Can I Build Tiny Home in Austin, TX? (2026)
Find out if you can build a tiny home in Austin, TX. Rules, permit requirements, costs, and next steps.
Tiny homes on permanent foundations are allowed in Austin, TX. Tiny homes on wheels are not permitted as permanent dwellings.
A tiny home is a small dwelling unit — typically under 400 sq ft — that can be built on a permanent foundation or on wheels. In Austin, TX, the rules differ significantly depending on whether the structure is on a permanent foundation (treated as a dwelling unit under building code) or on wheels (treated as a recreational vehicle under vehicle code). Tiny homes on permanent foundations must meet a minimum size of 150 sq ft in Austin.
Tiny Home Rules in Austin
Tiny Home Rules in Austin: Foundation-based tiny homes: Permitted. Tiny homes on wheels (THOWs): Not permitted as permanent dwelling — classified as recreational vehicle. Minimum size: 150 sq ft. Tiny homes on permanent foundations allowed subject to Austin Development Code standards. Minimum habitable room size 70 sqft per Texas Residential Code. Austin's HOME Ordinance (2023) allows 3 units on SF lots — tiny homes could fulfill one of those units. Tiny homes on wheels (THOWs) not permitted as permanent residences — Austin classifies them as recreational vehicles subject to vehicle code.
Costs & Fees
Building permit fees for tiny homes in Austin follow the same schedule as other new construction. Contact the Austin Development Services Department (DSD) at (512) 978-4000 for current fee information.
Next Steps
Next steps for building a tiny home in Austin: 1. Determine foundation vs. wheeled — the rules are fundamentally different. 2. For foundation tiny homes, obtain a building permit from the Austin Development Services Department (DSD). 3. For wheeled tiny homes, verify whether your property allows RV siting. 4. Check if your tiny home could qualify as an ADU on your property.
Austin Development Services Department (DSD)
Phone: (512) 978-4000
Website: https://www.austintexas.gov/development-services
Online Permits: https://abc.austintexas.gov/
Frequently Asked Questions
Can I build an ADU on my Austin property?
Yes. Austin allows secondary apartments (ADUs) on most residential lots. The unit can be up to 1,100 sqft or 0.15 FAR of lot area. No owner-occupancy requirement. With Austin's HOME Ordinance (2023), you can have up to 3 total units on most SF-zoned lots. Impervious cover limits and tree protection requirements may constrain placement.
What is the HOME Ordinance and how does it affect my property?
Austin's HOME (Home Options for Middle-Income Empowerment) Ordinance, passed in 2023 (Phase 1) and expanded in 2024 (Phase 2), allows up to 3 residential units on any single-family zoned lot in Austin. This means you can have a main house, an ADU, and a third unit — or a duplex plus a secondary apartment. Minimum lot size requirements were reduced and in some cases eliminated. This is one of the most significant zoning reforms in Austin's history.
Do I need a permit to remove a tree in Austin?
It depends on size. Trees with trunk diameters of 8 inches or more at 4.5 feet height (DBH) are 'Protected Trees' requiring an Austin permit to remove. Trees 19 inches or larger are 'Heritage Trees' — these cannot be removed except in cases of imminent public hazard (with variance approval). Austin's tree ordinance is one of the strictest in Texas and violations can result in significant fines.
Are short-term rentals (Airbnb) allowed in Austin?
Yes, with a license ($613/year). Austin has two STR types: Type 1 (owner-occupied) allows whole-unit rental without the owner present; Type 2 (non-owner-occupied) is limited to 3% of residential units per City Council district and banned in some areas. Austin collects a 9% Hotel Occupancy Tax (HOT) on STR rentals. Noise ordinance and maximum occupancy rules apply.
What are the impervious cover limits in Austin?
Impervious cover limits in Austin depend on your watershed zone and zoning district. Most SF zones allow 45% impervious cover on lots not in critical watershed areas. However, if your property is in the Barton Springs zone or other sensitive watersheds, limits drop to 25-40%. Impervious cover includes your house, garage, driveway, patio, pool, and any other hard surface. Austin Watershed Protection calculates this for each permit application.
Source: Austin Development Services Department (DSD) — Building Regulations. Last verified April 3, 2026. View source