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Permit Activity Report · September 21, 2026
Mercer Island, WA
537 permits filed in the last 90 days · data updated 2026-09-17
537
Permits · 90 Days
31
Permits · This Week
194
Active Contractors
0
Code Violations
Top Trades by Permit Volume
Electrical
567
HVAC
320
Plumbing
269
General Construction
247
Fire Protection
85
Most Active Contractors
1
POTELCO INC
HVAC · 6 permits/30d
34
permits
Verifying…
2
GREENWOOD HEATING &HOME SRVS
Electrical · 6 permits/30d
31
permits
Verifying…
3
GENE JOHNSN PLB HTG CL ELC LLC
Electrical
23
permits
🔒 Reveal phone
4
WASHINGTON ENERGY SVCS CO LLC
Electrical · 6 permits/30d
22
permits
Verifying…
5
INFRASOURCE SERVICES LLC
HVAC · 4 permits/30d
20
permits
🔒 Reveal phone
6
NORTH LAKE ELECTRIC LLC
Electrical · 2 permits/30d
19
permits
🔒 Reveal phone
7
SEATOWN ELECTRIC HTG &AIRLLC
Electrical · 4 permits/30d
18
permits
Verifying…
8
FAST WATER HEATER COMPANY
Plumbing · 4 permits/30d
14
permits
Verifying…
9
ADT LLC
Electrical · 1 permits/30d
9
permits
Verifying…
10
AS YOU WISH ELECTRIC
Electrical · 2 permits/30d
9
permits
🔒 Reveal phone