What is a twinplex and duplex?

A duplex is a residential building divided into two separate living units, typically sharing a common wall, designed for two families or households. A twinplex, on the other hand, refers to a similar structure but may imply a slightly different design or configuration, often featuring two units side by side that can be more similar in layout. Both types of properties offer the benefits of shared walls for energy efficiency and potentially lower living costs, but they differ mainly in their design and terminology.