Data through September 2026 · updated 20 Oct 2026
1,783 building permits were issued in ZIP code 21128 by Baltimore County Permits, Approvals and Inspections, October 2024 through September 2026: 2% of the 72,744 in Baltimore County, the 19th busiest ZIP code. Plumbing permits lead with 581. 1,191 permits in the last 12 months (Oct 2025–Sep 2026), 101% more than the 592 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 1,783 permits in 21128; countywide is the same for all of Baltimore County.
| Kind of work | Permits | Share here | Countywide |
|---|---|---|---|
| Plumbing | 581 | 33% | 31% |
| Electrical | 571 | 32% | 35% |
| New homes | 158 | 9% | 3% |
| HVAC | 94 | 5% | 7% |
| Garages, sheds & shade structures | 81 | 5% | 4% |
| Fences & walls | 57 | 3% | 4% |
| Solar | 43 | 2% | 2% |
| Remodels & repairs | 14 | under 1% | 2% |
| Additions | 11 | under 1% | 1% |
| Pools & spas | 8 | under 1% | under 1% |
| Demolition | 4 | under 1% | under 1% |
| Other | 161 | 9% | 9% |
Permits issued in each calendar year of the window.
| Year | Months | Permits | Per year |
|---|---|---|---|
| 2024 (from October) | 3 | 147 | 588 |
| 2025 | 12 | 646 | 646 |
| 2026 (through September) | 9 | 990 | 1,320 |
Permits issued Oct 2024–Sep 2025, at least 12 months before the file ends.
| Measure | 21128 | Countywide |
|---|---|---|
| Permits issued Oct 2024–Sep 2025 | 592 | 36,255 |
| Finished | 55.6% | 52.5% |
| Expired | 0.0% | 0.4% |
Source: Baltimore County GIS, Active Development map service: Cityworks Permits, Electrical Permits, Plumbing Permits and Gas Permits layers, read 20 Oct 2026. We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out.
Building, electrical, plumbing and gas permits issued by Baltimore County Permits, Approvals and Inspections, which covers the whole county (it has no incorporated towns): Towson, Catonsville, Dundalk, Essex, Parkville, Pikesville, Owings Mills, Randallstown, Perry Hall, White Marsh and the rest. Baltimore City is a separate jurisdiction with its own permit office and is not in this file; the few trade permits whose ZIP code lies wholly inside Baltimore City are left out. Grading, storm-water and use-and-occupancy permits are not counted.
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 21128, Baltimore County", https://contractorrecords.com/baltimore-county/zip/21128, data through September 2026, from Baltimore County Permits, Approvals and Inspections building-permit records.Link to a table: By kind of work · By year · How permits finish.
Download the tables (CSV): Permits in 21128 by kind of work · Permits in 21128 by year · Permits in 21128: finished and days to final.