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Organization and Ownership (Tables) | 12 Months Ended
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Dec. 31, 2020
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, 2020:
| Number of Buildings |  | Rentable Square Feet (unaudited) |  | Number of Tenants |  | Percentage Occupied (unaudited) (1) |  | Percentage Leased (unaudited)
Stabilized Office Properties (2) | 117 |  |  | 14,620,166 |  |  | 447 |  |  | 91.2 | % |  | 94.3 | %
_______________________ (1)Represents physical and economic occupancy. (2)Includes stabilized life science and retail space.
| Number of Projects |  | Number of Units |  | 2020 Average Occupancy (unaudited)
Stabilized Residential Properties | 2 |  | 808 |  |  | 72.0 | %
As of December 31, 2020, the following properties were excluded from our stabilized portfolio. We did not have any redevelopment properties or properties held for sale at December 31, 2020.
| Number of Properties/Projects |  | Estimated Rentable Square Feet (1) (unaudited)
In-process development projects - tenant improvement | 3 |  | 1,080,000 |
In-process development projects - under construction (2) | 3 |  | 856,000 |
____________________ (1)Estimated rentable square feet upon completion. (2)In addition to the estimated office and life science rentable square feet noted above, development projects under construction also include 193 residential units.

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- Definition Tabular disclosure of real estate properties and units in those properties that are included in the discussion of the nature of an entity's operations. + References No definition available. + Details
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