Rockwall planners propose lower residential density, new design rules and traffic study in draft comprehensive plan

City planning staff presented a draft update to Rockwall’s comprehensive plan at the June 30 Planning and Zoning Commission meeting, proposing a suite of changes intended to lower residential density, strengthen neighborhood design, and position commercial corridors for reinvestment.

Ryan (staff) told the commission the update replaces the current gross‑density method with a net‑density calculation that subtracts floodplain from gross acreage, and said the change — combined with new residential policies such as a 10,000‑square‑foot minimum lot benchmark and anti‑monotony standards — would reduce the number of buildable lots in recent developments. Using recent subdivisions as examples, Ryan said the net method and the new lot‑mix standards would remove dozens to hundreds of lots from future plans.

The draft also includes policy shifts to encourage adaptive reuse and “live/work” designations near downtown, incentives for senior‑housing options (independent living, memory care and age‑restricted single‑family housing), and corridor strategies for I‑30 and SH‑276 focused on destination‑oriented commercial and employment uses. Staff recommended integrating retention ponds into neighborhood amenities and favoring curb‑and‑gutter roadway sections over valley gutters.

Commissioners pressed staff on infrastructure implications, especially traffic signal timing and whether the plan should explicitly commit to creating a traffic‑engineering function. Commissioner comments ranged from urging staff to note that TxDOT controls most signals to asking for written language acknowledging the city will have to assume signal responsibilities at a future population threshold. Ryan said the issue would be taken back to the Comprehensive Plan Advisory Committee (CPAC) for drafting appropriate policy language rather than inserted as an unqualified commitment.

Several commissioners also asked staff to review older zoning districts that appear inconsistent with the proposed map changes and to prepare implementation steps and zoning code amendments that would follow the plan if adopted.

The draft incorporates a city‑attorney review where state law affects local regulation: staff cited SB 785 as the driving force behind the manufactured‑housing text amendment discussed elsewhere on the agenda. Ryan said the plan and its implementing code changes will return for further public review and that staff will prepare a packet outlining specific zoning changes and next steps.

The commission did not vote on the comprehensive plan at the meeting; staff will return with revised language addressing traffic timing and other clarifications.