https://www.fanniemae.com/content/guide/selling/b4/1.2/03.html
Requirements for Existing Construction
When There are Incomplete Items or Conditions that Do Affect the Safety, Soundness, or Structural Integrity of the Property
When there are incomplete items or conditions that do affect the safety, soundness, or structural integrity of the property,
the property must be appraised subject to completion of the specific alterations or repairs. These items can include a partially completed addition or renovation, or physical deficiencies that could affect the safety, soundness, or structural integrity of the improvements, including but not limited to, cracks or settlement in the foundation, water seepage, active roof leaks,
curled or cupped roof shingles, or inadequate electrical service or plumbing fixtures. In such cases, the lender must obtain a certificate of completion from the appraiser before the mortgage is delivered to Fannie Mae. Although the original appraiser should complete any required certification of completion, the lender may use a substitute appraiser.
See
B4-1.2-02, Appraisal Age and Use Requirements, for certifications completed by substitute appraisers.
The certification does not need to include photographs of the property unless those that accompanied the original appraisal report are no longer representative of the completed property.