Segment Reporting (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Construction [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue	$ 6,793,690	$ 4,514,122
Other income gain/loss	(7,041,313)	161,212
Other income (expense)	5,163	(3,012)
Income before income taxes	(7,036,150)	158,200
Net income attributable to non-controlling interest
Net loss attributable to common stockholders of SG Blocks, Inc.	(7,036,150)	158,200
Total Assets	12,274,536	10,545,092
Depreciation, Depletion and Amortization	351,795	225,770
Capital expenditures	886,504	189,144
Medical [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue	31,548,012	4,241,501
Other income gain/loss	8,405,332	996,956
Other income (expense)	(9,878)
Income before income taxes	8,395,455	996,956
Net income attributable to non-controlling interest	4,924,303	184,567
Net loss attributable to common stockholders of SG Blocks, Inc.	3,471,152	812,389
Total Assets	5,884,098	4,368,848
Depreciation, Depletion and Amortization	240,266	4,256
Capital expenditures	362,122	1,350,252
Development [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue
Other income gain/loss	(203,078)
Other income (expense)	(55)
Income before income taxes	(203,133)
Net income attributable to non-controlling interest
Net loss attributable to common stockholders of SG Blocks, Inc.	(203,133)
Total Assets	8,053,885	0
Depreciation, Depletion and Amortization	0	0
Capital expenditures	3,576,130	0
Corporate and support [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue
Other income gain/loss	(7,143,792)	(5,741,001)
Other income (expense)	79,248	77,682
Income before income taxes	(7,064,544)	(5,663,319)
Net income attributable to non-controlling interest
Net loss attributable to common stockholders of SG Blocks, Inc.	(7,064,544)	(5,663,318)
Total Assets	8,711,499	11,968,157
Depreciation, Depletion and Amortization	13,345	9,956
Capital expenditures	0	28,720
Conslidated [Member]
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Revenue	38,341,702	8,755,623
Other income gain/loss	(5,982,851)	(4,582,833)
Other income (expense)	74,478	74,670
Income before income taxes	(5,908,372)	(4,508,163)
Net income attributable to non-controlling interest	4,924,303	184,567
Net loss attributable to common stockholders of SG Blocks, Inc.	(10,832,675)	(4,692,729)
Total Assets	34,924,018	26,882,097
Depreciation, Depletion and Amortization	605,406	239,982
Capital expenditures	$ 4,824,756	$ 1,568,115