# Building permits at 4618 18th St, Boulder, CO

Eight permits on record here. The newest, Oct 2, 2025: Installing 2X ducted ASHP 3-ton Condenser #1 location: in side yard replacing A/C 3-ton AHU replaces furnace. 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 |
|---|---|---|---|---|
| Oct 2, 2025 | Mechanical (HVAC) | Installing 2X ducted ASHP 3-ton Condenser #1 location: in side yard replacing A/C 3-ton AHU replaces furnace, location: basement 2.5-ton Condenser #2 location: in side yard replacing A/C 2.5-ton AHU replaces furnace, location: attic. To include electrical 1. 30A, 240V circuit w/ a 6ft whip plus 40"  | $23,244 | [MEC2025-01619](https://nearbypermits.com/boulder/permit/MEC2025-01619/) |
| Jun 4, 2012 | Fire systems | Scope of Work Letter Addition of Three New Sprinkler Heads | $350 | [PMT2012-02215-FIR](https://nearbypermits.com/boulder/permit/PMT2012-02215-FIR/) |
| Apr 17, 2012 | Electrical | Installation of 6.125 kw, rooftop, flushmounted, grid-tied, photovoltaic solar energy system on single-family residence. | $34,500 | [PMT2012-01804-ELE](https://nearbypermits.com/boulder/permit/PMT2012-01804-ELE/) |
| Aug 10, 2006 | Fence, wall or deck | Installation of cedar fence in front, side, and rear yards of single-family residence. Fence to be 3-feet in height in the front yard and 4-feet in height in the side and rear yards, 249-feet in total length. | $3,200 | [PMT2006-03289-FEN](https://nearbypermits.com/boulder/permit/PMT2006-03289-FEN/) |
| Apr 3, 2006 | Plumbing | New single family detached dwelling with 3,697 total square feet, finished basement, and an attached garage. Three bedrooms and 3 1/2 baths including one rough-in. Lot 25 Sanitas Terrace. | $7,142 | [PMT2005-04696-PLB](https://nearbypermits.com/boulder/permit/PMT2005-04696-PLB/) |
| Apr 3, 2006 | Mechanical (HVAC) | New single family detached dwelling with 3,697 total square feet, finished basement, and an attached garage. Three bedrooms and 3 1/2 baths including one rough-in. Lot 25 Sanitas Terrace. | $5,998 | [PMT2005-04696-MEC](https://nearbypermits.com/boulder/permit/PMT2005-04696-MEC/) |
| Apr 3, 2006 | Electrical | New single family detached dwelling with 3,697 total square feet, finished basement, and an attached garage. Three bedrooms and 3 1/2 baths including one rough-in. Lot 25 Sanitas Terrace. | $6,309 | [PMT2005-04696-ELE](https://nearbypermits.com/boulder/permit/PMT2005-04696-ELE/) |
| Apr 3, 2006 | New building | New single family detached dwelling with 3,697 total square feet, finished basement, and an attached garage. Three bedrooms and 3 1/2 baths including one rough-in. Lot 25 Sanitas Terrace. | $432,399 | [PMT2005-04696](https://nearbypermits.com/boulder/permit/PMT2005-04696/) |

## More on this street

Other addresses on 18th St with permits, nearest house number first:

- [4671 18th St](https://nearbypermits.com/boulder/address/4671-18th-st/): newest permit Jul 11, 2025
- [4673 18th St](https://nearbypermits.com/boulder/address/4673-18th-st/): newest permit Aug 22, 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

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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 04:55 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

All 8 permits at this address: https://nearbypermits.com/boulder/address/4618-18th-st/