# Building permits at 4671 18th St, Boulder, CO 12 permits on record here. The newest, Jul 11, 2025: Reroof triplex with class 4 asphalt shingles. 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 11, 2025 | Roofing | Reroof triplex with class 4 asphalt shingles. Units 4671, 4673, and 4675. 48 SQs. Total tear-off & reroof of SFD, 48 squares of dimensional shingles on a pitch represented as 9/12. All roof materials shall be installed per manufacturer?s specs. Mid-roof inspection is required if 1) pitch is less tha | $18,535 | [RFG2025-00491](https://nearbypermits.com/boulder/permit/RFG2025-00491/) | | May 10, 2000 | Plumbing | basement finish | $930 | [PMT2000-01696-PLB](https://nearbypermits.com/boulder/permit/PMT2000-01696-PLB/) | | May 10, 2000 | Mechanical (HVAC) | basement finish | $465 | [PMT2000-01696-MEC](https://nearbypermits.com/boulder/permit/PMT2000-01696-MEC/) | | May 10, 2000 | Electrical | basement finish | $710 | [PMT2000-01696-ELE](https://nearbypermits.com/boulder/permit/PMT2000-01696-ELE/) | | May 10, 2000 | Alteration or repair | basement finish | $8,000 | [PMT2000-01696](https://nearbypermits.com/boulder/permit/PMT2000-01696/) | | Mar 22, 1999 | Electrical | Electrical | $8,940 | [PMT1999-02349-ELE](https://nearbypermits.com/boulder/permit/PMT1999-02349-ELE/) | | Jan 12, 1999 | Mechanical (HVAC) | Mechanical | $5,850 | [PMT1999-00354-MEC](https://nearbypermits.com/boulder/permit/PMT1999-00354-MEC/) | | Jan 12, 1999 | Plumbing | Plumbing | $7,425 | [PMT1999-00353-PLB](https://nearbypermits.com/boulder/permit/PMT1999-00353-PLB/) | | Jan 7, 1999 | Plumbing | New 3 Unit apartment building - total 9BR, 6BA - unfinished basements, no garages. Includes residential addresses 4671, 4673, 4675 18th st - together referred to as Building L. Includes permits for plumbing (990353), mechanical (990354) and electrical (992349). | $7,425 | [PMT1998-08476-PLB](https://nearbypermits.com/boulder/permit/PMT1998-08476-PLB/) | | Jan 7, 1999 | Mechanical (HVAC) | New 3 Unit apartment building - total 9BR, 6BA - unfinished basements, no garages. Includes residential addresses 4671, 4673, 4675 18th st - together referred to as Building L. Includes permits for plumbing (990353), mechanical (990354) and electrical (992349). | $5,850 | [PMT1998-08476-MEC](https://nearbypermits.com/boulder/permit/PMT1998-08476-MEC/) | | Jan 7, 1999 | Electrical | New 3 Unit apartment building - total 9BR, 6BA - unfinished basements, no garages. Includes residential addresses 4671, 4673, 4675 18th st - together referred to as Building L. Includes permits for plumbing (990353), mechanical (990354) and electrical (992349). | $8,940 | [PMT1998-08476-ELE](https://nearbypermits.com/boulder/permit/PMT1998-08476-ELE/) | | Jan 7, 1999 | New building | New 3 Unit apartment building - total 9BR, 6BA - unfinished basements, no garages. Includes residential addresses 4671, 4673, 4675 18th st - together referred to as Building L. Includes permits for plumbing (990353), mechanical (990354) and electrical (992349). | $248,434 | [PMT1998-08476](https://nearbypermits.com/boulder/permit/PMT1998-08476/) | ## More on this street Other addresses on 18th St with permits, nearest house number first: - [4673 18th St](https://nearbypermits.com/boulder/address/4673-18th-st/): newest permit Aug 22, 2025 - [4618 18th St](https://nearbypermits.com/boulder/address/4618-18th-st/): newest permit Oct 2, 2025 - [4730 18th St](https://nearbypermits.com/boulder/address/4730-18th-st/): newest permit Jun 17, 2025 - [3175 18th St](https://nearbypermits.com/boulder/address/3175-18th-st/): newest permit Nov 5, 2025 - [3075 18th St](https://nearbypermits.com/boulder/address/3075-18th-st/): newest permit Jan 28, 2026 - [3060 18th St](https://nearbypermits.com/boulder/address/3060-18th-st/): newest permit Jan 14, 2026 - [3050 18th St](https://nearbypermits.com/boulder/address/3050-18th-st/): newest permit Aug 26, 2026 - [3040 18th St](https://nearbypermits.com/boulder/address/3040-18th-st/): newest permit Jun 9, 2026 - [3035 18th St](https://nearbypermits.com/boulder/address/3035-18th-st/): newest permit Dec 3, 2025 - [3025 18th St](https://nearbypermits.com/boulder/address/3025-18th-st/): newest permit Jun 1, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 07:49 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 12 permits at this address: https://nearbypermits.com/boulder/address/4671-18th-st/