How Multifamily Approvals Work in Austin

Austin multifamily development can follow several separate routes depending on the site. Texas Senate Bill 840 opened an administrative path on commercial zoned land in September 2025, the city's own HOME initiative changed what a single family lot can hold, and the Affordability Unlocked and Vertical Mixed Use programs trade affordability for added height and density on land that already permits it.

Texas Senate Bill 840 in Austin

Senate Bill 840, codified at Texas Local Government Code Chapter 218, took effect September 1, 2025, and applies to Austin as a municipality of more than 150,000 residents in a county of more than 300,000 (Section 218.002). Where an Austin parcel is zoned office, commercial, retail, warehouse or mixed use, the city must approve a qualifying multifamily or mixed use residential project administratively, at a density and height no lower than its own existing maximums, or the law's own floors, with setbacks and parking capped (Section 218.101, 218.102). In response, Austin's City Council has moved to set new maximum heights in zones such as the Central Business District and has directed staff to examine how the law interacts with the city's density bonus programs.

The HOME initiative

Austin's Home Options for Mobility and Equity (HOME) amendments revised the Land Development Code in two phases. Phase 1, adopted December 7, 2023 and effective February 5, 2024, allows up to 3 residential units on most lots zoned SF-1 through SF-3, removed the cap on unrelated adults per unit, and revised duplex standards. Phase 2, adopted May 16, 2024, created a small lot single family use, cutting the minimum lot size for one unit from 5,750 to 1,800 square feet, effective August 16, 2024 for most parcels and November 16, 2024 citywide. Neither phase changes multifamily zoned land directly; both raise the unit count a previously single family lot can hold.

Affordability Unlocked and Vertical Mixed Use

The Affordability Unlocked program, set out in Land Development Code Section 25-1, Article 15, Division 4, grants waivers of height, density, parking, compatibility and lot size standards to a rental development that reserves at least 50 percent of its units as affordable, with units averaging 60 percent of median family income or below for 40 years, or an ownership development averaging 80 percent median family income or below for 99 years. A project needs a Prequalification Letter from Austin Housing before it can submit a site plan or building permit application. The Vertical Mixed Use (VMU) combining district, created under Land Development Code Chapter 25-2, Subchapter E, pairs ground floor commercial space with residential units above along corridors mapped with the -V designation, with its own optional affordability bonus for added height and reduced parking.

Site plan review

A multifamily development beyond a duplex needs a site plan, reviewed under Land Development Code Chapter 25-5. Most multifamily site plans are approved administratively by Austin Development Services staff, with up to 10 city disciplines reviewing the application at once; a public hearing before the Land Use Commission is required only where the project includes a conditional use or sits on a Hill Country Roadway. Once the zoning already permits the proposed use, the site plan's review and release is the city's main checkpoint before a building permit.

Questions

Does SB 840 replace Austin's own zoning process?

No. It applies only where land is already zoned office, commercial, retail, warehouse or mixed use and a project meets the law's density, height, setback and parking terms (Tex. Loc. Gov't Code Section 218.101, 218.102); other sites still follow Austin's standard zoning and site plan process.

What affordability share does Affordability Unlocked require?

At least 50 percent of a development's units, serving renters averaging 60 percent of median family income or below for 40 years, or owners averaging 80 percent median family income or below for 99 years.

Did the HOME initiative change multifamily zoning in Austin?

Not directly. Phase 1 and Phase 2 raised the unit count allowed on single family zoned lots; multifamily zoned land follows its own base district standards, plus VMU or Affordability Unlocked where elected.

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