Greenwich's commercial real estate includes historic masonry buildings constructed before modern waterproofing standards existed alongside newer mixed-use developments built on reclaimed waterfront land. The older structures along Greenwich Avenue lack vapor barriers and often feature stone foundations that allow groundwater intrusion during heavy rain events. These buildings were designed for different uses and retrofitted for retail, creating HVAC and plumbing systems that were added decades after original construction. Water damage in these spaces often reveals itself slowly as moisture migrates through uninsulated wall cavities. The newer retail centers near Interstate 95 sit on filled land with high water tables, making them vulnerable to foundation seepage during spring thaw and storm surge events. Both building types require commercial retail water extraction approaches that account for their specific structural characteristics.