Group weighs conservation subdivisions: higher density bonuses vs. stronger environmental buffers

The committee spent a sustained portion of the meeting on conservation subdivisions, exploring whether the county's existing conservation-subdivision rules should be altered to better protect sensitive resources while also making conservation subdivisions economically feasible for developers.

Planning commissioner Darlene Bowen submitted written comments (read into the record) urging a higher minimum parcel threshold (she suggested raising the minimum from 40 acres toward 100 acres for eligibility in her example), larger road and neighbor buffers (she recommended a 500-foot setback from public streets and a 300-foot agricultural buffer in areas she cited), and stronger stream and wetland buffers. Bowen argued that many parcels in priority conservation areas lie on narrow rural roads or depend on wells, which raises service and environmental concerns.

Committee members discussed three linked policy levers: (1) whether conservation subdivisions should be processed through a conditional use permit (CUP) so the Board of Supervisors can evaluate site-specific buffers, road plans and easement management; (2) whether to increase density bonuses substantially so conservation subdivisions become financially viable for developers (examples discussed: increasing bonuses from modest current levels to 60'85% on larger parcels, resulting in materially more buildable lots on a given tract); and (3) whether to exclude already-unbuildable lands (floodplain, jurisdictional wetlands, perennial streams) from the conserved-acreage calculation so developers cannot count those lands toward conservation thresholds and receive bonus density for land that was already restricted.

Several members cautioned that increasing density bonuses on very large parcels would raise questions about roadway capacity, service provision and overall scale of development; others argued higher bonuses are necessary to offset higher infrastructure costs associated with conservation subdivision requirements, such as road standards. The Hidden Springs case was referenced as a prior example where a conservation subdivision raised public concern about private roads and gates and required Board review.

A near-term recommendation the group coalesced around was to ask staff to (a) clean up ordinance language to refer to "jurisdictional waters" or equivalent technical terms rather than a lay list ("wetlands and perennial creeks"), and (b) consider excluding unbuildable lands from bonus calculations. The committee did not set final bonus percentages but discussed the option of moving conservation subdivisions to CUP review and studying higher density bonuses with stronger buffer and easement conditions.

Staff and members noted conservation subdivisions have been on the county code for several years but are rarely used; committee comments emphasized balancing environmental protection with financial viability so the tool can be implemented in appropriate locations. The committee requested staff prepare draft language and analysis of impacts, including how proposed changes would interact with rezoning proffers and state law.