Selling Guide

Published December 16, 2020

For best results, pose your search like a question.

Guide Resources

For a comprehensive list of resources such as forms, announcements, lender letters, notices and more.

Visit Selling and Servicing Guide Communications and Forms

Customers Recommend Ask Poli

AskPoli

If you have additional questions, Fannie Mae customers can visit Ask Poli to get information from other Fannie Mae published sources.

Launch Ask Poli  

Download PDF Guide

You can also download the printable 1,200+ page PDF, which include links.

Download Now

What are the appraisal requirements for unique property types?

Unique Housing Types

In the appraisal and appraisal report review processes, special consideration must be given to properties that represent unique housing for the subject neighborhood. Mortgages secured by unique or nontraditional types of housing, including, but not limited to, earth houses, geodesic domes, and log houses, are eligible for delivery to Fannie Mae provided the appraiser has adequate information to develop a reliable opinion of market value. It is not necessary for one or more of the comparable sales to be of the same design and appeal as the property that is being appraised, although appraisal accuracy is enhanced by using comparable sales that are the most similar to the subject property. On a case-by-case basis, both the appraiser and the underwriter must independently determine whether there is sufficient information available to develop a reliable opinion of market value. This will depend on the extent of the differences between the special or unique property and the more traditional types of houses in the neighborhood and the number of such properties that have already been sold in the neighborhood.

When appraising unique properties,

  • if the appraiser cannot locate recent comparable sales of the same design and appeal, but is able to determine sound adjustments for the differences between the comparables that are available and the subject property and demonstrate the marketability of the property based on older comparable sales, comparable sales in competing neighborhoods, the existence of similar properties in the market area, and any other reliable market data, the property is acceptable as security for a mortgage deliverable to Fannie Mae;
  • if the appraiser is not able to find any evidence of market acceptance, and the characteristics of the property are so significantly different that he or she cannot establish a reliable opinion of market value, the property is not acceptable as security for a mortgage deliverable to Fannie Mae. 

Fannie Mae does not specify minimum size or living area requirements for properties with the exception of manufactured housing (see B4-1.4-01, Factory-Built Housing: Manufactured Housing). There should be comparables of similar size to the subject property to support the general acceptability of a particular property type.

For additional information, see B4-1.3-05, Improvements Section of the Appraisal Report.

Have You Tried Ask Poli?

Poli knows. Just ask.

Ask Poli features exclusive Q&As and
more—plus official Selling & Servicing
Guide
content.

Try Ask Poli

Related Articles


AskPoli

Customers Recommend Ask Poli

If you have additional questions, Fannie Mae customers can visit Ask Poli to get information from other Fannie Mae published sources.

Guide Resources

For a comprehensive list of resources such as access forms, announcements, lender letters, notices and more.

Visit Selling and Servicing Guide Communications and Forms

X
Having Issues with Seeing this Page Correctly?

Use Firefox or Chrome   How to do a hard refresh in Internet Explorer
We recommend that you use the latest version of FireFox or Chrome.

Download Firefox
Download Chrome
  A hard refresh will clear the browsers cache for a specific page and force the most recent version of a page.
    Hold the Ctrl key and press the F5 key.
     

Email Us
If you still have Technical Support questions, feel free to emailAsk_Poli@fanniemae.com.