If you review your appraisal from your home purchase, refinance or similar, you may see homes that your house is compared to. A way for nationwide appraisers to use common jargon, a Uniform Appraisal Dataset (UAD) was created. Q6 – Q1 are quality rating that span from very basic to the most ornately built custom home. Similar to C6-C1. This is a condition rating that rates a home to completely demolished to brand new in regards to condition.
There are times where one appraiser may say your home is a C2 and another one calls it a C3. To rectify this, Fannie Mae’s Collaborative Underwriter (CU) ensures that if an appraiser uses one home as a specific rating that it will remain that rating. Ratings can fluctuate between appraisers because its based on their opinion in how your home pars to the UAD Rating Glossary. As you can see, there is some interpretations that can be made which is why there is differences in ratings. All these ratings are being stored by CU and ensuring that appraisers use that condition again when they use that specific comp listing on another appraisal.  For this reason, appraisers need to make sure they properly rate a home when comparing to the subject because they will be required to use the same rating on a future appraisal.
For more information about Fanny Mae’s Collaborative Underwriter visit their website.
