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September 2026 Building Permits

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

Ann Arbor, MI issued 1,430 building permits in September 2026, down 10% from the prior month. The most active zip code was 48104 with 581 permits. Mechanical (Residential) - General HVAC was the top permit type, making up 13% of all permits issued.

Permits issued
1,430
vs. prior month
-10%
1,583 last month
Most active zip
48104
581 permits
Top permit type
Mechanical (Residential) - General HVAC
13% of total

Permit activity by zip code

Top 10 zip codes by permit volume — September 2026

48104
581
48103
432
48105
285
48108
132

Permits by type

September 2026 · Ann Arbor, MI

Mechanical (Residential) - General HVAC
184 (13%)
Electrical (Residential) - General
176 (12%)
Electrical (Commercial) - General
148 (10%)
Mechanical (Commercial) - General HVAC
126 (9%)
Plumbing (Residential) - General
122 (9%)
Plumbing (Residential) - Water/Sewer/Storm
77 (5%)
Building (Residential) - Windows & Doors
60 (4%)
Electrical (Residential) - Reconnect
58 (4%)
Electrical (Commercial) - Reconnect
53 (4%)
Certificate of Occupancy
43 (3%)
Plumbing (Commercial) - General
37 (3%)
Building (Residential) - Alteration/Repair
29 (2%)
Building (Residential) - Radon
23 (2%)
Zoning Compliance - Fence (7 ft or less)
23 (2%)
Certificate of Occupancy - Final With No Site Compliance Plan
19 (1%)
Electrical (Residential) - Solar Panel - Roof Mounted [Expedited]
16 (1%)
Building (Residential) - Deck / Porches
15 (1%)
Mechanical (Commercial) - Fuel Gas Piping
15 (1%)
Building (Commercial) - Alteration/Repair
13 (1%)
Electrical (Residential) - Generator
12 (1%)
Grading/Soil Erosion - Residential
11 (1%)
MESA - Fire Alarm Permit
11 (1%)
Mechanical (Residential) - Generator
10 (1%)
Sign Permit - Wall
10 (1%)
Building (Residential) - Foundation Repair/Alteration
9 (1%)
Electrical (Commercial) - Sign
9 (1%)
MESA - Fire Suppression
8 (1%)
Electrical (Commercial) - Teledata/Low Voltage
7 (0%)
Building (Residential) - Addition
6 (0%)
Certificate of Occupancy - Re-Occupation
6 (0%)
Electrical (Residential) - Homeowner Permit
6 (0%)
Footing Drain Disconnection Verification
6 (0%)
Building (Commercial) - Solar - Ground/Roof
5 (0%)
Mechanical (Residential) - Boiler (1 or 2 unit structures only)
5 (0%)
Mechanical (Residential) - Fireplace
5 (0%)
Building (Commercial) - Roof
4 (0%)
Mechanical (Residential) - Fuel Gas Piping
4 (0%)
Building (Commercial) - Windows & Doors
3 (0%)
Building (Residential) - Basement Egress Window
3 (0%)
Building (Residential) - Detached Structures (over 200 sf or over 1 story)
3 (0%)
Building (Residential) - Roof (Flat Roof Only)
3 (0%)
Electrical (Commercial) - Solar - Ground/Roof
3 (0%)
Grading/Soil Erosion - Commercial
3 (0%)
Mechanical (Commercial) - Boiler 200,000 BTU and Greater OR 6 or more unit structure
3 (0%)
Mechanical (Residential) - Homeowner Permit
3 (0%)
Plumbing (Commercial) - Water/Sewer/Storm
3 (0%)
Civil Construction Permit
2 (0%)
Demolition - Commercial Interior
2 (0%)
Electrical (Commercial) - Generator
2 (0%)
Mechanical (Residential) - Hydronic/Piping
2 (0%)
MESA - Gas Detection Systems
2 (0%)
Zoning Compliance - Shed (200 sq ft or less)
2 (0%)
Building (Commercial) - Deck / Porch
1 (0%)
Building (Commercial) - Tenant Finish
1 (0%)
Building (Residential) - Fence > 7'
1 (0%)
Building (Residential) - New Construction
1 (0%)
Building (Residential) - Pool/Hot Tub/Spa
1 (0%)
Certificate of Occupancy - Final With Site Compliance Plan
1 (0%)
Electrical (Residential) - EV Charging Station
1 (0%)
Electrical (Residential) - Teledata/Low Voltage
1 (0%)
Mechanical (Commercial) - Generator
1 (0%)
Mechanical (Commercial) - Hydronic/Piping
1 (0%)
Mechanical (Residential) - New Air Conditioner Installation
1 (0%)
Mechanical (Residential) - Wood Burning Appliances and Venting
1 (0%)
Plumbing (Residential) - Homeowner Permit
1 (0%)
Portable Sign - In Front of Applicants Site
1 (0%)
Sign Permit - Face Change
1 (0%)
Sign Permit - Marquee
1 (0%)
Sign Permit - Projecting
1 (0%)
Zoning - Carport [Detached] (200 sq ft or less)
1 (0%)
Zoning Compliance - Change of Use
1 (0%)
Zoning Compliance - Mobile Food Service
1 (0%)

Other months — Ann Arbor

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