3633 21st St

Boulder, CO 80304

14 permits on record here. The newest, Oct 10, 2024: All structures on the property must be permitted separately Total tear-off & reroof of SFD. Boulder publishes permits without map coordinates, so this address has no map and no quarter-mile list.

1. All structures on the property must be permitted separately Total tear-off & reroof of SFD

   Roofing
   Oct 10, 2024$36,000
2. Level 2 Alteration

   Plumbing
   Nov 9, 2022$10,000
3. Level 2 Alteration

   Mechanical (HVAC)
   Nov 9, 2022$5,000
4. Level 2 Alteration

   Electrical
   Nov 9, 2022$10,000
5. Interior remodel of 1,659 sf (24% of existing floor area)

   Addition
   Nov 9, 2022$150,000
6. *Voided for inactivity - requirements not met.* *Installation of a replacement 190k BTU

   Mechanical (HVAC)
   Dec 12, 2018$17,500
7. *Installation of replacement 36k BTU ductless cooling system

   Mechanical (HVAC)
   Jul 5, 2018$15,000
8. Replace gas fireplace

   Mechanical (HVAC)
   Jun 22, 2015$2,000
9. Minor interior remodel (250SF) and large new deck (1,616 SF) for SFD

   Electrical
   Feb 6, 2015$2,000
10. Minor interior remodel (250SF) and large new deck (1,616 SF) for SFD

    Alteration or repair
    Feb 6, 2015$150,000
11. Tear-off reroof of SFD, 46.64 squares on a pitch represented as 5/12

    Roofing
    May 23, 2011$13,796
12. New Comfort Cooling

    Mechanical (HVAC)
    Jun 2, 2006$6,500
13. Fire fire sprinkler system

    Fire systems
    Feb 10, 1988not listed
14. 1 Dw un. The original general permit number is m3757

    New building
    Sep 10, 1987$275,000

• 3639 21st St newest permit Dec 6, 2024
• 3621 21st St newest permit Jun 24, 2026
• 3867 21st St newest permit May 4, 2026
• 2980 21st St newest permit Jul 20, 2026
• 2941 21st St newest permit Nov 18, 2025
• 2921 21st St newest permit Oct 7, 2025
• 2881 21st St newest permit Sep 23, 2026
• 2860 21st St newest permit Aug 18, 2026
• 2820 21st St newest permit Jul 28, 2026
• 2327 21st St newest permit Aug 25, 2026

Boulder Planning and Development Services updated its data Oct 6, 2026. We checked it Oct 7, 08:36 UTC. See the city's official records.

At this address: every permit the city holds. Nearby: permits from the last two years, from our copy of the city's data.

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