Earnings Per Share - Schedule of Computations of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	[1]	Jun. 30, 2023	Jun. 30, 2022	[1]
Numerator:
Net loss attributable to JPMREIT stockholders, basic	$ (2,582)	$ (2)		$ (9,000)	$ (2)
Net loss attributable to JPMREIT stockholders, diluted	$ (2,582)	$ (2)		$ (9,000)	$ (2)
Denominator:
Weighted-average shares of common stock outstanding, basic	7,093	91		5,525	55
Weighted-average shares of common stock outstanding, diluted	7,093	91		5,525	55
Net loss per share of common stock, basic	$ (0.36)	$ (0.02)		$ (1.63)	$ (0.04)
Net loss per share of common stock, diluted	$ (0.36)	$ (0.02)		$ (1.63)	$ (0.04)

[1] J.P. Morgan Real Estate Income Trust, Inc. was formed on November 5, 2021 and commenced operations on September 2, 2022, accordingly, there were minimal operations during the three and six months ended June 30, 2022.