Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2011	Jun. 30, 2011	Mar. 15, 2012 Common Stock [Member]	Mar. 15, 2012 Convertible Preferred Stock [Member]
Entity Information [Line Items]
Entity Registrant Name	COLONIAL COMMERCIAL CORP
Entity Central Index Key	0000021828
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float		$ 904,618
Entity Common Stock, Shares Outstanding			9,154,953	293,057
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2011