Editorial and data policy

Every fact on this site should be traceable to a source and a date.

Every guide states the date it was last updated and lists its sources. Cost ranges name where they came from and when. Rebate and regulatory pages are reviewed quarterly and whenever a program changes. Contractor records are re-checked against the state license board at least annually and whenever a listing is claimed or updated.

Featured placement is disclosed on the page and does not influence guide content or verification status. We do not accept payment for reviews, rankings or verification.

Corrections: report a listing or email us. We correct errors within five business days and note material changes on the page.