Had this same issue this past year. I was referred to refererence HUD Book 4150.1
REV 1. When I replied, I added this to my report and again explained why I used comparables over the 12 month sale date.
The following information was found on the HUD website on the webpage labeled
" Valuation Analysis for Single Family One- to Four- Unit Dwellings (4150.2)" in regards to HUD manual 4150.1 REV-1 and HUD manual 4150.2 found in the transmittal area of the manual on the second page.http://www.HUD.gov/offices/adm/hudclips/handbooks/hsgh/4150.2/index.cfm
http://www.HUD.gov/offices/adm/hudclips/handbooks/hsgh/4150.2/41502trnHSGH.pdf
A new Handbook, 4150.2, Valuation Analysis for Home Mortgage
Insurance for Single Family One- to Four- Unit Dwellings. This
handbook replaces and supercedes most of the provisions of
Handbook 4150.1 REV-1, identified below under the heading of
"HANDBOOKS".
Found also in the 4150.2 manual in appendix D - PAGE 7 as follows:
http://www.HUD.gov/offices/adm/hudclips/handbooks/hsgh/4150.2/index.cfm
http://www.HUD.gov/offices/adm/hudclips/handbooks/hsgh/4150.2/41502appdHSGH.pdf
Appendix D – Page 7
No sales over one year old are permitted except as “additional comparable sales” and would be identified as comparable sale(s) 4, 5 or 6. Properties under contract may be also be submitted as additional comparable sales 4, 5 or 6 to support trends or value conclusions observed.
Appendix D - Page 6
Comparable Selection
At a minimum, comparable selection should be based on properties having the same or similar locational characteristics as well as physical characteristics which includes: style, age, size, utility and condition.