AustinADU

Can You Build an ADU on Your Property?

Instant zoning, lot size & eligibility check for Austin metro properties

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Check Zoning Instantly

Verify your property is residential zoning and eligible under HOME rules.

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Lot Size Analysis

We verify if your lot meets the 2,500 sqft minimum for multiple units.

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Permit History

See recent ADU permits in your neighborhood to see what neighbors are building.

The Complete Guide to Austin ADU Rules (2026)

Austin's housing rules have changed dramatically. The "HOME Initiative" has relaxed restrictions, making it easier than ever to add an Accessory Dwelling Unit (ADU) to your property.

Key Changes in Phase 1 & 2

Now Allowed

  • Up to 3 units on any residential lot
  • Unlimited ADU square footage (up to 40% coverage)
  • No parking required for ADUs
  • ADUs can be 2-story (up to 35ft height)
  • Small lot amnesty (build on 1,800 sqft lots)

Still Restricted

  • Maximum 40% building coverage still applies
  • Maximum 45% impervious cover still applies
  • Protected trees must be preserved
  • Short-term rentals (Type 2) are still capped

Why Build an ADU in Austin?

With Austin's median home price remaining high, ADUs offer a way to:

  1. Generate Rental Income: A 2/1 ADU in 78704 or 78702 can rent for $2,000+/month.
  2. Housing Flexibility: Perfect for aging parents ("granny flats") or adult children.
  3. Increase Property Value: Appraisers are beginning to value ADUs more accurately as independent living units.

How to Get Started

1. Check Eligibility: Use the search tool above to verify your zoning and lot size.
2. Survey & Design: Hire a surveyor to map trees and impervious cover.
3. Financing: Explore HELOCs, renovation loans, or cash-out refinances.
4. Permitting: Submit plans to the City of Austin Development Services Department (DSD).

ADU Rules by Austin Zip Code

Explore ADU permit activity and eligibility in popular Austin neighborhoods:

ADU Rules by Metro Area City

Explore ADU eligibility in cities across the greater Austin metro area:

Latest ADU Guides

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Frequently Asked Questions

What is the Austin HOME Initiative?

The HOME (Home Options for Mobility and Equity) Initiative is a series of code amendments adopted by Austin City Council starting December 2023. It allows property owners to build up to 3 housing units on single-family zoned lots, removes parking requirements, and relaxes other restrictions to increase housing supply.

Can I build an ADU on my Austin property?

Under the HOME Initiative, any residential lot in Austin with at least 2,500 sqft can have up to 3 units. Key requirements include compliance with building coverage (40% max) and impervious cover (45% max) limits.

How big can an ADU be in Austin?

Under the HOME Initiative, there is no longer a size limit for ADUs. Previously, ADUs were capped at 1,100 sqft. Now, size is only limited by building coverage (40% max) and setback requirements.

Do I need parking for an ADU in Austin?

No. The HOME Initiative removed parking requirements for additional units on single-family lots. You can build up to 3 units without providing any off-street parking.

What is the minimum lot size for an ADU in Austin?

The minimum lot size for a property with multiple units is 2,500 sqft. However, HOME Phase 2 (May 2024) also allows single-family homes on lots as small as 1,800 sqft.