Environmental Rules in Austin, TX (2026)
9 verified environmental rules for Austin, Texas, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Austin puts the cost of handling stormwater on the property owner. Anyone developing land must convey all stormwater flowing through the site, including runoff directed there by upstream property, dedicate drainage easements to the 100-year floodplain, and maintain detention basins under Watershed Protection Department standards.
Austin Stormwater Drainage Rules
Some RestrictionsAustin City Code Sec. 25-7-151; Sec. 25-7-153(E)
(A)The owner or developer of property to be developed is responsible for the conveyance of all stormwater flowing through the property, including stormwater that:(1)is directed to the property by other developed property; or(2)naturally flows through the property because of the topography...(E)The City shall inspect each commercial basin that is not a subsurface basin at least once every three ...
Erosion Control
Austin City Code Title 25 and the Drainage Criteria Manual regulate all grading and drainage activities. A grading permit is required for any land-disturbing activity exceeding specific thresholds. The city requires drainage plans showing pre- and post-development runoff calculations and mandates that development not increase flooding on adjacent properties. Cut and fill operations must comply with geotechnical requirements especially in the Balcones Fault Zone.
Austin Grading & Drainage Regulations
Some RestrictionsTex. Loc. Gov't Code Sec. 232.003
Sec. 232.003. SUBDIVISION REQUIREMENTS. By an order adopted and entered in the minutes of the commissioners court... the commissioners court may: ... (5) adopt reasonable specifications to provide adequate drainage for each street or road in a subdivision in accordance with standard engineering practices; ... (8) adopt reasonable specifications that provide for drainage in the subdivision to: (...
Flood Zones
Austin participates in the National Flood Insurance Program and maintains strict floodplain regulations under City Code Title 25 and the Drainage Criteria Manual. The city has over 130 miles of creeks including major flood-prone corridors along Onion Creek, Shoal Creek, Williamson Creek, and Barton Creek. Development in the 100-year floodplain is prohibited or heavily restricted. The Watershed Protection Department maintains flood early warning systems and buyout programs for repeatedly flooded properties.
Austin Flood Zone Regulations & Building Rules
Significant RestrictionsAustin Watershed Protection - Floodplain Management and Regulations; Floodplain Remapping (Atlas 14 study)
Austin Watershed Protection protects lives, property and the environment of our community by reducing the impact of flooding, erosion and water pollution. Originally called the Drainage Utility, Austin Watershed Protection was established in 1996 to manage the City's creeks, drainage systems and water quality programs. [...] Floodplain Remapping - The City of Austin, Travis County and other Cen...
Boat Dock Permits
Building, modifying, or extending a dock, bulkhead, or shoreline access on Lake Austin, Lady Bird Lake, or Lake Walter E. Long requires a site plan and building permit under Sec. 25-2-1173, and Sec. 25-2-1176 caps a residential dock at a 30-foot lake extension, a 10-foot side setback, and 30 feet of height.
Austin Lake Dock Permits and Standards
Some RestrictionsAustin City Code Sec. 25-2-1173, 25-2-1176
(A)A person may not modify a shoreline or construct or modify a dock, bulkhead, or shoreline access unless the person first obtains a site plan, except as otherwise allowed under Section 25-5-2 (Site Plan Exemptions), and building permit and pays the applicable fees established by ordinance...(C)If a permit is required under this section and is not obtained before construction begins, the requi...
Defensible Space
Every structure in Austin's mapped wildland-urban interface must clear a fuel-modification buffer set by its Proximity Zone, from 30 feet in Zone C up to 100 feet in Zone A, plus a five-foot noncombustible Ember Ignition Zone hugging the building itself, under Sections 603.2 and 603.2.1 of the local Wildland-Urban Interface Code.
Austin Wildfire Defensible Space Requirements
Significant RestrictionsAustin City Code Sec. 25-12-183 (2024 Int'l Wildland-Urban Interface Code Secs. 603.2, 603.2.1)
603.2 Fuel modification. When required, buildings or structures within the wildland-urban interface shall comply with the fuel modification distances contained in Table 603.2. For all purposes the fuel modification distance shall be not less than 30 feet (9144 mm) or to the lot line, whichever is less. ... Table 603.2 Required Defensible Space: Proximity Zone C 30 feet; Proximity Zone B 50 feet...
Vehicle Idling Restrictions
Austin City Code Sec. 6-1-51 prohibits a motor vehicle's primary propulsion engine from idling more than five consecutive minutes when the vehicle is not in motion, citywide within Austin's zoning jurisdiction. Thirteen exemptions in Sec. 6-1-52 keep the rule aimed at heavy trucks and buses, since any vehicle 14,000 pounds or less is exempt outright. Violators face a Class C misdemeanor.
Austin Bans Vehicle Idling Over 5 Minutes
Some RestrictionsAustin City Code Sec. 6-1-51
§ 6-1-51 - IDLING PROHIBITED. No person shall cause, suffer, allow, or permit the primary propulsion engine of a motor vehicle to idle for more than five consecutive minutes when the motor vehicle is not in motion. ... § 6-1-52 - EXEMPTIONS. Section 6-1-51 (Idling Prohibited) does not apply to: (1)a motor vehicle that has a gross vehicle weight rating of 14,000 pounds or less; ... (9)the primar...
Climate Emergency Mobilization
Austin City Council adopted the Climate Equity Plan in 2021, committing the city to net-zero community greenhouse gas emissions by 2040, accompanied by sector goals for electricity, transportation, buildings, and consumption alongside equity outcome metrics.
Austin Climate Equity Plan Targets Net Zero by 2040
Some RestrictionsAustin Climate Equity Plan (Adopted September 2021 by City Council) - 2040 Net-Zero Goal; 2030 Focus Area Goals
In September 2021, City Council adopted the Austin Climate Equity Plan. The plan includes the bold and aggressive goal of equitably reaching net-zero community-wide greenhouse gas emissions by 2040 with a strong emphasis on cutting emissions by 2030. Getting to net-zero means the Austin community would reduce our use of fossil fuels to nearly zero. [...] Sustainable Buildings - 2030 Goals: All ...
Cool Roof Requirements
Austin Energy Code, an amended version of the 2021 IECC adopted under City Code Title 25, requires high-reflectance and high-emissivity roofing on low-slope commercial and multifamily roofs, reducing cooling loads and mitigating urban heat island effect.
Austin Energy Code Requires Cool Roof on Low-Slope Buildings
Some RestrictionsTex. Health & Safety Code Sec. 388.003(a)
Sec. 388.003. ADOPTION OF BUILDING ENERGY EFFICIENCY PERFORMANCE STANDARDS. (a) To achieve energy conservation in single-family residential construction, the energy efficiency chapter of the International Residential Code, as it existed on May 1, 2001, is adopted as the energy code in this state for single-family residential construction. On September 1, 2016, the energy efficiency chapter of t...
Flood Elevation Requirements
Austin's Building Code requires the lowest floor of any new or substantially improved building in a flood hazard area to sit at least two feet above the design flood elevation, with a matching two-foot freeboard added wherever an elevation requirement applies. Basements below grade on every side face the same two-foot floor, and shallow AO Zone lots add a depth-based buffer above adjacent grade.
Austin Requires 2-Foot Freeboard Above Flood Elevation
Some RestrictionsAustin City Code Sec. 25-12-53(C)(1)
(1)Elevation Requirements.(a)Unless otherwise specified in Title 25 (Land Development), the lowest floor of a building or structure shall be elevated a minimum of two feet above the design flood elevation.(b)Freeboard. Unless otherwise specified in the Title 25 (Land Development), a minimum freeboard of two foot shall be added where the design flood elevation or other elevation requirements are...
Looking for Travis County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Austin city rules.
Environmental Rules in Travis County →