Segment Reporting - Summary of Financial Results by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues
Rental revenue	$ 17,713	$ 2,066
Total revenues	17,713	2,066
Expenses
Rental property operating	5,274	561
Income from investment in real estate debt	1,738	545
Income (loss) from investments in real estate-related and other securities	(372)	8
Segment net operating income (loss)	13,805	2,058
Depreciation and amortization	(7,860)	(1,076)
General and administrative	(3,835)	(2,799)
Mandatorily redeemable instruments interest costs	(4,500)	(376)
Interest expense	(7,245)	(1,349)
Other income (expense), net	1,206	(211)
Net loss	(8,429)	(3,753)
Net loss attributable to non-controlling interests in consolidated joint ventures	(103)	(21)
Net loss attributable to JPMREIT stockholders, basic	(8,326)	(3,732)
Multifamily
Revenues
Rental revenue	14,709	1,700
Total revenues	14,709	1,700
Expenses
Rental property operating	5,008	461
Segment net operating income (loss)	9,701	1,239
Depreciation and amortization	(6,373)	(992)
Industrial
Revenues
Rental revenue	3,004	366
Total revenues	3,004	366
Expenses
Rental property operating	248	100
Segment net operating income (loss)	2,756	266
Depreciation and amortization	(1,448)	(75)
Single-family rental
Expenses
Rental property operating	16
Segment net operating income (loss)	(16)
Depreciation and amortization	(20)
Investments in real estate debt, real estate-related and other securities
Expenses
Rental property operating	2
Income from investment in real estate debt	1,738	545
Income (loss) from investments in real estate-related and other securities	(372)	8
Segment net operating income (loss)	$ 1,364	$ 553