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Fannie Mae Guidelines: Manufactured Housing Underwriting Requirements

At a Glance

  • All manufactured home loans must be processed through Fannie Mae's DU automated underwriting system with correct property classification
  • Standard down payment requirement is 5% from borrower's own funds; MH Advantage homes qualify for 3% with 95-97% financing
  • Land equity and trade equity from existing manufactured homes can count toward down payment at specified percentages with documentation
  • Single-width manufactured homes cannot qualify for cash-out refinancing; only multi-width homes have limited cash-out options
  • Property type verification, down payment source documentation, and land ownership timing are critical to avoid application delays

What Makes Manufactured Home Financing Different

Manufactured home loans follow stricter rules than traditional site-built homes. Fannie Mae treats these properties as higher risk, which means more documentation requirements and tighter lending standards.

Your lender must run your loan through DU (Desktop Underwriter), Fannie Mae's automated system. When they enter your property information, they must correctly identify it as a manufactured home or MH Advantage property. DU will cross-check the address against its database of known manufactured home locations.

Here's what happens if there's confusion about your property type: Say you're buying what you think is a site-built home, but DU flags the address as a possible manufactured home. Your lender must research the property's actual construction type. If it turns out to be manufactured, they'll need to resubmit your loan with the correct property classification and follow all manufactured home requirements.

Down Payment Requirements and Your Own Funds

The standard rule requires 5% down payment from your own funds. This is stricter than conventional loans for site-built homes, where you might use gift money for your entire down payment.

You can use gift funds or employer assistance for your down payment only if your loan-to-value ratio is 80% or lower, or if you're buying a primary residence and meet specific gift requirements outlined in other Fannie Mae guidelines B3-4.3-01: Stocks, Stock Options, Bonds, and Mutual Funds, B3-4.3-02: Trust Accounts, and B3-4.3-03: Retirement Accounts.

MH Advantage homes get better treatment. These are manufactured homes that meet enhanced construction standards and look more like site-built homes. If your home qualifies as MH Advantage and you're financing 95-97% of the value, you only need 3% down from your own funds.

Using Land Equity as Your Down Payment

If you already own the land where your manufactured home will sit, that equity counts toward your down payment requirement. The calculation depends on when and how you acquired the land.

For land owned more than 12 months, your equity equals the current appraised value minus any existing liens. If you bought the land within the past 12 months, your equity is based on the lesser of what you paid or the current appraised value.

Say you bought a lot for $50,000 eight months ago, but it now appraises for $60,000. Your equity contribution would be calculated using the $50,000 purchase price, not the higher appraised value. You'll need documentation showing your cash investment in the land purchase.

If you inherited the land or received it as a gift, the full appraised value counts as your equity. Your lender will need documentation proving how you acquired the property.

Trading Your Existing Manufactured Home

You can use equity from your current manufactured home toward your down payment on a new one. Fannie Mae allows up to 90% of the retail value from the NADA Manufactured Housing Appraisal Guide.

The 12-month ownership rule applies here too. If you've owned your current home for less than a year, your trade equity is limited to the lesser of 90% of retail value or the lowest price the home sold for during that 12-month period.

Any costs to remove your old home or pay off existing liens get subtracted from your trade equity. The seller of your new home must provide proof that they've handled the title transfer and lien satisfaction on your traded home.

How Loan Amounts Get Calculated

Your loan can include the manufactured home cost, land cost, and construction expenses. Construction costs cover transportation, site preparation, foundation work, utilities, site improvements, and installation.

Personal property items cannot be financed. If you're buying furniture, appliances, or other non-realty items with the home, these must be subtracted from the sales price and paid separately.

For new manufactured homes, your loan-to-value ratio gets calculated using the lower of two numbers: the sales price (home plus land) or the "as completed" appraised value. If you bought the land recently, special pricing rules may apply based on what you paid versus current market value.

Refinancing Rules and Restrictions

Limited cash-out refinancing works similarly to conventional homes. You can refinance to pay off existing liens on your manufactured home and land, finance construction costs, pay closing costs, and take up to $2,000 or 1% of the new loan balance in cash.

Cash-out refinancing has strict limitations. Only multi-width manufactured homes qualify - single-width homes cannot get cash-out refinancing at all. You must have owned both the home and land for at least 12 months before applying.

This restriction exists because single-width homes are considered higher risk investments. Fannie Mae limits cash-out options to preserve the borrower's equity stake in these properties.

Required Documentation

Your lender needs standard mortgage documents plus manufactured home-specific paperwork. For land purchases within 12 months, you'll need proof of your cash investment in the land purchase.

If you're trading an existing manufactured home, the seller must provide title transfer documentation and proof that any existing liens are satisfied. Your lender will conduct lien searches in both real property and personal property records.

For construction loans, all work must be complete before Fannie Mae purchases your loan. If construction finishes after your first payment, your loan may face additional seasoning requirements.

Common Problems That Derail Applications

Property type confusion causes frequent delays. Many borrowers don't realize their home is classified as manufactured, especially with newer MH Advantage properties that look like site-built homes. Your lender must research and verify the construction type, which can add time to your approval.

Down payment source issues trip up many applicants. Unlike conventional loans, you cannot rely entirely on gift funds unless you meet specific criteria. Plan to have your own funds available for the minimum contribution.

Single-width home buyers often discover financing limitations late in the process. These homes cannot get cash-out refinancing, and some lenders have additional restrictions beyond Fannie Mae's requirements.

Land ownership timing affects your equity calculations. If you bought land recently, you might have less equity to work with than expected, potentially requiring additional cash for your down payment.

References

For the official guidelines, see B5-2-03: Manufactured Housing Underwriting Requirements in the Fannie Mae Selling Guide.

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Original Fannie Mae Guideline Text

B5-2-03, Manufactured Housing Underwriting Requirements (10/08/2025)

Down Payment Requirements

Trade Equity from the Borrower’s Existing Manufactured Home

Construction-to-Permanent Transactions

Uniform Appraisal Dataset (UAD) 3.6 Supplement

Underwriting and DU Requirements

Loans secured by manufactured homes (including MH Advantage properties) must be underwritten through DU.

When entering the property information into DU, the lender must correctly identify the property type as a manufactured home or MH Advantage, and identify whether it is in a condo, co-op, or PUD project.

Note: DU does not distinguish between single-width and multi-width.

DU checks the subject property addresses against manufactured home property addresses in the DU property database. If DU’s database indicates the property may be a manufactured home, DU will return a message alerting the lender. DU’s issuance of this message does not necessarily mean the property is a manufactured home, nor does the absence of this message indicate that Fannie Mae accepts the accuracy of the property type as it was submitted

Lenders must research the subject property type. If it is determined the property is a manufactured home, the lender must correct the property type and resubmit the loan casefile to DU. If it is NOT a manufactured home, the loan may be delivered with the appraisal recommendation provided by DU.

Note: DU will issue a message reminding the lender to ensure that the MH Advantage or single-width manufactured home requirements are met, in addition to all other manufactured housing requirements.

Loan Amount

The loan amount may include the following costs:

cost of the manufactured home;

cost of the land;

the costs of construction, including

bona fide and documented transportation costs,

costs for site preparation, which may include the cost to remove an existing manufactured home and other outbuildings,

foundation,

establishing utilities,

all site improvements, and

dwelling installation at the site.

Any personal property items (non-realty items) purchased in conjunction with the manufactured home must be deducted from the sales price and cannot be financed as part of the loan.

Down Payment Requirements

A minimum down payment of 5% must come from the borrower’s own funds unless:

the LTV or CLTV ratio is less than or equal to 80%;

the borrower is purchasing a one-unit principal residence and meets the requirements to use gifts, donated grant funds, or funds received from an employer to pay for some or all of the borrower's minimum contribution. See ; ; and , for additional information; or

the property meets the MH Advantage requirements and the loan meets the requirements for LTV ratios of 95.01-97%. In this case, the borrower must contribute a minimum down payment of 3%, from their own funds unless the loan meets the gift, grant, or funds from an employer policy referenced above.

The borrower's equity in the land is considered the borrower’s own funds. Where the borrower holds title to the land on which the manufactured home will be permanently attached, the value of the land may be credited toward the borrower’s minimum down payment (or equity requirement for a refinance). The borrower’s equity contribution will be the difference between any outstanding liens against the land and the market value of the land.

The following table describes how to determine the value of the land based on when and how the borrower acquired the land.

Documentation Requirements

More than 12 months preceding the loan application.

The current appraised value.

None.

12 or fewer months preceding the date of the loan application.

The lesser of the sales price or the current appraised value.

The lender must document the borrower’s cash investment by obtaining:

The borrower acquired the land at any time as a gift, inheritance, or other non-purchase transaction.

The current appraised value.

The lender must obtain appropriate documentation to verify the acquisition and transfer of ownership of the land.

Trade Equity from the Borrower’s Existing Manufactured Home

Trade equity from the borrower’s existing manufactured home may be used as part of the borrower’s minimum down payment requirement. The maximum equity contribution from the traded manufactured home is 90% of the retail value for the traded manufactured home based on the NADA Manufactured Housing Appraisal Guide except:

If the borrower has owned the traded manufactured home for less than 12 months preceding the date of the loan application, the maximum equity contribution is the lesser of 90% of the retail value or the lowest price at which the home was sold during that 12 month period.

Any costs associated with the removal of the traded home or any outstanding indebtedness secured by liens on the home must be deducted from the maximum equity contribution.

Traded Manufactured Homes

For traded manufactured homes, Fannie Mae requires a lien search in the appropriate real property and personal property records to verify ownership and to determine whether there are any existing liens on the manufactured home and land, or on the home and the land if they are encumbered by separate liens. The seller of the new manufactured home must provide proof of title transfer and satisfaction of any existing liens on the traded manufactured home.

Purchase Money Transactions

Purchase money transactions are those in which the mortgage proceeds are used to finance the purchase of the manufactured home or the manufactured home and the land. The land may be previously owned by the borrower, either free of any mortgage or subject to a mortgage that will be paid off with the proceeds of the new purchase money mortgage.

Note: The borrower does not receive any cash back with a purchase money transaction.

New Manufactured Homes

The LTV ratio (and CLTV/HCLTV ratio, if applicable) for a loan secured by a newly built manufactured home that is being attached to a permanent foundation system in connection with a purchase transaction will be based on the lower of:

the sales price of the manufactured home plus:

the lowest sales price at which the land was sold during that 12 month period if the land was purchased in the 12 months preceding the loan application date; or

the current appraised value of the land if the land was purchased more than 12 months preceding the loan application date.

the “as completed” appraised value of the manufactured home and land.

Existing Manufactured Homes

An existing manufactured home is one that already exists on its foundation.

Manufactured Home Subdivision Development

In cases where a manufactured home is being sold to a consumer by a builder, developer, or manufacturer acting as a developer as part of a new or existing manufactured home subdivision, the LTV ratio (and CLTV/HCLTV ratio, if applicable) for a loan secured by an existing manufactured home will be based on the lower of:

the sales price of the manufactured home and land; or

the current appraised value of the manufactured home and land.

All Other Transactions

The LTV ratio (and CLTV/HCLTV ratio, if applicable) for a loan secured by an existing manufactured home will be based on the lowest of:

the sales price of the manufactured home and land;

the current appraised value of the manufactured home and land; or

if the manufactured home was built in the 12 months preceding the loan application date, the lowest price at which the home was previously sold during that 12-month period, plus the lower of:

the current appraised value of the land, or

the lowest price at which the land was sold during that 12-month period (if there was such a sale).

Note: The above purchase requirements do not apply to single-closing construction-to-permanent transactions. See

for additional information.

Limited Cash-Out Refinance Transactions

Limited cash-out refinance transactions may involve the following scenarios:

payoff of an existing personal property lien on a new manufactured home (or an existing lien on the home and a mortgage on the land if encumbered by separate liens), or

payoff of a first lien mortgage secured by an existing manufactured home and land (or existing mortgages for the home and land if encumbered by separate liens).

The maximum LTV ratio (and CLTV ratio, if applicable) for a limited cash-out refinance transaction for a loan secured by a manufactured home and land will be based on the lower of:

the current appraised value of the manufactured home and land; or

if the manufactured home was owned by the borrower for less than 12 months on the loan application date and:

if the home and land are secured by separate liens, the lowest price at which the home was previously sold during that 12-month period plus the lower of the current appraised value of the land, or the lowest sales price at which the land was sold during that 12-month period (if there was such a sale);

if the home and land are secured by a single lien, the lowest price at which the home and land were previously sold during that 12-month period.

Proceeds of a limited cash-out refinance mortgage may be used to:

pay off the outstanding principal balance of an existing personal property lien or first lien mortgage secured by the manufactured home and land (or existing liens if the home and land were encumbered by separate first liens);

pay off the outstanding principal balance of an existing subordinate mortgage or lien secured by the manufactured home and/or land, but only if it was used to purchase the manufactured home and/or land;

finance costs of construction;

finance closing costs (including prepaid expenses); and

provide cash back to the borrower in an amount that does not exceed the greater of 1% of the balance of the new refinance mortgage or $2,000.

A cash-out refinance:

involves the payoff of an existing first lien mortgage secured by the manufactured home and land (or existing liens if the home and land were encumbered by separate first liens); or

enables the property owner to obtain a mortgage on a property that does not already have a mortgage lien against it, and permits the borrower to take equity out of the property in the form of mortgage proceeds that may be used for any purpose.

To be eligible for a cash-out refinance, the property must be a multi-width manufactured home (single-width are not permitted). The borrower must have owned both the manufactured home and land for at least 12 months preceding the date of the loan application. The LTV, CLTV, and HCLTV ratios will be based on the current appraised value of the manufactured home and land.

New Construction of a Manufactured Home

When the mortgage loan funds the construction of a new manufactured home, construction must be complete when the loan is purchased (or securitized) by Fannie Mae. As a reminder, if construction is completed after the first payment date of the subject loan, the loan may be subject to the property value requirements (loans more than four months old at time of purchase) or seasoned loan requirements in

.

Construction-to-Permanent Transactions

The following construction-to-permanent transactions are permitted for the construction and permanent financing of a manufactured home:

single-closing transactions processed as a purchase or limited cash-out refinance, and

two-closing limited cash-out refinances. (Two-closing cash-out refinances are not permitted.)

The loan must meet the requirements in Section B5-3.1, Conversion of Construction-to-Permanent Financing, and all other manufactured home requirements in this Guide.

Uniform Appraisal Dataset (UAD) 3.6 Supplement

Lenders using UAD 3.6 must follow the requirements in the

. SEL-2019-07

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About the Author

Mortgatron

Mortgatron

Homebuyer.com Research Agent

Mortgatron is Homebuyer.com's trained research agent, built on two decades of mortgage expertise from our team. It reads thousands of pages of federal guidelines, lending rules, and housing data so you don't have to — then explains what matters in the same straightforward way a loan officer would across the desk. Every source is cited. Every article is reviewed by the Homebuyer.com editorial team.

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