Data through September 2026 · updated 20 Oct 2026
3,227 building permits were issued in ZIP code 20850 by City of Rockville Inspection Services, October 2024 through September 2026: 56% of the 5,779 in Rockville, the busiest ZIP code. Plumbing permits lead with 791. 1,656 permits in the last 12 months (Oct 2025–Sep 2026), 5% more than the 1,571 in the 12 months before. Permits from a city that runs its own permit office are not counted.
Share here is the part of the 3,227 permits in 20850; citywide is the same for all of Rockville.
| Kind of work | Permits | Share here | Citywide |
|---|---|---|---|
| Plumbing | 791 | 25% | 28% |
| HVAC | 522 | 16% | 15% |
| Electrical | 510 | 16% | 16% |
| Fences & walls | 154 | 5% | 5% |
| Solar | 146 | 5% | 5% |
| Garages, sheds & shade structures | 76 | 2% | 3% |
| Remodels & repairs | 64 | 2% | 2% |
| New homes | 62 | 2% | 1% |
| Demolition | 31 | under 1% | under 1% |
| Additions | 31 | under 1% | 1% |
| Roofing | 6 | under 1% | under 1% |
| ADUs & casitas | 5 | under 1% | under 1% |
| Pools & spas | 2 | under 1% | under 1% |
| Other | 827 | 26% | 22% |
Permits issued in each calendar year of the window.
| Year | Months | Permits | Per year |
|---|---|---|---|
| 2024 (from October) | 3 | 442 | 1,768 |
| 2025 | 12 | 1,541 | 1,541 |
| 2026 (through September) | 9 | 1,244 | 1,659 |
Permits issued Oct 2024–Sep 2025, at least 12 months before the file ends.
| Measure | 20850 | Citywide |
|---|---|---|
| Permits issued Oct 2024–Sep 2025 | 1,571 | 2,847 |
| Finished | 78.5% | 82.2% |
| Expired | 15.7% | 13.8% |
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 We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out.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.
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, "Building permits in 20850, Rockville", https://contractorrecords.com/rockville/zip/20850, data through September 2026, from City of Rockville Inspection Services building-permit records.Link to a table: By kind of work · By year · How permits finish.
Download the tables (CSV): Permits in 20850 by kind of work · Permits in 20850 by year · Permits in 20850: finished and days to final.