How many insulation & weatherization contractors are in WALNUT CREEK, CA?

7 with a current California license, as of 2026-08-31.

How do I check a California contractor license is current?

Every listing shows its state license number and expiry date. Verify any of them directly against the California CSLB licensee database.

Insulation & Weatherization contractors in WALNUT CREEK, CA

7 listings

Source: California CSLB license records. Last verified 2026-08-31.

There are 7 insulation & weatherization contractors in WALNUT CREEK, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2026-09-30; every listing shows its own number and expiry date. All are drawn from the California CSLB register; expired and inactive licenses are excluded.

Business	License	Type	Expires	City	Zip
ATTIC SOLUTIONS INC	1036391	B-2, C-2	2026-09-30	WALNUT CREEK	94597	Set up workspace
DVOSKIN ALON	1101431	C-2, D28	2027-02-28	WALNUT CREEK	94596	Set up workspace
ECO PERFORMANCE BUILDERS INC	944856	B, C-2, C-20	2028-03-31	WALNUT CREEK	94597	Set up workspace
JOE WALSH CUSTOM DRYWALL	813349	B, C-2, C-9	2026-10-31	WALNUT CREEK	94596	Set up workspace
MILLER ATTICS	1150503	C-2, D28	2028-02-29	WALNUT CREEK	94596	Set up workspace
NOR - CAL ACOUSTICS	998459	C-2	2026-11-30	WALNUT CREEK	94598	Set up workspace
PRECISE BUILDERS & RESTORATION	1111816	B, C-2, C-39	2027-10-31	WALNUT CREEK	94596	Set up workspace

Quick answers

How many insulation & weatherization contractors are in WALNUT CREEK?: 7 with a current California license, as of 2026-08-31.
How do I check a license is current?: Every listing shows its state license number and expiry. Verify any of them directly against the California CSLB licensee database.