Austin Development Services describes an Additional Dwelling Unit (ADU) as a separate dwelling on the same property as a single-family home. The City’s current online screening page says an ADU may be built on a residential property when its stated minimum requirements are met. This is a preliminary screen; it does not decide a particular parcel or replace review of the Land Development Code.

Start with the City’s screening conditions

The City lists these checks:

  • The property is zoned SF-1, SF-2, or SF-3, as verified through Austin’s Property Profile.
  • The lot has at least 5,750 square feet of area.
  • The required size for the additional dwelling depends on the zoning district and its location within Austin.
  • Each new dwelling needs a unique address or building number, which should be confirmed with Address Management Services before the residential building-permit application.

The City’s definition of a dwelling unit includes habitable space, a full bathroom, and permanent cooking facilities. If a proposed structure does not meet that definition, ask Residential Zoning staff how it is classified rather than assuming it is exempt from dwelling-unit rules.

Treat the screen as a first check, not clearance

Use the official property record to confirm the parcel’s zone and area. Then check the applicable code and other site conditions. The City notes that additional Land Development Code requirements apply and that deed restrictions or restrictive covenants may affect a project. Fire separation and other building-code questions are separate from zoning; the City’s page directs technical questions to Building Code staff.

If the property does not meet the listed screen, Austin Development Services recommends contacting Residential Zoning staff to discuss the site’s options. Do not infer that a neighboring ADU, an online listing, or the parcel’s mailing address establishes the same result for this property.

What this page does not establish

The screening page does not identify an individual lot’s official area, current zoning designation, applicable exceptions, covenants, or final code compliance. It also does not promise approval. Check the current Property Profile, Land Development Code, address requirements, and any applicable technical or private restrictions with the City before choosing a project design.