribution lines (15-year) and equipment (5-year or 7-year)
• Sewer/septic — separate category; same sub-division as water
• Electrical distribution — separate category; sub-divide distribution (15-year) from metering equipment (shorter-lived)
• Stormwater / drainage — separate category, 15-year land improvement
• Community structures — clubhouse, office, manager’s unit (27.5-year or 39-year depending on classification)
• Permit and soft costs — allocated to the assets they benefit; engineering costs for the water system are allocated to the water system basis

When the park is complete and placed in service, your cost segregation engineer uses these records to assign the correct MACRS class lives to each component. Clean records mean a faster study, lower cost, and a more defensible result.

When Does Depreciation Begin? The Placed-in-Service Analysis

For a multi-phase or large development, different components are placed in service at different times. You don’t need to wait for the entire park to be complete to begin depreciating the first sections.

Example: You develop a 100-lot MHP in two phases. Phase 1 (50 lots) is complete and the first residents move in during October of Year 1. Phase 2 (50 lots) completes in March of Year 2. Depreciation on all Phase 1 infrastructure begins in October of Year 1, regardless of when Phase 2 is complete.

Document the placed-in-service dates carefully — you’ll need them when the cost segregation study is completed and when you calculate depreciation for each tax year. A certificate of occupancy (CO) is strong evidence of a placed-in-service date for structures. For infrastructure, substantial completion and availability for use is the standard.

Developer-Operator vs. Developer-Seller

One of the most important tax distinctions in MHP development is whether you intend to hold and operate the park or sell it after development.

Developer-Operator

If you develop the park and then operate it — retaining ownership and collecting lot rent — the tax treatment is as described above. You capitalize development costs, begin depreciation when assets are placed in service, and the park is treated as investment property held for long-term appreciation and income.

Over time, cost segregation, bonus depreciation, and Section 179 can generate significant tax shields. Your exit strategy (1031 exchange, estate hold, outright sale) determines when and how you pay tax on the accumulated gain.

Developer-Seller

If you develop the park with the intent to sell it — treating it as a product of your development business rather than an investment — the tax treatment changes dramatically. The park may be treated as “inventory” in a dealer’s hands, meaning:

• Gain on sale is ordinary income, not capital gain — no long-term capital gains rate
• The park may not be eligible for 1031 exchange (held primarily for sale in ordinary course of business, not for investment)
• Depreciation deductions during the development/holding period may be limited by the ordinary income characterization

The determination of whether a developer is a dealer (ordinary income) or an investor (capital gain) is highly fact-specific. Intent at the time of development is a key factor. The IRS and courts look at the number of sales, the marketing activities, the holding period, the consistency of the development business, and other factors.

A developer who intends to hold parks but sells one for an extraordinary price should document their investment intent clearly and consistently across tax returns and business records. Mixing investor and dealer activity is a red flag.

Entity Structure for Development Projects

Development projects often use a different entity structure than long-term holding. A common approach:

• Development LLC — holds the land during development, employs or contracts with the development team, bears the construction risk
• Operating LLC — receives the completed park from the development LLC at completion, holds the park for long-term operation

The transfer of the completed park from the development entity to the operating entity must be done at fair market value or within a carefully structured inter-company transaction to avoid triggering unintended income or gain recognition. If both entities have the same ownership, certain tax-neutral transfer mechanisms may be available — but this requires careful planning and professional guidance.

For related reading, see our guides on MHP infrastructure depreciation, MHP loan interest deductibility, and tax strategy for MHP acquisition.

Disclaimer: This content is provided for general educational purposes only and does not constitute tax, legal, or financial advice. Tax laws change frequently and individual circumstances vary — including the dealer vs. investor determination, which is highly fact-specific. Consult a qualified tax professional before making any decisions based on this information. The MHP Accountant® provides tax services — not legal advice.