# Building permits at 1819 Walnut St, Boulder, CO

Nine permits on record here. The newest, Dec 10, 2025: 11.5 kW Photovoltaic and Battery system installation. 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 |
|---|---|---|---|---|
| Dec 10, 2025 | Electrical | 11.5 kW Photovoltaic and Battery system installation | $26,851 | [ELE2025-01120](https://nearbypermits.com/boulder/permit/ELE2025-01120/) |
| Jul 26, 2021 | Mechanical (HVAC) | *Voided for inactivity - no inspections within 180 days* Install heat pump water heater | $2,405 | [MEC2021-01454](https://nearbypermits.com/boulder/permit/MEC2021-01454/) |
| Jan 29, 2021 | Plumbing | *Addition and remodel of a SFD to include approximately 149 SF of work area of remodel on the main floor of the existing home, 2-story addition and basement addition to the rear of the home (212 SF main level, 366 SF upper level, and 301 SF basement, for a total of approximately 879 SF of addition). | $10,000 | [PLB2020-00640](https://nearbypermits.com/boulder/permit/PLB2020-00640/) |
| Jan 29, 2021 | Mechanical (HVAC) | *Addition and remodel of a SFD to include approximately 149 SF of work area of remodel on the main floor of the existing home, 2-story addition and basement addition to the rear of the home (212 SF main level, 366 SF upper level, and 301 SF basement, for a total of approximately 879 SF of addition). | $12,000 | [MEC2020-01511](https://nearbypermits.com/boulder/permit/MEC2020-01511/) |
| Jan 29, 2021 | Electrical | *Addition and remodel of a SFD to include approximately 149 SF of work area of remodel on the main floor of the existing home, 2-story addition and basement addition to the rear of the home (212 SF main level, 366 SF upper level, and 301 SF basement, for a total of approximately 879 SF of addition). | $15,000 | [ELE2020-01325](https://nearbypermits.com/boulder/permit/ELE2020-01325/) |
| Jan 29, 2021 | Addition | *Addition and remodel of a SFD to include approximately 149 SF of work area of remodel on the main floor of the existing home, 2-story addition and basement addition to the rear of the home (212 SF main level, 366 SF upper level, and 301 SF basement, for a total of approximately 879 SF of addition). | $175,000 | [BLD-SFD2020-00412](https://nearbypermits.com/boulder/permit/BLD-SFD2020-00412/) |
| Feb 24, 2011 | Roofing | Total tear off and reroof of existing single family dwelling. 30-yr OC Oakridge shingles as approved through HIS2011-00030, 11.9 squares, 4/12 pitch as indicated on permit application. | $3,324 | [PMT2011-00734-RFG](https://nearbypermits.com/boulder/permit/PMT2011-00734-RFG/) |
| Oct 7, 2002 | Mechanical (HVAC) | Installation of a forced air furnace (70k BTU). | $1,742 | [PMT2002-04347-MEC](https://nearbypermits.com/boulder/permit/PMT2002-04347-MEC/) |
| Jan 20, 2000 | Fence, wall or deck | Erect a five foot fence. | $1,000 | [PMT1999-09352-FEN](https://nearbypermits.com/boulder/permit/PMT1999-09352-FEN/) |

## More on this street

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

- [1818 Walnut St](https://nearbypermits.com/boulder/address/1818-walnut-st/): newest permit Sep 16, 2026
- [1802 Walnut St](https://nearbypermits.com/boulder/address/1802-walnut-st/): newest permit Oct 24, 2024
- [1860 Walnut St 3](https://nearbypermits.com/boulder/address/1860-walnut-st-3/): newest permit Nov 6, 2024
- [1743 Walnut St](https://nearbypermits.com/boulder/address/1743-walnut-st/): newest permit Apr 15, 2025
- [1734 Walnut St](https://nearbypermits.com/boulder/address/1734-walnut-st/): newest permit Oct 2, 2025
- [1726 Walnut St](https://nearbypermits.com/boulder/address/1726-walnut-st/): newest permit Oct 17, 2025
- [1921 Walnut St](https://nearbypermits.com/boulder/address/1921-walnut-st/): newest permit Sep 2, 2025
- [1708 Walnut St](https://nearbypermits.com/boulder/address/1708-walnut-st/): newest permit Feb 21, 2025
- [1707 Walnut St 106](https://nearbypermits.com/boulder/address/1707-walnut-st-106/): newest permit May 28, 2026
- [1940 Walnut St 200](https://nearbypermits.com/boulder/address/1940-walnut-st-200/): newest permit Jan 27, 2025

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Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 05:18 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 9 permits at this address: https://nearbypermits.com/boulder/address/1819-walnut-st/