Austin commission approves SF-6 rezoning for two Zimmerman Lane parcels with 4-units-per-acre cap

The Zoning and Planning Commission recommended approval Tuesday of rezonings for two vacant parcels on Zimmerman Lane — C14-2024-0165 (Zimmerman SF South, 11301 Zimmerman Lane) and C14-2024-0169 (Zimmerman SF North, 11300 Zimmerman Lane) — changing each property from Development Reserve (DR) to SF-6 (Townhouse and Condominium residence). The commission’s motion, made by Vice Chair Betsy Greenberg, included a conditional overlay limiting development to 4 units per acre. The vote was 6 in favor, 2 opposed and 1 abstention.

Staff planner Sherry Ceruitas of the City of Austin’s Planning Department told commissioners the smaller, adjacent tracts total about 11.59 acres (6.62 acres on the south tract, 4.97 acres on the north tract) and that staff recommended SF-6 zoning for both sites because it is “consistent with the previously city council approved SF-6 CO zoning along Zimmerman Lane to the east.” Ceruitas said Zimmerman Lane is a 20-foot-wide collector that dead-ends in a cul-de-sac, was annexed by the city in 1997, and has no planned roadway improvements or alignment to FM 620.

The applicant, represented by Henry Gilmore of the law firm Jackson Walker, described the proposals as low-density, condominium-style developments by Toll Brothers. Gilmore said the south tract would contain 21 units (about 3.17 units per acre) and the north tract 16 units (about 3.2 units per acre), for a total of 37 units, and characterized the projects as “a very low traffic generator,” adding specific trip estimates: “The AM peak hour trips is 29, the PM peak hour trips is 30.” He also said the applicant would be asked at site plan to dedicate right-of-way for possible future expansion of Zimmerman Lane.

Two residents of the adjacent Woods at 4 Points subdivision spoke in opposition, urging a delay until traffic and safety issues on FM 620 and Zimmerman Lane are addressed. Matt Johnson, a resident, said the neighborhood’s position was “not now” and pressed the commission to require a traffic-signal or secondary access point, a formal traffic impact analysis for each Zimmerman Lane rezoning and a unit cap matching nearby rezonings. Johnson said the neighborhood’s own review of crash data showed multiple serious-injury collisions on the FM 620 corridor in recent years and that existing access at Zimmerman and FM 620 is hazardous.

Jordan Murray, an HOA board member from Woods at 4 Points, added that the narrow, 20-foot road and nearby commercial activity, including a neighboring Rudy’s barbecue and vehicle storage, create recurring congestion and safety problems. Murray also said the properties lie near the Balcones Canyonlands Preserve and inside a wildfire-prone area and asked the commission to coordinate with TxDOT and city staff before permitting additional units.

Commission discussion touched on several technical and policy points: commissioners asked whether new city site-plan regulations would affect the properties (staff said they would not, because the sites are not in the SF-1/SF-2/SF-3 tier), whether a neighborhood traffic analysis or traffic impact analysis would be required (staff said Transportation and Public Works will determine that at site plan based on the actual layout and unit count), and whether signalization at Zimmerman and FM 620 is feasible (staff and TPW reported TxDOT has indicated a new signal would be difficult given the proximity of an existing signal at Vista Park Drive).

Environmental constraints were raised by staff, who noted that a portion of the Zimmerman Lane corridor includes habitat for species such as the Golden-cheeked Warbler and an endangered salamander, and that these constraints have historically limited roadway connections. Applicant counsel and staff both noted Fire Station 54 is approximately four minutes from the site and that the City of Austin provides fire protection services; Gilmore also said the city recently committed funding to wildfire mitigation.

Commissioners split on policy grounds. Commissioner Lonnie Stern and several others warned the commission against approving denser or disconnected development that the roadway network cannot safely serve; Stern said rubber-stamping zoning without calling out the mismatch between land use and transportation infrastructure would be poor precedent. Vice Chair Betsy Greenberg moved approval with the 4-units-per-acre cap; the applicant confirmed agreement with the cap. After the vote the chair announced the motion carried, 6–2–1.

The rezoning recommendation now goes to Austin City Council for final consideration. If the properties proceed to site plan or subdivision, city reviewers will determine whether additional studies or dedications are required and what site-level transportation, utility and fire protections are necessary.