It is commonly designed to host aging relatives, long-stay friends, or as an income-producing rental unit.

What Is an Accessory Dwelling Unit?

It is a separate additional living unit, including kitchen, sleeping, and bathroom facilities.

granny flat

Design byMarie Flanigan Interiors/ Photo by Julie Soefer

These structures are generally more budget-friendly and sustainable since they rely on existing architecture rather than building from scratch.

They generally take less time to renovate than a new build.

What Is an ADU?

granny flat bathroom

Kanok Sulaiman / Getty Images

The Complete Guide to Accessory Dwelling Units.

basement kitchenette

Velinda Hellen forEmily Henderson Design/ Photo by Sara Tramp

finished basement granny flat

imaginima / Getty Images

tiny house granny flat

Mireya Acierto / Getty Images