Types of Duplex Houses

A duplex is a structure that comprises two separate family units. Duplexes can be attractive because, though they cost more than a single-family dwelling, the net payment for an owner-occupant after rental income can be cheaper than buying a single-family unit.

Single-story duplexes have two one-story units side-by-side, both on the ground floor. This type of duplex, which does not have stairs to climb, may appeal to families with young children and senior citizens.

This duplex design separates the units by placing them each on a different floor, which helps it accommodate a more diverse field of tenants. Some people prefer to sleep with a window open, but are uncomfortable doing so on the first floor for security reasons; they would be attracted to the upper level. The lower level would be attractive to renters who prefer single-story duplexes -- those who would prefer not to use stairs.

The two-story, side-by-side duplexes have two, two-level units sharing a common wall. Privacy and footprint size are two advantages of this style of duplex. This style of construction separates the private living spaces -- bedrooms and bathrooms -- from the common areas. It also is useful on smaller lots, offering extra square footage by building up instead of out.