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Brentwood approves 40% green-space requirement and a new infill stormwater permit on first reading
Summary
The commission unanimously approved ordinances establishing a 40% minimum green-space requirement across several residential zones and a three-tier infill development permit tied to increased impervious surface, including a $150 permit fee and standards drawn from Nashville Metro guidance.
The Brentwood Board of Commissioners voted unanimously June 8 to adopt changes to the city's zoning and stormwater rules aimed at managing runoff from larger replacement homes.
City Manager Gage told the commission Ordinance 20 26-05 extends an existing 40% minimum green-space standard (previously required in OSRD zones) to agricultural, estate, large-lot residential and suburban-residential zones. "This change just simply requires ... a minimum green space of 40%," Gage said, explaining the goal is to preserve a lot’s capacity to absorb stormwater and limit off-lot runoff.
Councilors also approved Ordinance 20 26-06, which creates an infill development permit for lots platted after June 1, 2008. Gage described a three-tier system that is triggered by increases in impervious surface; the first tier begins at 800 square feet of new impervious area and higher tiers impose more stringent engineering and water-quality requirements. The permit fee was described as $150.
Why it matters: Commissioners said the amendments respond to a trend of tear-downs and larger replacement homes that increase stormwater and can affect neighbors and older subdivision drainage systems. Gage said much of the technical guidance was drawn from the Nashville-Davidson County stormwater manual so local builders should be familiar with the standards.
Commission comment and vote: Commissioners praised staff for thorough analysis and uniformity across codes; the mayor and commissioners called the changes "cut and dry" and the ordinances passed unanimously on first reading.
Next steps: The ordinances passed on first reading at this meeting; the record shows staff will notify builders, incorporate the requirements into permit-checklists, and educate stakeholders about grandfathering for permits already in process.
