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Fairfax staff proposes folding PRC plan exceptions into minor-modification rules
Summary
DPD staff told the Land Use Policy Committee they want to remove PRC plan exceptions for many building additions and site changes so those cases use countywide minor-modification procedures, standardizing notice and thresholds. Planning Commission review is scheduled for Dec. 12; Board action could come in spring 2025.
DPD staff presented a proposed zoning amendment that would largely eliminate the separate PRC-plan exceptions for building additions and other nonstructural site changes and instead handle those changes through the county's minor modification provisions.
A DPD presenter identified on the record with multiple similar name variants described the history and rationale: the PRC (Planned Residential Community) district was created in 1962 and currently applies different administrative thresholds and notice requirements than other zoning districts. Staff said the PRC provisions "largely mirror those that have been in place since 1994" but now diverge from the modern minor modification rules and recommended consolidation to ensure consistent review.
Staff cited specific thresholds: PRC currently permits building additions up to the lesser of 10% or 2,000 square feet; the minor-modification standards instead allow an addition equal to the greater of 500 square feet or roughly 5% for smaller buildings, with separate calculations for very large developments and additional notice requirements to adjacent property owners. Staff said aligning PRC to the minor-modification provisions would both standardize outcomes and add notice protections in cases where minor modifications require neighbor notification.
Supervisor Alcorn asked about the timeline for outreach and Board authorization. Staff said they will brief the Planning Commission on Dec. 12, hold virtual community meetings over the coming weeks (with additional district-specific meetings possible in January), and aim for Board consideration in spring 2025 (February'March at the earliest).
Supervisor Walkinshaw asked how frequently the gap between PRC exemptions and minor-modification thresholds has occurred in practice (for example, a 20,000-square-foot building proposing a 1,500-square-foot addition that would be exempt under old PRC rules but exceed a minor-mod threshold). DPD zoning administration and zoning-evaluation staff said such instances appear rare in their recent records'staff estimated numbers "closer to 0 than 4" across the past five years and said they will search records to provide a clearer count.
Staff named Reston, Burke and Cardinal Forest as the county's three PRC districts and noted one high-profile example where a PRC plan was needed when a whole facility was rebuilt (the Walker Nature Center). Committee members encouraged residents and stakeholders to bring concrete examples to the upcoming workshops so staff could identify any unintended consequences of the proposed consolidation.
Next steps: staff will continue outreach, publish white papers and seek Planning Commission feedback in December before returning the item to the Board for possible spring 2025 action.
