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COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands	Jun. 30, 2025 USD ($) community
Real estate properties
Number of communities | community	168
Costs Incurred to Date	$ 169,512
UDR's Remaining Commitment	133,088
Loss contingency accrual
Contingency liabilities	0
Real estate technology and sustainability investments
Real estate properties
Costs Incurred to Date	128,404
UDR's Remaining Commitment	$ 40,596
Wholly owned - under development
Real estate properties
Number of communities | community	1
Costs Incurred to Date	$ 41,108
UDR's Remaining Commitment	$ 92,492

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Amount of loss contingency liability.

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The number of real estate properties owned as of the balance sheet date.

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Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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