Planning board reviews Land Use Plan 2050 materials, debates community septic and conservation subdivisions

Tom Altieri, Orange County senior planner, told the Planning Board on March 4 that staff updated the Land Use Plan fact book with recent American Community Survey data and building activity and will brief the Board of County Commissioners on March 10 before beginning outreach. “About 40 percent of that fact book has been updated with that information,” Altieri said.

The presentation and board discussion focused on decentralized wastewater options — the difference between individual septic systems and shared or “community” systems — and on a conservation-subdivision model that concentrates homes to preserve larger swaths of open space. Altieri described the two schematic approaches: one drain field per house versus a shared drain field for multiple homes.

Cy Stober, Planning & Inspections director, and staff specialists described larger Type 5/6 community systems as engineered facilities that include pre-treatment and nitrogen-cycling elements and behave more like small wastewater treatment systems than conventional septic. Stober said state permitting (N.C. DEQ) typically governs those systems but that Orange County requires reporting and annual inspections for many developments.

Board members pressed staff on costs, soils suitability, and long-term maintenance. Statler Gilfillen asked for sources after noting a table of “estimated installation and maintenance costs” in the packet that he felt differed from his own figures. Tom Altieri and Cy Stober said the presenter (Tony Whitaker, a professional engineer who spoke to the commissioners) compiled the numbers from practitioner contacts and that some packet tables report construction-only costs; Stober noted a conventional single-family septic “usually costs somewhere in the neighborhood of $25,000 to $30,000 from soup to nuts.”

Members repeatedly raised soils and location constraints. Beth Bronson said Orange County’s clay soils reduce percolation and make many sites poor candidates for community disposal. Board members also discussed how conservation subdivisions, which trade reduced lot sizes for permanently protected open space, could rely on clustered wastewater to enable smaller building footprints while preserving contiguous open space for wildlife corridors, agriculture and recreation.

On oversight and liability, Charity Kirk and others asked how the county would avoid becoming responsible if a community treatment system or associated properties fail. Stober and Altieri said common tools include operation agreements, HOA maintenance contracts and, potentially, developer performance guarantees or bonds held as a safeguard; Stober noted the county would need legal review to confirm authority to require such guarantees.

Board members considered policy pathways. Staff recommended the usual planning sequence: adopt a land-use vision in the plan, then amend the Unified Development Ordinance (UDO) to implement that vision, though the board could also ask the commissioners to initiate ordinance changes sooner. Cy Stober cautioned that stricter requirements and higher open-space or design standards increase development costs and that the board must weigh environmental protection, housing attainability and tax-base effects.

Next steps: staff will present the fact book update and housing-gap materials to the commissioners on March 10 and host a housing economics and outreach retreat on March 21. If the commissioners direct staff to proceed, the county will pursue a consultant contract amendment, revise the draft plan as needed, and schedule public engagement.