QUADRAPLEX
Any building designed to accommodate four families.

QUALIFYING RATIOS
Two ratios used in determining credit worthiness for a mortgage loan. One is the ratio of a borrowers monthly housing costs to monthly income. The other is a ratio of all monthly debt to monthly income.

QUITCLAIM DEED
A legal document which transfers any ownership an individual has in a piece of property. Often used when the amount of ownership is not known or is unclear.