Fannie Mae Manufactured Home Guidelines: LTV Limits and MH Advantage

Fannie Mae will buy a mortgage on a manufactured home only when both the home and the loan clear a specific set of requirements: the home must be built to the HUD Code, sit on a permanent foundation, and be titled as real estate, and the loan must fit within set loan-to-value, occupancy, and underwriting limits. The Fannie Mae manufactured home guidelines are strict on every one of these points, and a home that misses even one is ineligible for delivery on the secondary market. Below is what qualifies, what doesn’t, and where the MH Advantage program changes the math.

What Qualifies as a Manufactured Home

Fannie Mae’s definition is a checklist, and every item is mandatory. The dwelling must be:

At least 400 square feet in gross living area and at least 12 feet wide;
Built to the federal Manufactured Home Construction and Safety Standards (the HUD Code), which took effect June 16, 1976;
Constructed on a permanent chassis;
Installed on a permanent foundation system; and
Titled as real estate in the jurisdiction where it sits.¹

Homes built before June 15, 1976, sometimes still called “mobile homes,” do not comply with the HUD Code and cannot qualify.² One rule that used to disqualify older units no longer applies: as of December 14, 2022, Fannie Mae dropped the requirement that the manufacture date on the HUD Data Plate be within ten years for single-width homes.¹

Modular homes are a separate category. They are built in factory sections but conform to state, local, and regional building codes rather than the HUD Code. Off-frame modulars, which lack a permanent chassis, are treated by Fannie Mae as standard single-family detached homes and fall outside these guidelines entirely. On-frame modulars have a chassis but still don’t meet the HUD Code, so they are delivered under different rules than manufactured homes.²

Foundation, Installation, and Title

The home must sit on a permanent foundation that meets three overlapping standards at once: the manufacturer’s specifications, all applicable state and local building codes, and HUD’s Permanent Foundations Guide for Manufactured Housing. During installation, the towing hitch, wheels, and axles must be removed so the home takes on the characteristics of a site-built dwelling.³

An engineer certification is required. For homes installed on or after October 20, 2008, the lender needs either a certification from a licensed professional engineer confirming attachment to a permanent foundation per the manufacturer’s requirements, or a copy of the state’s Certification of Installation (or comparable form). For homes installed before that date, only the licensed-engineer certification is accepted.³

The home must also be legally classified as real property, not personal property. Manufactured homes often begin life titled like vehicles, with a certificate of title from a state motor vehicle agency. Before a mortgage can be delivered, that personal-property title has to be converted. The process varies by state: in many, the certificate must be obtained and then formally surrendered or canceled; in states that don’t issue a certificate for new homes intended for permanent installation, an affidavit of affixture is filed with the appropriate state office.

Once the personal-property title is retired, the lender records a mortgage on the real property. That mortgage must describe the home by make, model, and vehicle identification number (VIN), and must state that the home “is permanently affixed and attached to the land and is part of the real property.” Lenders must also obtain a manufactured housing endorsement to the title insurance policy, specifically ALTA Endorsement 7, 7.1, or 7.2, or a local equivalent, confirming the home is included in the policy’s definition of “Land.”⁴ Homes titled only as personal property (chattel) are not eligible for purchase by Fannie Mae.⁵

LTV and Occupancy Limits for Standard Manufactured Housing

Fannie Mae caps loan-to-value (LTV) and combined loan-to-value (CLTV) ratios by transaction type and occupancy.

Principal residence, purchase or limited cash-out refinance: up to 95% LTV/CLTV for a one-unit property. Homes that are not MH Advantage may not exceed 95%.⁶
Principal residence, cash-out refinance: single-width homes are not eligible; multi-width homes are capped at 65% LTV/CLTV.¹
Second home (multi-width only): up to 90% LTV/CLTV for purchase or limited cash-out refinance.¹
Investment property: not eligible.¹

Single-width homes carry the tightest limits. Under the standard program, transactions involving single-width homes are restricted to principal-residence purchases and limited cash-out refinances.⁶

MH Advantage: Higher LTVs and Waived Pricing Adjustment

MH Advantage is Fannie Mae’s enhanced track for manufactured homes designed to look and perform more like site-built houses. To qualify, a home must meet all the standard requirements plus additional construction, architectural, and energy efficiency standards, such as distinctive roof treatments, lower-profile foundations, and durable exterior siding. The manufacturer must affix an MH Advantage sticker (or a Freddie Mac CHOICEHome label) to the unit under an agreement with Fannie Mae.¹

The financing terms improve accordingly:

Principal residence, purchase or limited cash-out refinance: up to 97% LTV/CLTV on a fixed-rate mortgage, 95% on an adjustable-rate mortgage. With eligible Community Seconds financing, the CLTV can reach 105%.¹
Principal residence, cash-out refinance: up to 65% LTV/CLTV, available for both single-width and multi-width homes (unlike the standard program, which bars single-width cash-out refinances entirely).¹
Second home: up to 90% LTV/CLTV.¹

MH Advantage also allows financed mortgage insurance up to 97% CLTV, compared to 95% under the standard program.¹ Land-tenure rules are tighter, though. According to Fannie Mae’s FDIC-published overview, MH Advantage homes on leased land or in community land trusts are not eligible for MH Advantage financing, and single-wide MH Advantage homes are only eligible when located in an approved subdivision, co-op, condominium, or planned unit development.⁷

Underwriting, Loan Terms, and Pricing

All manufactured housing loans may carry terms of up to 30 years and may be fixed-rate or adjustable-rate. Temporary interest rate buydowns are allowed for both standard and MH Advantage loans, but not on cash-out refinances or investment properties.¹

Every manufactured housing loan must be run through Desktop Underwriter (DU), Fannie Mae’s automated underwriting system. Manual underwriting is not an option. Because DU applies its own risk assessment, the standard manual-underwriting debt-to-income thresholds and reserve tables do not directly govern these loans; DU makes the call based on the full borrower and loan profile.⁶ For MH Advantage loans, the construction method in DU is set to “Other” rather than “Manufactured,” and the MH Advantage designation is selected.¹

Standard manufactured housing loans carry a 0.50% Loan-Level Price Adjustment (LLPA), an added cost reflecting the higher perceived risk of the collateral. MH Advantage loans waive this LLPA when the lender uses Special Feature Code (SFC) 859 at delivery. At delivery, the construction method field is set to “Manufactured” for standard loans or “Other” for MH Advantage, and the home’s width is reported as “SingleWide” or “MultiWide.” SFC 235 is required for multi-width, SFC 791 and 235 for single-width, and SFC 859 (in addition to the width codes) for MH Advantage pricing.¹

Appraisal Rules

For a standard manufactured home, the appraiser must use Form 1004C (Manufactured Home Appraisal Report) and include at least two comparable sales of similar manufactured homes. A third comparable may be a site-built or modular home.¹

For MH Advantage properties, the comparable hierarchy shifts. Appraisers first look for other MH Advantage or CHOICEHome properties. If fewer than three such sales exist, the appraiser supplements with the “best and most appropriate” sales, which must include at least two site-built homes.¹

Regardless of program, the appraisal report must include photographs of the HUD Data Plate and HUD Certification Labels, plus photos of the MH Advantage sticker or CHOICEHome label when applicable. Driveways, sidewalks, and any detached structures on the site must also be photographed. Lenders are expected to give the appraiser a checklist of home details and manufacturer information before the inspection.⁸

Leased Land and Project Requirements

Manufactured homes on leased land can qualify under the standard program, with one clear condition: the ground lease must extend for at least five years beyond the maturity date of the mortgage being delivered to Fannie Mae. Manufactured homes located in a condominium project or planned unit development must have Project Eligibility Review Service (PERS) approval.⁹ MH Advantage, as noted above, does not permit leased-land or community-land-trust arrangements at all.⁷

1
Fannie Mae. Manufactured Housing Product Matrix
2
Fannie Mae. Factory-Built Housing Overview
3
HomeBridge Wholesale. Manufactured Housing Overview
4
Fannie Mae. Titling Manufactured Homes as Real Property
5
FHFA. Fannie Mae and Freddie Mac Support Manufactured Housing
6
Fannie Mae. Eligibility Matrix
7
FDIC. Fannie Mae MH Advantage Overview
8
Fannie Mae. Appraising Manufactured Homes
9
Fannie Mae. Selling Guide Eligibility Requirements