# Building permits at 3250 Walnut St, Boulder, CO 14 permits on record here. The newest, May 16, 2025: New 480v service, and standby generator replacement. 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 | |---|---|---|---|---| | May 16, 2025 | Electrical | New 480v service, and standby generator replacement. | $500,000 | [ELE2025-00346](https://nearbypermits.com/boulder/permit/ELE2025-00346/) | | Sep 21, 2010 | Fence, wall or deck | Addition to existing fence in parking lot of Comcast buidling (technical only, no public access). Proposed chain link fence and gate in eastern portion of parking lot. 7-feet in height, 120-feet in length. | $2,000 | [PMT2010-03936-FEN](https://nearbypermits.com/boulder/permit/PMT2010-03936-FEN/) | | Aug 9, 2010 | Roofing | Partial tear off and overlay of existing non-residential roof at Comast building. Versico Ballasted 60-mil reinforced EPDM, 42.6 squares, flat roof. | $12,968 | [PMT2010-03309-RFG](https://nearbypermits.com/boulder/permit/PMT2010-03309-RFG/) | | Jan 11, 2000 | Fire systems | install fire supression system in computer room | $48,000 | [PMT2000-00258-FIR](https://nearbypermits.com/boulder/permit/PMT2000-00258-FIR/) | | Nov 30, 1999 | Plumbing | Tenant finish and addition. Combines electrical #999460 and mechanical #999461 with general permit. | Not listed | [PMT1999-09459-PLB](https://nearbypermits.com/boulder/permit/PMT1999-09459-PLB/) | | Nov 30, 1999 | Mechanical (HVAC) | Tenant finish and addition. Combines electrical #999460 and mechanical #999461 with general permit. | $50,000 | [PMT1999-09459-MEC](https://nearbypermits.com/boulder/permit/PMT1999-09459-MEC/) | | Nov 30, 1999 | Electrical | Tenant finish and addition. Combines electrical #999460 and mechanical #999461 with general permit. | $190,000 | [PMT1999-09459-ELE](https://nearbypermits.com/boulder/permit/PMT1999-09459-ELE/) | | Nov 30, 1999 | Addition | Tenant finish and addition. Combines electrical #999460 and mechanical #999461 with general permit. | $340,000 | [PMT1999-09459](https://nearbypermits.com/boulder/permit/PMT1999-09459/) | | May 1, 1990 | Electrical | Electrical SUB PANEL FEED | $950 | [PMT1990-P9981-ELE](https://nearbypermits.com/boulder/permit/PMT1990-P9981-ELE/) | | Apr 3, 1990 | Electrical | Electrical outlets,switches,fixtures | $4,800 | [PMT1990-P9407-ELE](https://nearbypermits.com/boulder/permit/PMT1990-P9407-ELE/) | | Mar 27, 1990 | Alteration or repair | Int renov. The original general permit number is p9188. | $36,000 | [PMT1990-P9188](https://nearbypermits.com/boulder/permit/PMT1990-P9188/) | | Mar 27, 1990 | Alteration or repair | Int renov the original general permit number is 9188. | $36,000 | [PMT1990-09188](https://nearbypermits.com/boulder/permit/PMT1990-09188/) | | Nov 22, 1989 | Addition | Addition. The original general permit number is p6851. | $42,400 | [PMT1989-P6851](https://nearbypermits.com/boulder/permit/PMT1989-P6851/) | | Jul 5, 1989 | Sign | Sign non elec sign | Not listed | [PMT1989-P3657-SGN](https://nearbypermits.com/boulder/permit/PMT1989-P3657-SGN/) | ## More on this street Other addresses on Walnut St with permits, nearest house number first: - [3201 Walnut St](https://nearbypermits.com/boulder/address/3201-walnut-st/): newest permit Nov 18, 2025 - [3300 Walnut St](https://nearbypermits.com/boulder/address/3300-walnut-st/): newest permit Jun 2, 2025 - [3333 Walnut St](https://nearbypermits.com/boulder/address/3333-walnut-st/): newest permit Nov 17, 2025 - [3151 Walnut St](https://nearbypermits.com/boulder/address/3151-walnut-st/): newest permit Nov 8, 2024 - [3003 Walnut St](https://nearbypermits.com/boulder/address/3003-walnut-st/): newest permit Jul 31, 2025 - [3720 Walnut St](https://nearbypermits.com/boulder/address/3720-walnut-st/): newest permit Sep 15, 2026 - [3750 Walnut St](https://nearbypermits.com/boulder/address/3750-walnut-st/): newest permit Dec 20, 2024 - [2590 Walnut St](https://nearbypermits.com/boulder/address/2590-walnut-st/): newest permit Sep 15, 2026 - [2465 Walnut St 1](https://nearbypermits.com/boulder/address/2465-walnut-st-1/): newest permit Jun 9, 2026 - [2463 Walnut St](https://nearbypermits.com/boulder/address/2463-walnut-st/): newest permit May 21, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-08 02:15 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 14 permits at this address: https://nearbypermits.com/boulder/address/3250-walnut-st/