St. Louis treats heat-island mitigation through Climate Action Plan goals, the Forestry Division's tree canopy program, and Form-Based Code green-space provisions, but no single ordinance mandates cool surfaces or canopy on private parcels.
Heat-island work draws on three threads: Title XX urban forestry plantings on the public right-of-way, the 2024 Form-Based Code requiring landscaping and pervious area in many transect zones, and the Office of Sustainability's heat-vulnerability mapping that prioritizes cooling investments in north St. Louis where canopy is below 20%. Cooling centers operate during heat advisories under the Department of Health. Private homeowners face no heat-island compliance mandate beyond standard FBC landscape requirements at redevelopment.
Failure to install required FBC landscaping on a development site can block certificate of occupancy until plantings or pervious paving are completed.
St. Louis, MO
St. Louis follows the International Energy Conservation Code adopted under Title X for new construction and major roof replacements on commercial buildings, ...
St. Louis, MO
St. Louis canopy averages 27% citywide but drops below 20% in north-side neighborhoods like Wells-Goodfellow and Hyde Park. The Forestry Division and Climate...
See how St. Louis's heat island mitigation rules stack up against other locations.
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