# Building permits at 1603 Walnut St, Boulder, CO

Six permits here in the last two years. The newest, Jul 20: REVISION 8/13/26-Interconnection reverts back to a supply side connection in the CT Cabinet. Boulder publishes permits without map coordinates, so this address has no map and no quarter-mile list.

## At this address

| Date | Type | Work | Cost | Permit |
|---|---|---|---|---|
| Jul 20, 2026 | Electrical | REVISION 8/13/26-Interconnection reverts back to a supply side connection in the CT Cabinet, nonfusible disconnect (Utility AC Disconnect) and Production Meter will be installed on the NE side of the property, wire from the inverter to the interconnection has been upsized to account for voltage drop | $77,000 | [ELE2026-00431](https://nearbypermits.com/boulder/permit/ELE2026-00431/) |
| Dec 30, 2025 | Fire systems | Suburban Propane to set (1) 1000 Gallon Tanks for supply of propane for heaters on construction Site. I - Kota Construction Company on site | $500 | [FIR2025-00527](https://nearbypermits.com/boulder/permit/FIR2025-00527/) |
| May 16, 2025 | Fire systems | This project involves installing a new NFPA 13 (2022) compliant sprinkler system in a 4-story apartment building. It includes a dry system for the parking garage and four wet systems zoned by floor, with CPVC piping on levels 2?4 and steel piping on level 1. A manual wet standpipe system will be ins | $200,000 | [FIR2025-00105](https://nearbypermits.com/boulder/permit/FIR2025-00105/) |
| Mar 26, 2025 | Fire systems | New sprinkled building. Installation of an addressable Fire Lite ES-200X fire alarm system.(FAN) | $37,300 | [FIR2025-00097](https://nearbypermits.com/boulder/permit/FIR2025-00097/) |
| Jan 7, 2025 | New building | Redevelopment of the site with a 4-story mixed use building including open parking garage at grade, commercial cafe and baking kitchen space, 30 studio and 1 bedroom dwelling units, Level 4 commercial event space with a rooftop amenity deck. Associated with Site Review LUR2020-00064 and technical do | $17,066,272 | [BLD-MXU2023-00004](https://nearbypermits.com/boulder/permit/BLD-MXU2023-00004/) |
| Nov 14, 2024 | Electrical | Construction Temp Power linked with BLD-MXU2023-00004 | Not listed | [ELE2024-00983](https://nearbypermits.com/boulder/permit/ELE2024-00983/) |

## More on this street

Other addresses on Walnut St with permits, nearest house number first:

- [1620 Walnut St](https://nearbypermits.com/boulder/address/1620-walnut-st/): newest permit May 13, 2025
- [1634 Walnut St C](https://nearbypermits.com/boulder/address/1634-walnut-st-c/): newest permit Sep 24, 2026
- [1655 Walnut St 301](https://nearbypermits.com/boulder/address/1655-walnut-st-301/): newest permit Jan 15, 2026
- [1545 Walnut St](https://nearbypermits.com/boulder/address/1545-walnut-st/): newest permit Jun 9, 2025
- [1707 Walnut St 106](https://nearbypermits.com/boulder/address/1707-walnut-st-106/): newest permit May 28, 2026
- [1708 Walnut St](https://nearbypermits.com/boulder/address/1708-walnut-st/): newest permit Feb 21, 2025
- [1726 Walnut St](https://nearbypermits.com/boulder/address/1726-walnut-st/): newest permit Oct 17, 2025
- [1734 Walnut St](https://nearbypermits.com/boulder/address/1734-walnut-st/): newest permit Oct 2, 2025
- [1470 Walnut St](https://nearbypermits.com/boulder/address/1470-walnut-st/): newest permit Mar 20, 2026
- [1743 Walnut St](https://nearbypermits.com/boulder/address/1743-walnut-st/): newest permit Apr 15, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-06 18:16 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 6 permits at this address: https://nearbypermits.com/boulder/address/1603-walnut-st/