# Addition permit BLD-SFD2022-00175 at 3633 21st St, Boulder

Boulder Planning and Development Services permit BLD-SFD2022-00175: issued Nov 9, 2022 for addition work at 3633 21st St. Interior remodel of 1,659 sf (24% of existing floor area). Demo existing exterior fireplace. Addition of 445 sf roof deck above existing porch roof & associated door. New folding patio doors per plan. New basement door & landing/steps. New bathroom on upper floor. Remodel main floor kitchen, add new bar/kitchenette to basement. Includes all associated mechanical, electrical, & plumbing. Resubmitted for a reduction in scope to remove the lower level exterior patio and upper level roof deck.

- Permit number: BLD-SFD2022-00175
- Issued: Nov 9, 2022
- Type of work: Addition (city: Building Permit - Single Family Detached Dwelling, Addition and Alteration)
- Status: Finished (city: Letter of Completion)
- Reported cost: $150,000
- ZIP code: 80304
- All permits at this address: https://nearbypermits.com/boulder/address/3633-21st-st/

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-09 01:48 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 3633 21st St: https://nearbypermits.com/boulder/address/3633-21st-st/