← All reportsWalnut Creek, CA · Monthly Report

September 2026 Building Permits

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

Walnut Creek, CA issued 408 building permits in September 2026, down 22% from the prior month. The most active zip code was 94595 with 128 permits. Building New Construction, Additions, Alterations or Sign was the top permit type, making up 30% of all permits issued.

Permits issued
408
vs. prior month
-22%
525 last month
Most active zip
94595
128 permits
Top permit type
Building New Construction, Additions, Alterations or Sign
30% of total

Permit activity by zip code

Top 10 zip codes by permit volume — September 2026

94595
128
94598
122
94596
101
94597
56

Permits by type

September 2026 · Walnut Creek, CA

Building New Construction, Additions, Alterations or Sign
121 (30%)
Parking Fees
51 (13%)
Mechanical, Electrical, or Plumbing Only
49 (12%)
Residential Plumbing: Water Heater Replacement ONLY (no relocation, no tankless)
45 (11%)
Residential Mechanical: HVAC, Furnace, Air Conditioner Replacement or Ductwork ONLY (no relocation)
34 (8%)
Reroof - Residential without Overlay
32 (8%)
Building Revision to Issued Permit
27 (7%)
Residential Electrical: Electrical Panel or Sub-Panel Replacement or Upgrade Panel ONLY (not exceeding 200amps & no relocation)
13 (3%)
EV Charger/Battery Storage System - Residential
8 (2%)
Estimate - Building
7 (2%)
Solar System - Residential
7 (2%)
Reroof - Multifamily Residential, Commercial or Residential with Overlay
3 (1%)
Solar System - Residential using Solar App+
3 (1%)
Administrative Documentation
2 (0%)
Estimate - Reroof
2 (0%)
After Hours
1 (0%)
Building Research
1 (0%)
Estimate - Mechanical, Electrical, or Plumbing Only
1 (0%)
Pool or Spa - New, Remodel or Demolition
1 (0%)

Other months — Walnut Creek

August 2026July 2026
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