Buildings are counted per structure inside Florida, from FEMA/ORNL USA Structures, filtered to commercial occupancies over 4,000 square feet and excluding structures under 3.2 meters tall. Coverage varies by place, so these records do not count every building. USA Structures source catalog. We flag categories with fewer than 25 recorded buildings or less than 0.5% of the counted total. The flag asks you to check coverage; it does not tell us how many buildings are missing.
Competitor counts and employment are Census County Business Patterns for NAICS 238220, plumbing, heating, and air-conditioning contractors. These counts describe plumbing and HVAC businesses only. They do not count roofing, electrical or fire-protection competitors. Census CBP methodology. Source observations remain available in the full geographic dataset.