How many insulation & weatherization contractors are in MONTCLAIR, 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 MONTCLAIR, CA

3 listings

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

There are 3 insulation & weatherization contractors in MONTCLAIR, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2027-05-31; 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
ARAGON CONSTRUCTION INC	799386	B, C-2, C-17, C-23, C-29, C-43, D34	2027-09-30	MONTCLAIR	91763	Set up workspace
INSULATED ZONE INC	1026801	B, C-2	2027-05-31	MONTCLAIR	91763	Set up workspace
QUALITY CONSERVATION SERVICES	1034739	B, C-2, C-10, C-20, C-36, C-39, D65	2028-01-31	MONTCLAIR	91763	Set up workspace

Quick answers

How many insulation & weatherization contractors are in MONTCLAIR?: 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.