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September 2026 Building Permits

Official permit data from Montgomery County — updated Mon, Wed & Fri from the county permitting office.

Montgomery County, MD issued 768 building permits in September 2026, down 2% from the prior month. The most active zip code was 20817 with 51 permits. Building Residential Permit — Alter was the top permit type, making up 43% of all permits issued.

Permits issued
768
vs. prior month
-2%
785 last month
Most active zip
20817
51 permits
Top permit type
Building Residential Permit — Alter
43% of total

Permit activity by zip code

Top 10 zip codes by permit volume — September 2026

20817
51
20854
45
20906
41
20904
39
20814
37
20815
36
20902
36
20895
32
20910
30
20878
28

Permits by type

September 2026 · Montgomery County, MD

Building Residential Permit — Alter
334 (43%)
Building Residential Permit — Construct
193 (25%)
Building Residential Permit — Add
86 (11%)
Commercial Building — Alter
76 (10%)
Building Residential Permit — Restore And / Or Repair
22 (3%)
Commercial Building — Construct
17 (2%)
Commercial Building — Install
15 (2%)
Commercial Building — Restore And / Or Repair
12 (2%)
Commercial Building — Add
7 (1%)
Commercial Building — Commercial Change Of Use
2 (0%)
Commercial Building — Construct Sheeting/Shoring
2 (0%)
Building Residential Permit — Final Only Ap
1 (0%)
Commercial Building — Build Foundation
1 (0%)

Other months — Montgomery County

October 2026August 2026July 2026
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