This Act may be cited as the “Property Improvement and Manufactured Housing Loan Modernization Act of 2026”.

(a) In general.—Section 2 of the National Housing Act (12 U.S.C. 1703) is amended—

(1) in subsection (a), by inserting “construction of additional or accessory dwelling units, as defined by the Secretary,” after “improvements,”; and

(2) in subsection (b)—

(A) in paragraph (1)—

(i) by striking subparagraph (A) and inserting the following new subparagraph:

“(A) $75,000 if made for the purpose of financing alterations, repairs and improvements upon or in connection with an existing single-family structure, including a manufactured home;”;

(ii) in subparagraph (B)—

(I) by striking “$60,000” and inserting “$150,000”;

(II) by striking “$12,000” and inserting “$37,500”; and

(III) by striking “an apartment house or”;

(iii) by striking subparagraphs (C) and (D) and inserting the following:

“(C) (i) $106,405 if made for the purpose of financing the purchase of a single-section manufactured home; and

“(ii) $195,322 if made for the purpose of financing the purchase of a multi-section manufactured home;

“(D) (i) $149,782 if made for the purpose of financing the purchase of a single-section manufactured home and a suitably developed lot on which to place the home; and

“(ii) $238,699 if made for the purpose of financing the purchase of a multi-section manufactured home and a suitably developed lot on which to place the home;”;

(iv) in subparagraph (E)—

(I) by striking “$23,226” and inserting “$43,377”; and

(II) by striking the period at the end and inserting a semicolon;

(v) in subparagraph (F), by striking “and” at the end;

(vi) in subparagraph (G), by striking the period at the end and inserting “; and”; and

(vii) by inserting after subparagraph (G) the following:

“(H) such principal amount as the Secretary may prescribe if made for the purpose of financing the construction of an accessory dwelling unit.”; and

(viii) in the matter preceding paragraph (2)—

(I) by striking “regulation” and inserting “notice”;

(II) by striking “increase” and inserting “set”;

(III) by striking “(ii), (C), (D), and (E)” and inserting “through (H)”;

(IV) by inserting “, or as necessary to achieve the goals of the Federal Housing Administration, periodically reset the dollar amount limitations in subparagraphs (A) through (H) based on justification and methodology set forth in advance by regulation” before the period at the end; and

(V) by adjusting the margins appropriately;

(B) in paragraph (3), by striking “exceeds—” and all that follows through the period at the end and inserting “exceeds such period of time as determined by the Secretary, not to exceed 30 years.”;

(C) by striking paragraph (9) and inserting the following:

“(9) Annual indexing of certain dollar amount limitations.—The Secretary shall develop or choose 1 or more methods of indexing in order to annually set the loan limits established in paragraph (1), based on data the Secretary determines is appropriate for purposes of this section.”; and

(D) in paragraph (11), by striking “lease—” and all that follows through the period at the end and inserting “unless such lease meets the terms and conditions established by the Secretary”.

(b) Deadline for development or choice of new index; interim index.—

(1) DEADLINE FOR DEVELOPMENT OR CHOICE OF NEW INDEX.—Not later than 1 year after the date of enactment of this Act, the Secretary of Housing and Urban Development shall develop or choose 1 or more methods of indexing as required under section 2(b)(9) of the National Housing Act (12 U.S.C. 1703(b)(9)), as amended by subsection (a) of this section.

(2) INTERIM INDEX.—During the period beginning on the date of enactment of this Act and ending on the date on which the Secretary of Housing and Urban Development develops or chooses 1 or more methods of indexing as required under section 2(b)(9) of the National Housing Act (12 U.S.C. 1703(b)(9)), as amended by subsection (a) of this section, the method of indexing established by the Secretary under that section before the date of enactment of this Act shall apply.

(a) Definitions.—In this section:

(1) OFF-SITE CONSTRUCTION HOUSING.—The term “off-site construction housing” includes manufactured homes and modular homes.

(2) MANUFACTURED HOME.—The term “manufactured home” means any home constructed in accordance with the construction and safety standards established under the National Manufactured Housing Construction and Safety Standards Act of 1974 (42 U.S.C. 5401 et seq.).

(3) MODULAR HOME.—The term “modular home” means a home that is constructed in a factory in 1 or more modules, each of which meets applicable State and local building codes of the area in which the home will be located, and that are transported to the home building site, installed on foundations, and completed.

(b) Study.—The Secretary of Housing and Urban Development shall conduct a study and submit to Congress a report on the cost effectiveness of off-site construction housing, that includes—

(1) an analysis of the advantages and the impact of centralization in a factory and transportation to a construction site on cost, precision, and materials waste;

(2) the extent to which off-site construction housing meets housing quality standards under the National Standards for the Physical Inspection of Real Estate, or other standards as the Secretary may prescribe, compared to the extent for site-built homes, for such standards;

(3) the expected replacement and maintenance costs over the first 40 years of life of off-site construction homes compared to those costs for site-built homes; and

(4) opportunities for use beyond single-family housing, such as applications in accessory dwelling units, two- to four-unit housing, and large multifamily housing.