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Solar permits in Rockville, MD

Data through September 2026 · updated 20 Oct 2026

294 solar permits were issued in Rockville, October 2024 through September 2026: about 147 a year and 5% of all permits. 174 solar permits in the last 12 months (Oct 2025–Sep 2026), 45% more than the 120 in the 12 months before. The busiest month is September. 20850 has the most, 146.

294permits issued
174last 12 months
Sepbusiest month
92%finished
Sep 2026records through

Solar permits by month

Permits issued each month, October 2024 through September 2026.

Oct 2024: 14Oct2024Nov 2024: 9Dec 2024: 6Jan 2025: 11Jan2025Feb 2025: 6Mar 2025: 4Apr 2025: 7May 2025: 10Jun 2025: 6Jul 2025: 13JulAug 2025: 7Sep 2025: 27Oct 2025: 24Nov 2025: 30Dec 2025: 7Jan 2026: 9Jan2026Feb 2026: 5Mar 2026: 9Apr 2026: 19May 2026: 14Jun 2026: 15Jul 2026: 13JulAug 2026: 14Sep 2026: 15
The same numbers as a table
MonthPermits
Oct 202414
Nov 20249
Dec 20246
Jan 202511
Feb 20256
Mar 20254
Apr 20257
May 202510
Jun 20256
Jul 202513
Aug 20257
Sep 202527
Oct 202524
Nov 202530
Dec 20257
Jan 20269
Feb 20265
Mar 20269
Apr 202619
May 202614
Jun 202615
Jul 202613
Aug 202614
Sep 202615

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When solar permits are filed

By calendar month, 100 = an average month (the thin line). September is the busiest (171), February the quietest (45). A busy month at the permit counter usually means a longer wait for a contractor.

January: 82 (100 = an average month)February: 45 (100 = an average month)March: 53 (100 = an average month)April: 106 (100 = an average month)May: 98 (100 = an average month)June: 86 (100 = an average month)July: 106 (100 = an average month)August: 86 (100 = an average month)September: 171 (100 = an average month)171October: 155 (100 = an average month)November: 159 (100 = an average month)December: 53 (100 = an average month)JFMAMJJASOND
The same numbers as a table
MonthIndex
January82
February45
March53
April106
May98
June86
July106
August86
September171
October155
November159
December53

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How many solar permits get finished

Permits issued Oct 2024–Sep 2025, at least 12 months before the file ends.

MeasureValue
Permits issued Oct 2024–Sep 2025120
Finished91.7%
Expired8.3%

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ZIP codes with the most solar permits

Counted at the property's ZIP code. Share is the part of the city's 294 solar permits.

ZIP codePermitsShare
2085014650%
208517626%
208544214%
20852269%
207051under 1%
208201under 1%

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The city's own permit types

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

Permit typePermitsShare
Solar Panel - Roof25386%
Solar App Plus3512%
Electrical Permit52%
Electric Vehicle Charger (R)1under 1%

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Most active contractors by permits filed

The contractors named on the most solar permits in the City of Rockville MGO permit file, October 2024 through September 2026, with 5 or more each. Share is the part of all 294 solar permits; 97% of them name a contractor we can show. This is volume, not quality: more permits doesn't mean better work. Individuals' names, owner-builders and blanks are left out.

ContractorPermitsShare
Solar Energy World LLC5719%
Fusion Solar Services3010%
Freedom Forever Maryland LLC279%
Edge Energy259%
Sunrun Installation Services Inc.238%
Greenbrilliance LLC124%
D & L Clean Power Solutions LLC114%
Standard Energy Solutions103%
Fusion Solar Services LLC/Lumina Solar Services72%
Venture Home Solar, LLC72%

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Guides for this kind of work

All guides →

Other kinds of work here

Plumbing (1,636)Electrical (942)HVAC (880)Fences & walls (301)

How Rockville compares with other cities

From our cross-city data studies: the same measure, read the same way, for every city we cover.

Nearby permit data

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

Arlington, VAWashington, DCFairfax County, VAMontgomery County, MDPrince George's County, MDHoward County, MD

How these numbers are made

Source: City of Rockville MGO permit map layer (MGO_Permit_View, ArcGIS), read 20 Oct 2026. We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out.

Building, trade, fence, sign and fire-protection permits the City of Rockville issues inside the city limits. Montgomery County's Department of Permitting Services covers the rest of the county, so a Rockville mailing address outside the city is not in this file. Plumbing and gas-service connections that WSSC Water permits are not in it either.

  • The city's permit layer names a contractor company on only about a third of permits; many others list a permit expediter or the owner as applicant, which we don't treat as the contractor.
  • The layer has no issue date, so a permit is dated by the day its case was opened; cases still under review, awaiting payment or approved but not yet issued are not counted.
  • The layer's job value is zero on every permit and it has no final inspection date, so we show no costs and no time to final.
  • Rockville moved to its current permit system (MyGovernmentOnline) in late October 2021; older permits are not in the layer.
  • Gas appliance hook-ups (stoves, ranges, dryers) that the city files as mechanical permits are counted as plumbing (gas line) work; furnace, air-conditioner and heat-pump jobs are HVAC.
  • Fire sprinkler and alarm permits, signs and commercial tenant fit-outs are counted under Other.

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 Rockville, MD", https://contractorrecords.com/rockville/solar-permits, data through September 2026, from City of Rockville Inspection Services building-permit records.

Link to a table: By month · Season · How many get finished · By ZIP code · Permit types · Most active contractors by permits filed.

Download the tables (CSV): Solar permits by month · Solar permits by calendar month (index) · Solar permits: finished share · Solar permits by ZIP code · Solar permits by permit type · Most active contractors by permits filed.

Common questions

  • How many solar permits does Rockville issue a year?About 147 a year in Rockville: 294 permits issued October 2024 through September 2026, 174 of them in the last 12 months.
  • When do people in Rockville file the most solar permits?September (171 against an average month of 100); February is the quietest (45). If you can choose, a quiet month at the permit counter can mean contractors have more room in their schedules.
  • Which ZIP code has the most solar permits in Rockville?20850, with 146 of the 294 (50%); then 20851 (76).
Rockville permit data →Rockville permit statistics →Browse Rockville solar permits →