How many insulation & weatherization contractors are in LANCASTER, CA?

6 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 LANCASTER, CA

6 listings

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

There are 6 insulation & weatherization contractors in LANCASTER, California with a current state license as of 2026-08-31. The earliest license expiry among them is 2026-10-31; 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
ADVANCED CONSERVATION SYSTEMS INC	508902	B, C-2, C-46	2027-04-30	LANCASTER	93535	Set up workspace
DAY & ZIMMERMANN NPS INC	462629	C-2	2027-11-30	LANCASTER	17601	Set up workspace
DIAMOND STAR INSULATION	1100974	C-2	2027-01-31	LANCASTER	93535	Set up workspace
EVALUATION & REMEDIATION SERVICES	807968	A, B, C-2, C-4, C-21, C-34, C-36, C-42, C-55	2028-05-31	LANCASTER	93535	Set up workspace
IREX ARGUS CONTRACTING LP	934189	ASB, B, C-2, C-21, C-22, C-33, D39, HAZ	2027-06-30	LANCASTER	17608	Set up workspace
PACE SETTER PLUMBING CORPORATION	544777	A, ASB, B, C-2, C-4, C-21, C-34, C-36, C-42, C-46, C-55, HAZ	2026-10-31	LANCASTER	93535	Set up workspace

Quick answers

How many insulation & weatherization contractors are in LANCASTER?: 6 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.