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Solar permits in unincorporated Adams County, CO

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.

256permits issued
77last 12 months
Augbusiest month
Sep 2026records through

Solar permits by month

Permits issued each month, October 2024 through September 2026.

Oct 2024: 18Oct2024Nov 2024: 10Dec 2024: 8Jan 2025: 11Jan2025Feb 2025: 20Mar 2025: 11Apr 2025: 11May 2025: 12Jun 2025: 11Jul 2025: 11JulAug 2025: 32Sep 2025: 24Oct 2025: 18Nov 2025: 8Dec 2025: 6Jan 2026: 5Jan2026Feb 2026: 9Mar 2026: 6Apr 2026: 5May 2026: 1Jun 2026: 3Jul 2026: 6JulAug 2026: 4Sep 2026: 6
The same numbers as a table
MonthPermits
Oct 202418
Nov 202410
Dec 20248
Jan 202511
Feb 202520
Mar 202511
Apr 202511
May 202512
Jun 202511
Jul 202511
Aug 202532
Sep 202524
Oct 202518
Nov 20258
Dec 20256
Jan 20265
Feb 20269
Mar 20266
Apr 20265
May 20261
Jun 20263
Jul 20266
Aug 20264
Sep 20266

Download this table (CSV)

When solar permits are filed

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.

January: 75 (100 = an average month)February: 136 (100 = an average month)March: 80 (100 = an average month)April: 75 (100 = an average month)May: 61 (100 = an average month)June: 66 (100 = an average month)July: 80 (100 = an average month)August: 169 (100 = an average month)169September: 141 (100 = an average month)October: 169 (100 = an average month)November: 84 (100 = an average month)December: 66 (100 = an average month)JFMAMJJASOND
The same numbers as a table
MonthIndex
January75
February136
March80
April75
May61
June66
July80
August169
September141
October169
November84
December66

Download this table (CSV)

The county's own permit types

How the county filed these permits. We group its types into kinds of work; this is the split.

Permit typePermitsShare
Addition10943%
New3815%
Solar PV - New3212%
Alteration3112%
Solar PV - Addition197%
Solar PV - Alteration135%
Other - Alteration62%
Other - New31%
(type of work not given)31%
Solar Hydronic - New1under 1%

Download this table (CSV)

Nearby permit data

Solar permits for other places in Denver and Boulder. Each permit office keeps its own file, so the numbers are not added together.

How these numbers are made

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.

  • The county's permit layer names no contractor, so there are no contractor lists, rankings or firm pages for Adams County.
  • The layer has no issue date, so a permit is dated by the day its case was opened; cases still in review or waiting on fees are not counted.
  • There is no job value, no final inspection date and no ZIP code in the layer, so we show no costs, no time to final and no ZIP pages.
  • The type of work is blank on about a third of permits (mostly online re-roof and furnace or air-conditioner permits); for those the kind of work is read from the permit's description.

Counts are permits, not jobs: one job can need several permits. Nobody paid to be on this page and nobody can. Sources and definitions →

Cite this page

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.

Common questions

  • How many solar permits does Adams County issue a year?About 128 a year in unincorporated Adams County: 256 permits issued October 2024 through September 2026, 77 of them in the last 12 months.
  • When do people in Adams County file the most solar permits?August (169 against an average month of 100); May is the quietest (61). If you can choose, a quiet month at the permit counter can mean contractors have more room in their schedules.