# Building permits at 4124 St Croix St, Boulder, CO 15 permits on record here. The newest, Mar 19: Replace Furnace PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued. 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 | |---|---|---|---|---| | Mar 19, 2026 | Mechanical (HVAC) | Replace Furnace PLEASE NOTE: APPLICABLE ONLY TO SYSTEMS WITH FUEL BURNING APPLIANCES: All new plastic glued vents for fuel burning appliances must undergo pressure testing. To facilitate the inspection process, please provide photographic evidence of the pressure test directly to the assigned inspec | $9,530 | [MEC2026-00413](https://nearbypermits.com/boulder/permit/MEC2026-00413/) | | Sep 30, 2024 | Roofing | VOID-NO INSPECTIONS WITHIN 180 DAYS Remove existing shingles and install a Class 4 IR asphalt dimensional shingle system PV System to be removed to replace roofing system, then replace to original plans | $12,675 | [RFG2024-00636](https://nearbypermits.com/boulder/permit/RFG2024-00636/) | | Jan 23, 2023 | Electrical | Dedicated 50 amp circuit in garage for car charging | $999 | [ELE2023-00049](https://nearbypermits.com/boulder/permit/ELE2023-00049/) | | Jan 24, 2022 | Electrical | install 125 amp sub-panel in garage,install 2 40 amp circuits for future appliances in kitchen, and future basement finish | $2,500 | [ELE2022-00108](https://nearbypermits.com/boulder/permit/ELE2022-00108/) | | May 19, 2016 | Mechanical (HVAC) | Replacement Comfort Cooling | $7,232 | [PMT2016-20160-MEC](https://nearbypermits.com/boulder/permit/PMT2016-20160-MEC/) | | Jan 24, 2013 | Electrical | Installation of a flush mount 6.48 kW photovoltaic system Array to be parallel to roof plane, and remain below ridge, inside/below hips and rake edges, and above eave. See engineer's letter and/or drawing(s) for specific information. | $19,440 | [PMT2013-00325-ELE](https://nearbypermits.com/boulder/permit/PMT2013-00325-ELE/) | | Nov 16, 2011 | Mechanical (HVAC) | Replacement Water Heater, Replacement Forced Air Furnace | $7,112 | [PMT2011-20311-MEC](https://nearbypermits.com/boulder/permit/PMT2011-20311-MEC/) | | Dec 13, 1999 | Electrical | Wiring for CC. | $156 | [PMT1999-09868-ELE](https://nearbypermits.com/boulder/permit/PMT1999-09868-ELE/) | | Dec 13, 1999 | Mechanical (HVAC) | Comfort cooling. | $1,698 | [PMT1999-09867-MEC](https://nearbypermits.com/boulder/permit/PMT1999-09867-MEC/) | | May 7, 1999 | Mechanical (HVAC) | Mechanical | $3,500 | [PMT1999-03808-MEC](https://nearbypermits.com/boulder/permit/PMT1999-03808-MEC/) | | Oct 16, 1998 | Electrical | Electrical temporary electric service | Not listed | [PMT1998-07099-ELE](https://nearbypermits.com/boulder/permit/PMT1998-07099-ELE/) | | Oct 16, 1998 | Plumbing | Plumbing plumbing 3 baths | $5,400 | [PMT1998-07097-PLB](https://nearbypermits.com/boulder/permit/PMT1998-07097-PLB/) | | Oct 16, 1998 | Electrical | Electrical wiring and new service | $4,000 | [PMT1998-07095-ELE](https://nearbypermits.com/boulder/permit/PMT1998-07095-ELE/) | | Oct 16, 1998 | New building | Single family dwelling attached garage unfinished basement | $175,270 | [PMT1998-07088](https://nearbypermits.com/boulder/permit/PMT1998-07088/) | | Sep 1, 1998 | Electrical | Electrical temporary construction power | Not listed | [PMT1998-05980-ELE](https://nearbypermits.com/boulder/permit/PMT1998-05980-ELE/) | ## Zoning requests nearby We don't list zoning cases for Boulder yet. Look them up on the city's Board of Zoning Adjustment page: https://bouldercolorado.gov/government/board-commission/board-zoning-adjustment ## More on this street Other addresses on St Croix St with permits, nearest house number first: - [4129 St Croix St](https://nearbypermits.com/boulder/address/4129-st-croix-st/): newest permit Dec 18, 2025 - [4141 St Croix St](https://nearbypermits.com/boulder/address/4141-st-croix-st/): newest permit May 11, 2026 - [4104 St Croix St](https://nearbypermits.com/boulder/address/4104-st-croix-st/): newest permit Nov 5, 2025 - [4162 St Croix St](https://nearbypermits.com/boulder/address/4162-st-croix-st/): newest permit Apr 16, 2025 - [4181 St Croix St](https://nearbypermits.com/boulder/address/4181-st-croix-st/): newest permit Jun 4, 2025 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-10 21:15 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 15 permits at this address: https://nearbypermits.com/boulder/address/4124-st-croix-st/