Construction on Slopes.

Austin City Code tit. 30, ch. 30-5, subch. A, art. 7, div. 3

in effect

Austin City Code § 30-5-301 CONSTRUCTION OF A ROADWAY OR DRIVEWAY.

§ 30-5-301 - CONSTRUCTION OF A ROADWAY OR DRIVEWAY. (A) A person may not construct a roadway or driveway on a slope with a gradient of more than 15 percent unless the construction is necessary to provide primary access to: (1) at least two contiguous acres with a gradient of 15 percent or less; or (2) building sites for at least five residential units. (B) For construction described in this section, a cut or fill must be revegetated, or if a cut or fill has a finished gradient of more than 33 percent, stabilized with a permanent structure. This does not apply to a stable cut. Source: City Code Section 25-8-301; Ord. 031211-11; Ord. 031211-42.

Austin City Code § 30-5-302 CONSTRUCTION OF A BUILDING OR PARKING AREA.

§ 30-5-302 - CONSTRUCTION OF A BUILDING OR PARKING AREA. (A) A person may not construct: (1) a building or parking structure on a slope with a gradient of more than 25 percent; or (2) except for a parking structure, a parking area on a slope with a gradient of more than 15 percent. (B) A person may construct a building or parking structure on a slope with a gradient of more than 15 percent and not more than 25 percent if the requirements of this subsection are met. (1) Impervious cover on slopes with a gradients of more than 15 percent may not exceed 10 percent of the total area of the slopes. (2) The terracing techniques in the Environmental Criteria Manual are required for construction that is uphill or downhill of a slope with a gradient of more than 15 percent. (3) Hillside vegetation may not be disturbed except as necessary for construction, and disturbed areas must be restored with native and adapted vegetation as prescribed in the Environmental Criteria Manual. (4) For construction described in this section, a cut or fill must be revegetated, or if a cut or fill has a finished gradient of more than 33 percent, stabilized with a permanent structure. This does not apply to a stable cut. Source: City Code Section 25-8-302; Ord. 031211-11; Ord. 031211-42; Ord. 20131017-046.

Austin City Code § 30-5-303 SUBDIVISION NOTES.

§ 30-5-303 - SUBDIVISION NOTES. (A) A preliminary subdivision plan that proposes a single family residential lot on a slope with a gradient of more than 15 percent must include a plan note identifying the lot and describing the requirements of Subsection (B). (B) A final plat that proposes a single family residential lot on a slope with a gradient of more than 15 percent must include a plat note: (1) identifying the lot; and (2) stating the impervious cover and construction requirements for the lot. Source: City Code Section 25-8-303; Ord. 031211-11; Ord. 031211-42.

Austin City Code § 30-5-304 APPLICABILITY.

§ 30-5-304 - APPLICABILITY. This division does not apply in an urban watershed. Source: City Code Section 25-8-304; Ord. 031211-11; Ord. 031211-42.

Source: City of Austin, City Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/tx/austin/codes/code_of_ordinances?nodeId=TIT30AUTRCOSURE_CH30-5EN_SUBCHAPTER_AWAQU_ART7REALWA_DIV3COSLFetched: 10/27/2026