How many insulation & weatherization contractors are in REDWOOD CITY, 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 REDWOOD CITY, CA

3 listings

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

There are 3 insulation & weatherization contractors in REDWOOD CITY, 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
BAY AREA INSULATION SERVICES	1032509	C-2	2026-12-31	REDWOOD CITY	94064	Set up workspace
BAYSIDE EQUIPMENT COMPANY	467763	A, B, C-2, C-10, HAZ	2027-01-31	REDWOOD CITY	94063	Set up workspace
DELTA INSULATION SERVICES INC	1117247	C-2	2028-02-29	REDWOOD CITY	94064	Set up workspace

Quick answers

How many insulation & weatherization contractors are in REDWOOD CITY?: 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.