Maryland building permit authorities
2025 Census Building Permits Survey directory.
85 permit-issuing authorities
The Census Building Permits Survey lists 85 authorities in Maryland. They reported 13,358 residential units permitted in 2025; 78 of them (92%) reported activity.
No single authority dominates: the largest, Prince Georges County Unincorporated Area, accounts for 15% of the state total.
Largest authorities by 2025 residential units
| Authority | Units permitted |
|---|---|
| Prince Georges County Unincorporated Area | 1,978 |
| Anne Arundel County Unincorporated Area | 1,590 |
| Baltimore County | 1,531 |
| Montgomery County Unincorporated Area | 1,304 |
| Frederick | 773 |
| Charles County Unincorporated Area | 770 |
| Howard County | 728 |
| Baltimore | 543 |
| Frederick County Unincorporated Area | 395 |
| Harford County Unincorporated Area | 349 |
| Washington County Unincorporated Area | 315 |
| Queen Annes County Unincorporated Area | 278 |
Source: U.S. Census Bureau Building Permits Survey, 2025. Inclusion confirms that an authority issues permits — not that it publishes an open feed, and not that any address has an active project. What we measure before covering a market →
Key takeaways
This directory records 85 authorities that issued permits in Maryland and 13,358 residential units reported for 2025. Our analysis of the Census survey shows reporting scale, not whether an authority has an open permit database or whether a particular project is active. Those questions need the authority’s own current record.
- Use the authority name to locate the primary record.
- Check local data availability separately.
- Verify a project before outreach or a bid decision.
Common question
Does inclusion mean Projects Ahead has a usable project signal there?
No. Inclusion means the Census survey identifies an authority that issues permits. A usable project signal requires separate testing of source access, fields and the ability to reconstruct a project timeline.