BALANCE SHEETS (USD $)	Dec. 31, 2012	Dec. 31, 2011
Building One Grand Central Place, located at 60 East 42nd Street and 301 Madison Avenue, New York, N.Y.
Total real estate, net	$ 67,615,604	$ 66,400,278
Cash and cash equivalents:
Cash in bank	243,776	6,285
Fidelity U.S. Treasury Income Portfolio	1,851,951	10,460,092
Total cash and cash equivalents	2,095,727	10,466,377
Due from Supervisor, a related party	87,202	87,202
Receivable from participants-NYS estimated tax	0	3,357
Deferred costs	3,310,685	1,684,758
Prepaid insurance	15,764	0
Leasing commissions, less accumulated amortization of $1,749,117 and $1,444,673 in 2012 and 2011, respectively	3,043,218	1,066,705
Mortgage refinancing costs, less accumulated amortization of $2,188,848 and $1,825,231 in 2012 and 2011, respectively	684,783	1,048,401
Total assets	76,852,983	80,757,078
Liabilities:
Mortgages payable	89,109,449	91,478,304
Accrued mortgage interest	417,546	428,479
Accrued supervisory fees, a related party	0	81,265
Payable to Lessee, a related party	21,951	720,066
Due to Supervisor, a related party	789,033	922,728
Accrued expenses	4,415	422,996
Total liabilities	90,342,394	94,053,838
Commitments and contingencies
Members' deficiency	(13,489,411)	(13,296,760)
Total liabilities and members' deficiency	76,852,983	80,757,078
Building [Member]
Building One Grand Central Place, located at 60 East 42nd Street and 301 Madison Avenue, New York, N.Y.
Real estate	16,960,000	16,960,000
Less: Accumulated depreciation	(16,960,000)	(16,960,000)
Total real estate, net
Building improvements and equipment [Member]
Building One Grand Central Place, located at 60 East 42nd Street and 301 Madison Avenue, New York, N.Y.
Real estate	68,039,708	66,940,647
Less: Accumulated depreciation	(13,918,390)	(12,187,313)
Total real estate, net	54,121,318	54,753,334
Tenant improvements [Member]
Building One Grand Central Place, located at 60 East 42nd Street and 301 Madison Avenue, New York, N.Y.
Real estate	8,779,779	5,793,417
Less: Accumulated depreciation	(2,525,493)	(1,386,473)
Total real estate, net	6,254,286	4,406,944
Land [Member]
Building One Grand Central Place, located at 60 East 42nd Street and 301 Madison Avenue, New York, N.Y.
Total real estate, net	$ 7,240,000	$ 7,240,000