It's a reportable purchase loan. To qualify as "temporary" you must have 2 phases.
Here's an excerpt from our training manual on this topic:
Do not report loans or lines for temporary financing. [§1003.3(c)(3)] A loan or line of credit is considered temporary financing and excluded… if the loan or line of credit is designed to be replaced by separate permanent financing (i.e. two-phase financing) extended by any financial institution to the same borrower at a later time. [Commentary to §1003.3(c)(3) #1]
Lender A extends credit to a borrower to finance construction of a dwelling (i.e. the construction phase). The borrower will obtain a new extension of credit for permanent financing for the dwelling, either from Lender A or from another lender… The initial construction loan is excluded as temporary financing… because the construction loan has been designed to be replaced by permanent financing. [Commentary to §1003.3(c)(3) #1(ii)] Construction to permanent (one closing) and construction only loans not designed to be replaced by separate permanent financing are not considered to be temporary financing and must be reported as applicable. [Commentary to §1003.3(c)(3) #1(iv)]