Is an occupied property that is less than one year old treated as new or existing construction?

FHA treats the sale of an occupied Property that has been completed less than one year from the issuance of the Certificate of Occupancy or equivalent as an existing Property.
For FHA policy information see Handbook 4000.1 II.A.8.i.i. at

All policy information contained in this knowledge base article is based upon the referenced HUD policy document. Any lending or insuring decisions should adhere to the specific information contained in that underlying policy document.

Topic Number: KA-03650