# Building permits at 320 20th St, Boulder, CO 19 permits on record here. The newest, Jun 18: Install 27kWh Tesla Powerwall Energy Storage System. 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 | |---|---|---|---|---| | Jun 18, 2026 | Electrical | Install 27kWh Tesla Powerwall Energy Storage System. The PV system is existing. | $22,232 | [ELE2026-00520](https://nearbypermits.com/boulder/permit/ELE2026-00520/) | | Sep 9, 2020 | Addition | Two story addition on existing foundation with refinish of existing basement. 2nd floor addition includes master suite of 619 sq. ft.; main level 1,705 sq. ft. rebuild of existing living/dining/kitchen, basement includes reconstruction of 1,612 sq. ft. of bedrooms and rec room. SEE BOZ2017-00015 FOR | $481,000 | [PMT2017-05603](https://nearbypermits.com/boulder/permit/PMT2017-05603/) | | Sep 9, 2020 | New building | *Voided for inactivity - no inspections within 180 days* New detached garage with attached carport associated with a new single family detached dwelling under PMT2017-05603 (separate plan sets). Garage to be heated and will contain a half bath. | $97,200 | [BLD-ACC2018-00005](https://nearbypermits.com/boulder/permit/BLD-ACC2018-00005/) | | Apr 3, 2020 | Fence, wall or deck | Floodplain development permit for proposed 6'-0" fence to be located within the 100 year floodplain. | Not listed | [FLD2020-00023](https://nearbypermits.com/boulder/permit/FLD2020-00023/) | | Sep 27, 2019 | New building | Installation of an in-ground pre-cast spa, associated heater and pump on an equipment pad, located between rear of residence and detached garage, for a single family detached dwelling with small deck alongside. | $45,000 | [BLD-ACC2019-00073](https://nearbypermits.com/boulder/permit/BLD-ACC2019-00073/) | | Mar 26, 2019 | Electrical | *Electronic submittal - Installation of a grid-tied, flush roof mounted 3.65 kW PV system with 10 modules on the roof of a new garage/carport. Array will be on a flat roof, but not tilted. PV system required for energy modeling score for the single family dwelling under PMT2017-05603. A system of 2. | $14,461 | [ELE2019-00284](https://nearbypermits.com/boulder/permit/ELE2019-00284/) | | Aug 8, 2018 | Plumbing | Two story addition on existing foundation with refinish of existing basement. 2nd floor addition includes master suite of 619 sq. ft.; main level 1,705 sq. ft. rebuild of existing living/dining/kitchen, basement includes reconstruction of 1,612 sq. ft. of bedrooms and rec room. See boz2017-00015 for | $25,000 | [PMT2017-05603-PLB](https://nearbypermits.com/boulder/permit/PMT2017-05603-PLB/) | | Aug 8, 2018 | Mechanical (HVAC) | Two story addition on existing foundation with refinish of existing basement. 2nd floor addition includes master suite of 619 sq. ft.; main level 1,705 sq. ft. rebuild of existing living/dining/kitchen, basement includes reconstruction of 1,612 sq. ft. of bedrooms and rec room. See boz2017-00015 for | $42,500 | [PMT2017-05603-MEC](https://nearbypermits.com/boulder/permit/PMT2017-05603-MEC/) | | Aug 8, 2018 | Electrical | Two story addition on existing foundation with refinish of existing basement. 2nd floor addition includes master suite of 619 sq. ft.; main level 1,705 sq. ft. rebuild of existing living/dining/kitchen, basement includes reconstruction of 1,612 sq. ft. of bedrooms and rec room. See boz2017-00015 for | $24,000 | [PMT2017-05603-ELE](https://nearbypermits.com/boulder/permit/PMT2017-05603-ELE/) | | Jul 31, 2018 | Plumbing | *Voided for inactivity due to no inspections performed within 180 days of issuance.* New detached garage with attached carport associated with a new single family detached dwelling under | $3,000 | [PLB2018-00033](https://nearbypermits.com/boulder/permit/PLB2018-00033/) | | Jul 31, 2018 | Mechanical (HVAC) | *Voided for inactivity due to no inspections performed within 180 days of issuance.*New detached garage with attached carport associated with a new single family detached dwelling under | $1,000 | [MEC2018-00068](https://nearbypermits.com/boulder/permit/MEC2018-00068/) | | Jul 31, 2018 | Electrical | *Voided for inactivity due to no inspections performed within 180 days of issuance.*New detached garage with attached carport associated with a new single family detached dwelling under | $4,200 | [ELE2018-00056](https://nearbypermits.com/boulder/permit/ELE2018-00056/) | | Feb 2, 2018 | Electrical | Temporary Construction Power associated with 2 story addition (from foundation) approved throguh PMT2017-05603. | Not listed | [PMT2018-00427-ELE](https://nearbypermits.com/boulder/permit/PMT2018-00427-ELE/) | | Dec 14, 2017 | Demolition | *Voided for inactivity due to no inspections performed within 180 days of issuance.*Full single family detached dwelling demolition leaving the basement foundation. Detached garage not part of this demo permit. | Not listed | [PMT2017-05526-DEM](https://nearbypermits.com/boulder/permit/PMT2017-05526-DEM/) | | Jun 10, 2008 | Plumbing | 2-story addition & remodel. Remodel of an existing 3,156 sf, new 1st floor addition of 313 sf, 2nd floor addition of 1,240 sf to include 3 bedrooms, 2 full bathrooms & relocated laundry station. New patio of 160 sf. See ADR2007-00153 for set back variance. Project specialists - only re-route to buil | $12,000 | [PMT2007-05486-PLB](https://nearbypermits.com/boulder/permit/PMT2007-05486-PLB/) | | Jun 10, 2008 | Mechanical (HVAC) | 2-story addition & remodel. Remodel of an existing 3,156 sf, new 1st floor addition of 313 sf, 2nd floor addition of 1,240 sf to include 3 bedrooms, 2 full bathrooms & relocated laundry station. New patio of 160 sf. See ADR2007-00153 for set back variance. Project specialists - only re-route to buil | $10,000 | [PMT2007-05486-MEC](https://nearbypermits.com/boulder/permit/PMT2007-05486-MEC/) | | Jun 10, 2008 | Electrical | 2-story addition & remodel. Remodel of an existing 3,156 sf, new 1st floor addition of 313 sf, 2nd floor addition of 1,240 sf to include 3 bedrooms, 2 full bathrooms & relocated laundry station. New patio of 160 sf. See ADR2007-00153 for set back variance. Project specialists - only re-route to buil | $15,000 | [PMT2007-05486-ELE](https://nearbypermits.com/boulder/permit/PMT2007-05486-ELE/) | | Jun 10, 2008 | Addition | 2-story addition & remodel. Remodel of an existing 3,156 sf, new 1st floor addition of 313 sf, 2nd floor addition of 1,240 sf to include 3 bedrooms, 2 full bathrooms & relocated laundry station. New patio of 160 sf. See ADR2007-00153 for set back variance. Project specialists - only re-route to buil | $284,042 | [PMT2007-05486](https://nearbypermits.com/boulder/permit/PMT2007-05486/) | | Dec 12, 2000 | Mechanical (HVAC) | Replace forced air furnace. | $1,925 | [PMT2000-04974-MEC](https://nearbypermits.com/boulder/permit/PMT2000-04974-MEC/) | ## More on this street Other addresses on 20th St with permits, nearest house number first: - [460 20th St](https://nearbypermits.com/boulder/address/460-20th-st/): newest permit Feb 20, 2026 - [735 20th St](https://nearbypermits.com/boulder/address/735-20th-st/): newest permit Jun 16, 2026 - [751 20th St](https://nearbypermits.com/boulder/address/751-20th-st/): newest permit Jul 30, 2026 - [864 20th St](https://nearbypermits.com/boulder/address/864-20th-st/): newest permit Jul 14, 2026 - [1513 20th St](https://nearbypermits.com/boulder/address/1513-20th-st/): newest permit Jan 8, 2026 - [2322 20th St](https://nearbypermits.com/boulder/address/2322-20th-st/): newest permit Aug 3, 2026 - [2800 20th St](https://nearbypermits.com/boulder/address/2800-20th-st/): newest permit Jun 25, 2025 - [2810 20th St](https://nearbypermits.com/boulder/address/2810-20th-st/): newest permit Jan 13, 2026 - [2831 20th St](https://nearbypermits.com/boulder/address/2831-20th-st/): newest permit Dec 18, 2024 - [2840 20th St](https://nearbypermits.com/boulder/address/2840-20th-st/): newest permit Jun 24, 2026 --- Source: Boulder Planning and Development Services permit data (https://www.arcgis.com/home/item.html?id=e3ff6248e4a547bcba31025d2c5c9fee). Checked 2026-10-07 01:07 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/ All 19 permits at this address: https://nearbypermits.com/boulder/address/320-20th-st/