# Alteration or repair permit BLD-NRE2020-00209 at 3401 Bluff St, Boulder

Boulder Planning and Development Services permit BLD-NRE2020-00209: issued Sep 7, 2021 for alteration or repair work at 3401 Bluff St. *Tenant finish for Twitter Floors 1 and 4 - 17564 sf total. Resubmittal after permit issuance 10/25/2021 to change occupancy classification for breakroom.

- Permit number: BLD-NRE2020-00209
- Issued: Sep 7, 2021
- Type of work: Alteration or repair (city: Building Permit - Non-Residential, Tenant Finish)
- Status: Finished (city: Certificate of Occupancy)
- Reported cost: $3,085,990
- ZIP code: 80301
- All permits at this address: https://nearbypermits.com/boulder/address/3401-bluff-st/

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-12 20:10 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 3401 Bluff St: https://nearbypermits.com/boulder/address/3401-bluff-st/