REVISION 9/11/26- Revisions to the layout of the rooms and the foundation conditions under the exterior
Addition at 900 Maxwell Ave, Boulder
Boulder Planning and Development Services permit BLD-SFD2025-00023: issued Oct 17, 2025 for addition work at 900 Maxwell Ave. REVISION 9/11/26- Revisions to the layout of the rooms and the foundation conditions under the exterior stairwell. A 605 SF addition through a basement conversion from an existing uninhabitable space below the existing first floor. Some interior and exterior renovations are part of the scope of work such as new stairs and porch.
- Permit number
- BLD-SFD2025-00023
- Issued
- Type of work
- Addition
- Status
- Applied
- Reported cost
- $521,256
- ZIP code
- 80304
- City's category
- Building Permit - Single Family Detached Dwelling, Addition and Alteration
- City's status
- Revisions - Resubmit
- Source
- Boulder Planning and Development Services permit data (this record)
Type of work and status are our own standard labels, so permits compare across cities. The city's wording is in the "City's category" and "City's status" rows. We show costs under $100 as not listed, because filers often enter $0 or $1 when the city doesn't require a cost.
All permits at 900 Maxwell Ave, and what's permitted nearby
Boulder Planning and Development Services updated its data Oct 7, 2026. We checked it Oct 8, 03:10 UTC. See the city's official records.
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