Data through September 2026 · updated 23 Oct 2026
256 solar permits were issued in unincorporated Adams County, October 2024 through September 2026: about 128 a year and 4% of all permits. 77 solar permits in the last 12 months (Oct 2025–Sep 2026), 57% fewer than the 179 in the 12 months before. The busiest month is August.
Permits issued each month, October 2024 through September 2026.
| Month | Permits |
|---|---|
| Oct 2024 | 18 |
| Nov 2024 | 10 |
| Dec 2024 | 8 |
| Jan 2025 | 11 |
| Feb 2025 | 20 |
| Mar 2025 | 11 |
| Apr 2025 | 11 |
| May 2025 | 12 |
| Jun 2025 | 11 |
| Jul 2025 | 11 |
| Aug 2025 | 32 |
| Sep 2025 | 24 |
| Oct 2025 | 18 |
| Nov 2025 | 8 |
| Dec 2025 | 6 |
| Jan 2026 | 5 |
| Feb 2026 | 9 |
| Mar 2026 | 6 |
| Apr 2026 | 5 |
| May 2026 | 1 |
| Jun 2026 | 3 |
| Jul 2026 | 6 |
| Aug 2026 | 4 |
| Sep 2026 | 6 |
By calendar month, 100 = an average month (the thin line). August is the busiest (169), May the quietest (61). A busy month at the permit counter usually means a longer wait for a contractor.
| Month | Index |
|---|---|
| January | 75 |
| February | 136 |
| March | 80 |
| April | 75 |
| May | 61 |
| June | 66 |
| July | 80 |
| August | 169 |
| September | 141 |
| October | 169 |
| November | 84 |
| December | 66 |
How the county filed these permits. We group its types into kinds of work; this is the split.
| Permit type | Permits | Share |
|---|---|---|
| Addition | 109 | 43% |
| New | 38 | 15% |
| Solar PV - New | 32 | 12% |
| Alteration | 31 | 12% |
| Solar PV - Addition | 19 | 7% |
| Solar PV - Alteration | 13 | 5% |
| Other - Alteration | 6 | 2% |
| Other - New | 3 | 1% |
| (type of work not given) | 3 | 1% |
| Solar Hydronic - New | 1 | under 1% |
Roofing (1,869)HVAC (1,169)Electrical (693)Remodels & repairs (549)New homes (327)Plumbing (320)Garages, sheds & shade structures (287)
Solar permits for other places in Denver and Boulder. Each permit office keeps its own file, so the numbers are not added together.
Denver, COBoulder, COBoulder County, COAurora, COCentennial, COThornton, COLongmont, CO
Source: Adams County, Building Permits Eye On Adams (ArcGIS layer), read 23 Oct 2026. We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out. The county's layer leaves most permits marked Permit Issued after the work is done, so no finished share is shown.
Permits the Adams County Building Division issues for unincorporated land only, such as Welby, Sherrelwood, Berkeley, Twin Lakes, Strasburg and the rural east. Thornton, Westminster, Commerce City, Brighton, Northglenn, Federal Heights, Arvada and Aurora issue their own permits and are not in this file.
Counts are permits, not jobs: one job can need several permits. Nobody paid to be on this page and nobody can. Sources and definitions →
Free to reuse with attribution (CC BY 4.0). Please credit Contractor Records and link to this page. Suggested citation:
Contractor Records, "Solar permits in unincorporated Adams County, CO", https://contractorrecords.com/adams-county/solar-permits, data through September 2026, from Adams County Community & Economic Development building-permit records.Link to a table: By month · Season · Permit types.
Download the tables (CSV): Solar permits by month · Solar permits by calendar month (index) · Solar permits by permit type.