Michael Tipton
Senior Member
- Joined
- Sep 25, 2005
- Professional Status
- Certified Residential Appraiser
- State
- Florida
At least FHA has attempted to clarify the issue. Appendix D: Valuation Protocol includes the following:
Accessory Unit/Accessory Dwelling Unit
The accessory unit is defined as a habitual living unit added to, created within, or detached from a single-family dwelling that provides the basic requirements for living, sleeping, eating, cooking, and sanitation.
Accessory Dwelling Units are commonly understood to be a separate additional unit, including separate kitchen, sleeping, and bathroom facilities, attached or detached from the primary unit and may or may not have separate means of ingress or egress.
Attached units, contained within a single-family home, known as "mother-in-law apartments," are the most common type of accessory dwelling unit. Accessory units usually involve the renovation of a garage, basement, or small addition to a single-family home.
FHA Criteria
"Accessory dwelling unit" means a subordinate dwelling unit may or may not be incorporated within, or detached from a single-family structure. Accessory units may not be subdivided or otherwise segregated in ownership from the primary residential structure.
Some accessory units may predate the adoption of local zoning ordinances and may therefore be classified as legal nonconforming units.
FNMA and Freddie, when will you provide a definition?
Accessory Unit/Accessory Dwelling Unit
The accessory unit is defined as a habitual living unit added to, created within, or detached from a single-family dwelling that provides the basic requirements for living, sleeping, eating, cooking, and sanitation.
Accessory Dwelling Units are commonly understood to be a separate additional unit, including separate kitchen, sleeping, and bathroom facilities, attached or detached from the primary unit and may or may not have separate means of ingress or egress.
Attached units, contained within a single-family home, known as "mother-in-law apartments," are the most common type of accessory dwelling unit. Accessory units usually involve the renovation of a garage, basement, or small addition to a single-family home.
FHA Criteria
"Accessory dwelling unit" means a subordinate dwelling unit may or may not be incorporated within, or detached from a single-family structure. Accessory units may not be subdivided or otherwise segregated in ownership from the primary residential structure.
Some accessory units may predate the adoption of local zoning ordinances and may therefore be classified as legal nonconforming units.
FNMA and Freddie, when will you provide a definition?

