# Building permits at 1920 Mapleton Ave, Boulder, CO 15 permits on record here. The newest, Sep 3, 2025: Two story Plumis ADU retro fits with 4 heads (PLUMIS). 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 | |---|---|---|---|---| | Sep 3, 2025 | Fire systems | Two story Plumis ADU retro fits with 4 heads (PLUMIS) | $9,100 | [FIR2025-00329](https://nearbypermits.com/boulder/permit/FIR2025-00329/) | | Jun 30, 2025 | Electrical | Roof-mounted solar installation 4.86 kW DC | $15,358 | [ELE2025-00524](https://nearbypermits.com/boulder/permit/ELE2025-00524/) | | Jun 23, 2025 | Fence, wall or deck | 8/4/25 Revision to include Kitchen layout change, changes to bathroom and fire suppresion Conversion of partial 1st floor (235 sf) and full 2nd floor (311) to detached ADU. Scope includes: new stair per code; new heat pump; new windows; new kitchen; previously unpermitted bath/toilet. ADU approved u | $45,689 | [BLD-ACC2025-00005](https://nearbypermits.com/boulder/permit/BLD-ACC2025-00005/) | | Sep 27, 2023 | Addition | Re-issuance of expired permit PMT2001-00471 and completion of inspections for interior remodel and adding a second story (two bedrooms and a bath). Enclosed entry porch on rear of structure. Kitchen pop-out on west side. Converting duplex to a single-family dwelling. All inspections previously compl | $140,000 | [BLD-SFD2023-00006](https://nearbypermits.com/boulder/permit/BLD-SFD2023-00006/) | | Aug 21, 2023 | Mechanical (HVAC) | Void- No activity in 1280 days. Install 2 ton heat pump | $11,923 | [MEC2023-00838](https://nearbypermits.com/boulder/permit/MEC2023-00838/) | | May 31, 2001 | Mechanical (HVAC) | Second floor study/bedroom addition toward front of structure.. Home owner to be own general contractor. Per call to homeowner 1/2 bath is also being added. | $1,200 | [PMT2001-01562-MEC](https://nearbypermits.com/boulder/permit/PMT2001-01562-MEC/) | | May 31, 2001 | Electrical | Second floor study/bedroom addition toward front of structure.. Home owner to be own general contractor. Per call to homeowner 1/2 bath is also being added. | $700 | [PMT2001-01562-ELE](https://nearbypermits.com/boulder/permit/PMT2001-01562-ELE/) | | May 31, 2001 | Addition | Second floor study/bedroom addition toward front of structure.. Home owner to be own general contractor. Per call to homeowner 1/2 bath is also being added. | $21,200 | [PMT2001-01562](https://nearbypermits.com/boulder/permit/PMT2001-01562/) | | Apr 12, 2001 | Plumbing | Interior remodel and adding a second story (two bedrooms and a bath). Enclosed entry porch on rear of structure. Kitchen pop-out on west side. Converting duplex to a single family dwelling. | $2,400 | [PMT2001-00471-PLB](https://nearbypermits.com/boulder/permit/PMT2001-00471-PLB/) | | Apr 12, 2001 | Mechanical (HVAC) | Interior remodel and adding a second story (two bedrooms and a bath). Enclosed entry porch on rear of structure. Kitchen pop-out on west side. Converting duplex to a single family dwelling. | $7,000 | [PMT2001-00471-MEC](https://nearbypermits.com/boulder/permit/PMT2001-00471-MEC/) | | Apr 12, 2001 | Electrical | Interior remodel and adding a second story (two bedrooms and a bath). Enclosed entry porch on rear of structure. Kitchen pop-out on west side. Converting duplex to a single family dwelling. | $7,800 | [PMT2001-00471-ELE](https://nearbypermits.com/boulder/permit/PMT2001-00471-ELE/) | | Apr 12, 2001 | Addition | Interior remodel and adding a second story (two bedrooms and a bath). Enclosed entry porch on rear of structure. Kitchen pop-out on west side. Converting duplex to a single family dwelling. | $62,800 | [PMT2001-00471](https://nearbypermits.com/boulder/permit/PMT2001-00471/) | | Feb 12, 2001 | Demolition | Interior demo and parcial exterior demo | Not listed | [PMT2001-00472-DEM](https://nearbypermits.com/boulder/permit/PMT2001-00472-DEM/) | | Feb 16, 1995 | Alteration or repair | Detached two car garage with storage loft above (n the original general permit | $10,000 | [PMT1995-01208](https://nearbypermits.com/boulder/permit/PMT1995-01208/) | | Jan 30, 1995 | Alteration or repair | Change single panel fixed windows to insulated dbl the original general permit | $2,800 | [PMT1995-00731](https://nearbypermits.com/boulder/permit/PMT1995-00731/) | ## More on this street Other addresses on Mapleton Ave with permits, nearest house number first: - [1928 Mapleton Ave](https://nearbypermits.com/boulder/address/1928-mapleton-ave/): newest permit Jun 18, 2026 - [1836 Mapleton Ave](https://nearbypermits.com/boulder/address/1836-mapleton-ave/): newest permit Apr 7, 2026 - [2004 Mapleton Ave](https://nearbypermits.com/boulder/address/2004-mapleton-ave/): newest permit Sep 2, 2026 - [1829 Mapleton Ave](https://nearbypermits.com/boulder/address/1829-mapleton-ave/): newest permit Mar 6, 2026 - [1804 Mapleton Ave](https://nearbypermits.com/boulder/address/1804-mapleton-ave/): newest permit Mar 26, 2026 - [1803 Mapleton Ave](https://nearbypermits.com/boulder/address/1803-mapleton-ave/): newest permit Feb 10, 2026 - [2053 Mapleton Ave](https://nearbypermits.com/boulder/address/2053-mapleton-ave/): newest permit May 2, 2025 - [2103 Mapleton Ave](https://nearbypermits.com/boulder/address/2103-mapleton-ave/): newest permit May 1, 2025 - [2104 Mapleton Ave](https://nearbypermits.com/boulder/address/2104-mapleton-ave/): newest permit Jul 28, 2025 - [2105 Mapleton Ave](https://nearbypermits.com/boulder/address/2105-mapleton-ave/): newest permit Nov 13, 2024 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 02:55 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 15 permits at this address: https://nearbypermits.com/boulder/address/1920-mapleton-ave/