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Organization and Ownership (Tables)
 12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Real Estate Properties
Our stabilized portfolio of operating properties was comprised of the following properties at December 31, 2023:

Number of
Buildings		Rentable
Square Feet (unaudited)		Number of
Tenants
Percentage 
Occupied
(unaudited)(1)
Percentage Leased
(unaudited)
Stabilized Office Properties (2)
121 17,044,128 410 85.0 %86.4 %
_______________________
(1)Represents economic occupancy.
(2)Includes stabilized life science and retail space.

Number of ProjectsNumber of Units
2023 Average Occupancy
(unaudited)
Stabilized Residential Properties31,001 92.8 %
We did not have any properties held for sale at December 31, 2023. As of December 31, 2023, the following properties were excluded from our stabilized portfolio:
Number of
Properties/Projects
Estimated Rentable
Square Feet (1)
(unaudited)
In-process development projects - under construction 1875,000
In-process redevelopment projects - under construction2100,000
____________________
(1)Estimated rentable square feet upon completion.