# Building permits at 520 Marine St, Boulder, CO 11 permits on record here. The newest, Jan 13: Replacement furnace Re: Historic District-No work is going to be done on the outside of the home' PLEASE. 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 | |---|---|---|---|---| | Jan 13, 2026 | Mechanical (HVAC) | replacement furnace Re: Historic District-No work is going to be done on the outside of the home' 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 | $8,539 | [MEC2026-00052](https://nearbypermits.com/boulder/permit/MEC2026-00052/) | | Jan 3, 2024 | Mechanical (HVAC) | Install a new 4 zone Mitsubishi mini split heat pump system. 48,000 BTU cooling/54,000 BTU heating / 23.00 SEER. 200 amp overhead service change. Convert cellar panel to junction box. Install new 200 amp 40 circuit panel. Complete grounding and bonding. Install whole home surge protection. Landmark | $19,281 | [MEC2024-00006](https://nearbypermits.com/boulder/permit/MEC2024-00006/) | | May 1, 2018 | Roofing | *Voided for inactivity - no inspections within 180 days* Total tear-off and re-roof of existing detached garage, to be replaced with Malarkey Legacy Naturalwood. See HIS2018-00101 for historic approval. | $1,356 | [RFG2018-00016](https://nearbypermits.com/boulder/permit/RFG2018-00016/) | | Feb 24, 2016 | Roofing | Tear-off & reroof of SFD, 22.33 squares of asphalt shingles on a pitch represented as 12/12 on original roof. New roof under addition permit. Shingles to comply with ASTM D225 or D3462 and D3161 Class F. Wrappers shall bear a label demonstrating compliance with ASTM D 3161, Class F; or ASTM D 7158, | $7,800 | [PMT2016-00785-RFG](https://nearbypermits.com/boulder/permit/PMT2016-00785-RFG/) | | Jul 27, 2015 | Plumbing | One story addition of 315 sf to existing single family residence for new master suite. Includes 25 sf of remodel to relocate shower and washer/dryer. Includes associated MEP. See HIS2015-02229 for LAC. | $4,000 | [PMT2015-02229-PLB](https://nearbypermits.com/boulder/permit/PMT2015-02229-PLB/) | | Jul 27, 2015 | Mechanical (HVAC) | One story addition of 315 sf to existing single family residence for new master suite. Includes 25 sf of remodel to relocate shower and washer/dryer. Includes associated MEP. See HIS2015-02229 for LAC. | $300 | [PMT2015-02229-MEC](https://nearbypermits.com/boulder/permit/PMT2015-02229-MEC/) | | Jul 27, 2015 | Electrical | One story addition of 315 sf to existing single family residence for new master suite. Includes 25 sf of remodel to relocate shower and washer/dryer. Includes associated MEP. See HIS2015-02229 for LAC. | $1,000 | [PMT2015-02229-ELE](https://nearbypermits.com/boulder/permit/PMT2015-02229-ELE/) | | Jul 27, 2015 | Addition | One story addition of 315 sf to existing single family residence for new master suite. Includes 25 sf of remodel to relocate shower and washer/dryer. Includes associated MEP. See HIS2015-02229 for LAC. | $84,050 | [PMT2015-02229](https://nearbypermits.com/boulder/permit/PMT2015-02229/) | | Dec 12, 2002 | Mechanical (HVAC) | Install 115,000 BTU replacement forced air furnace. | $1,706 | [PMT2002-05146-MEC](https://nearbypermits.com/boulder/permit/PMT2002-05146-MEC/) | | Oct 12, 1989 | Roofing | Roofing reroof - asphalt shingles | $1,150 | [PMT1989-P6099-RFG](https://nearbypermits.com/boulder/permit/PMT1989-P6099-RFG/) | | Jun 17, 1988 | Fence, wall or deck | Fence 6 foot wood fence | $2,000 | [PMT1988-M9082-FEN](https://nearbypermits.com/boulder/permit/PMT1988-M9082-FEN/) | ## 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 Marine St with permits, nearest house number first: - [505 Marine St](https://nearbypermits.com/boulder/address/505-marine-st/): newest permit Jul 31, 2026 - [504 Marine St](https://nearbypermits.com/boulder/address/504-marine-st/): newest permit Sep 10, 2026 - [540 Marine St](https://nearbypermits.com/boulder/address/540-marine-st/): newest permit Dec 19, 2025 - [558 Marine St](https://nearbypermits.com/boulder/address/558-marine-st/): newest permit Jun 3, 2026 - [601 Marine St](https://nearbypermits.com/boulder/address/601-marine-st/): newest permit Apr 2, 2026 - [434 Marine St](https://nearbypermits.com/boulder/address/434-marine-st/): newest permit Aug 14, 2025 - [611 Marine St](https://nearbypermits.com/boulder/address/611-marine-st/): newest permit Nov 12, 2025 - [619 Marine St 2](https://nearbypermits.com/boulder/address/619-marine-st-2/): newest permit Jul 1, 2025 - [623 Marine St](https://nearbypermits.com/boulder/address/623-marine-st/): newest permit Jul 13, 2026 - [625 Marine St](https://nearbypermits.com/boulder/address/625-marine-st/): newest permit Mar 26, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-09 19:27 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 11 permits at this address: https://nearbypermits.com/boulder/address/520-marine-st/