420 S 42nd St

Boulder, CO 80305

At this address

4 permits on record. Newest issued Mar 4, 2025: Replacement furnace 97% AFUE 70,000 BTU

Within ¼ mile

Boulder publishes permits without map coordinates, so this address has no map and no quarter-mile list.

1. Replacement furnace 97% AFUE 70,000 BTU

   Mechanical (HVAC)
   Mar 4, 2025$15,482
2. Replacement residential electrical service, 200 amps

   Electrical
   Aug 15, 2012$3,819
3. Total tear off and reroof of existing single family dwelling

   Roofing
   Sep 17, 2010$5,569
4. Replacement Forced Air Furnace, New Comfort Cooling

   Mechanical (HVAC)
   Jun 22, 2005$4,582

We don't list zoning cases for Boulder yet. Look them up on the city's Board of Zoning Adjustment page.

• 425 S 42nd St newest permit Oct 24, 2025
• 430 S 42nd St newest permit May 22, 2026
• 375 S 42nd St newest permit May 15, 2026
• 365 S 42nd St newest permit Dec 16, 2025
• 360 S 42nd St newest permit Jun 2, 2026
• 345 S 42nd St newest permit May 8, 2026
• 520 S 42nd St newest permit May 14, 2026
• 530 S 42nd St newest permit Mar 17, 2026
• 540 S 42nd St newest permit Sep 4, 2026
• 545 S 42nd St newest permit Sep 1, 2026

Boulder Planning and Development Services updated its data Oct 11, 2026. We checked it Oct 11, 23:54 UTC. See the city's official records.

At this address: every permit the city holds. Nearby: permits from the last two years, from our copy of the city's data.

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