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Planners present housing needs and mixed‑use overlay; ADU limits and deed pitfalls spur lengthy debate
Summary
A county consultant presented housing projections showing an estimated deficit of about 2,300 dwelling units by 2050 under current buildout assumptions; board discussion moved to mixed‑use overlays, permitting incentives and a prolonged public exchange on accessory dwelling units and mobile‑home/lot‑split pitfalls.
County planning staff and a consultant presented a housing needs analysis and preliminary land‑use proposals, concluding that Columbia County’s population (about 72,000 on 4/1/2024) could grow to roughly 80,900 by 2050 and that the county would need about 32,000 dwelling units to accommodate that population — about 2,300 more units than currently exist if no additional development occurs.
The consultant explained the method: population projections from the University of Florida and an average household size of 2.5 were used to calculate housing demand; staff then compared demand to the county’s future‑land‑use map and estimated buildable capacity under different density scenarios. She recommended focusing development in the designated urban development area (DUDA) and using mixed‑use node and corridor overlays to encourage infill and higher‑density residential near major intersections.
Planning staff and commissioners discussed how to encourage upstream incentives, streamline permitting and use a revised scorecard to prioritize projects that meet county objectives. Staff said changes to the county’s land‑development regulations (LDRs) and a new planned‑unit‑development (PUD) option are in early drafting stages and that additional workshops will be scheduled before formal adoption.
During public comment and a protracted board exchange, planners and members discussed proposed changes to accessory dwelling unit (ADU) rules and practical consequences for buyers, lenders and insurance markets. The current ADU rule cited in the discussion limits an ADU to 800 square feet or 75% of the principal dwelling’s habitable area; one member proposed raising that cap to 1,000 square feet so smaller single‑family properties could make ADUs mortgage‑eligible. Planning staff cautioned that mobile homes used as ADUs, separate meters for rentals, and previous unpermitted placements can create nonconforming situations that later complicate sales and lending.
Planners also raised a recurring problem: deed filings and lot splits can occur without buyers checking zoning or permits, creating ‘‘lot‑of‑record’’ and nonconforming situations that are difficult to remediate later. Staff said they plan more outreach — such as a notice in the clerk’s office when deeds are filed — and clearer online guidance for buyers and real‑estate agents.
What’s next: The planning team will continue LDR red‑lines and hold workshops on mixed‑use overlays, ADUs and housing incentives; the advisory board will receive follow‑up materials and can recommend changes before any formal ordinance or comp‑plan amendment is advanced to the Board of County Commissioners.
