How many insulation & weatherization contractors are in SAN MATEO, CA?

3 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 SAN MATEO, CA

3 listings

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

There are 3 insulation & weatherization contractors in SAN MATEO, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2026-12-31; 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
O'RIORDAN CONSTRUCTION INC	670221	ASB, B, C-2, D65, HAZ	2027-07-31	SAN MATEO	94402	Set up workspace
RYAN BUILDERS INC	932142	B, C-2, C-9, C-33, C-35	2028-01-31	SAN MATEO	94402	Set up workspace
THE BAY AREA INSULATION	1130303	C-2	2026-12-31	SAN MATEO	94401	Set up workspace

Quick answers

How many insulation & weatherization contractors are in SAN MATEO?: 3 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.