7 C.F.R. § 3555.202
(b) Existing dwellings. Existing dwellings are considered to meet the following criteria when inspected and certified as meeting HUD requirements for one-to-four unit dwellings in accordance with Agency guidelines:
(c) Escrow account for exterior or interior development. This paragraph does not apply if the development is related to a “combination construction and permanent loan” under § 3555.101(c). If a dwelling is complete with the exception of interior or exterior development work, Rural Development may issue the Loan Note Guarantee on the loan if the following conditions are met:
(4) The builder or a licensed contractor has executed a contract providing for completion of the planned development within 180 days of loan closing. If the borrower will be completing the planned development on an existing dwelling without the services of a contractor, the requirement for an executed contract is waived when all of the following conditions are met: