645 S 42nd St

Boulder, CO 80305

At this address

8 permits on record. Newest issued Jun 12, 2025: Replace original casement window on the southeast side of the basement…

Within ¼ mile

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

1. Replace original casement window on the southeast side of the basement with a new egress window of 32 inches…

   Alteration or repair
   Jun 12, 2025$9,000
2. Kitchen Renovation with improvements to lighting and electrical

   Alteration or repair
   Aug 14, 2023$25,500
3. Add a bedroom and egress window (with well) within existing finished basement.U-factor on window shall not…

   Electrical
   Jan 24, 2002$400
4. Add a bedroom and egress window (with well) within existing finished basement.U-factor on window shall not…

   Alteration or repair
   Jan 24, 2002$3,000
5. Add covered front porch

   Electrical
   Nov 9, 2000not listed
6. Add covered front porch

   Addition
   Nov 9, 2000$4,800
7. Addition

   Addition
   Feb 7, 1989$10,500
8. Fence 6 foot or less wood fence

   Fence, wall or deck
   Feb 7, 1989$500

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

• 640 S 42nd St newest permit Aug 5, 2026
• 655 S 42nd St newest permit Mar 20, 2025
• 660 S 42nd St newest permit Apr 24, 2026
• 620 S 42nd St newest permit Aug 6, 2026
• 615 S 42nd St newest permit Jan 22, 2026
• 720 S 42nd St newest permit Jun 18, 2025
• 550 S 42nd St newest permit Jun 22, 2026
• 740 S 42nd St newest permit Jul 18, 2025
• 545 S 42nd St newest permit Sep 1, 2026
• 540 S 42nd St newest permit Sep 4, 2026

Boulder Planning and Development Services updated its data Oct 8, 2026. We checked it Oct 9, 08:42 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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