# 2121 4th Street, Boulder

Source page: https://checkyourplace.com/address/boulder/2121-4th-street-boulder

## Facts

- City: Boulder
- Building type: house
- FEMA flood zone: Zone A, high risk; flood insurance required by federally backed lenders
- 2026 conforming loan limit: $879,750 (FHFA, Boulder County)
- EPA radon zone: 1 (highest potential)
- Sinkhole-prone ground: on karst terrain (USGS)
- Coordinates: 40.01749, -105.29192

Sourced directly from official city and county records.