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Investments in Unconsolidated Joint Ventures
 9 Months Ended
Sep. 30, 2022
Investments In Unconsolidated Joint Ventures [Abstract]  
Investments In Unconsolidated Joint Ventures
5. Investments in Unconsolidated Joint Ventures
The investments in unconsolidated joint ventures consist of the following at September 30, 2022 and December 31, 2021:
 Carrying Value of Investment (1)
EntityPropertiesNominal % OwnershipSeptember 30, 2022December 31, 2021
(in thousands)
Square 407 Limited PartnershipMarket Square North50.00 %$(5,759)$(1,205)
BP/CRF Metropolitan Square LLCMetropolitan Square20.00 %(39,318)(15,356)
901 New York, LLC901 New York Avenue25.00 %(2) (12,506)(12,597)
WP Project Developer LLC
Wisconsin Place Land and Infrastructure
33.33 %(3) 32,638 33,732 
500 North Capitol Venture LLC500 North Capitol Street, NW30.00 %(9,432)(7,913)
501 K Street LLC
1001 6th Street
50.00 %(4) 42,922 42,576 
Podium Developer LLCThe Hub on Causeway - Podium50.00 %48,571 48,980 
Residential Tower Developer LLCHub50House50.00 %45,662 47,774 
Hotel Tower Developer LLC
The Hub on Causeway - Hotel Air Rights
50.00 %12,165 11,505 
Office Tower Developer LLC100 Causeway Street50.00 %59,379 57,687 
1265 Main Office JV LLC1265 Main Street50.00 %3,358 3,541 
BNY Tower Holdings LLCDock 72 50.00 %26,947 27,343 
BNYTA Amenity Operator LLC Dock 72 50.00 %825 1,069 
CA-Colorado Center, LLCColorado Center50.00 %234,271 231,479 
7750 Wisconsin Avenue LLC 7750 Wisconsin Avenue 50.00 %52,656 61,626 
BP-M 3HB Venture LLC3 Hudson Boulevard25.00 %116,678 116,306 
SMBP Venture LPSanta Monica Business Park55.00 %166,302 156,639 
Platform 16 Holdings LPPlatform 1655.00 %(5)143,558 109,086 
Gateway Portfolio Holdings LLCGateway Commons50.00 %(6)314,137 327,148 
Rosecrans-Sepulveda Partners 4, LLCBeach Cities Media Campus50.00 %27,017 27,106 
Safeco Plaza REIT LLCSafeco Plaza33.67 %(7)70,889 72,545 
360 PAS Holdco LLC360 Park Avenue South42.21 %(8)112,772 106,855 
PR II/BXP Reston Gateway LLCReston Next Residential20.00 %(9)11,267 N/A
751 Gateway Holdings LLC751 Gateway 49.00 %(6)71,820 N/A
$1,526,819 $1,445,926 
 _______________
(1)Investments with deficit balances aggregating approximately $67.0 million and $37.1 million at September 30, 2022 and December 31, 2021, respectively, are included within Other Liabilities in the Company’s Consolidated Balance Sheets.
(2)The Company’s economic ownership has increased based on the achievement of certain return thresholds. At September 30, 2022 and December 31, 2021, the Company’s economic ownership was approximately 50%.
(3)The Company’s wholly-owned subsidiary that owns Wisconsin Place Office also owns a 33.33% interest in the joint venture entity that owns the land, parking garage and infrastructure of the project.
(4)Under the joint venture agreement for this land parcel, the partner will be entitled to up to two additional payments from the venture based on increases in total entitled square footage of the project in excess of 520,000 square feet and achieving certain project returns at stabilization.
(5)This entity is a VIE (See Note 2).
(6)On June 16, 2022, in accordance with the Gateway Commons joint venture agreement, 751 Gateway was segregated into a new single-purpose joint venture.
(7)The Company’s ownership includes (1) a 33.0% direct interest in the joint venture, and (2) an additional 1% interest in each of the two entities through which each partner owns its interest in the joint venture.
(8)The Company’s ownership includes (1) a 35.79% direct interest in the joint venture, (2) an additional 5.837% indirect ownership in the joint venture, and (3) an additional 1% interest in each of the two entities through which each partner owns its interest in the joint venture. The Company’s partners will fund required capital until their aggregate investment is
approximately 58% of all capital contributions; thereafter, the partners will fund required capital according to their percentage interests.
(9)The Company’s partner will fund required capital until its aggregate investment is approximately 80% of all capital contributions; thereafter, the partners will fund required capital according to their percentage interests.
Certain of the Company’s unconsolidated joint venture agreements include provisions whereby, at certain specified times, each partner has the right to initiate a purchase or sale of its interest in the joint ventures. Under certain of the Company’s joint venture agreements, if certain return thresholds are achieved, the partners or the Company will be entitled to an additional promoted interest or payments.
The combined summarized balance sheets of the Company’s unconsolidated joint ventures are as follows: 
September 30, 2022December 31, 2021
 (in thousands)
ASSETS
Real estate and development in process, net (1)$5,858,271 $5,579,218 
Other assets655,549 586,470 
Total assets$6,513,820 $6,165,688 
LIABILITIES AND MEMBERS’/PARTNERS’ EQUITY
Mortgage and notes payable, net$3,425,972 $3,214,961 
Other liabilities (2)681,228 652,135 
Members’/Partners’ equity2,406,620 2,298,592 
Total liabilities and members’/partners’ equity$6,513,820 $6,165,688 
Company’s share of equity$1,180,507 $1,104,175 
Basis differentials (3)346,312 341,751 
Carrying value of the Company’s investments in unconsolidated joint ventures (4)$1,526,819 $1,445,926 
_______________
(1)At September 30, 2022 and December 31, 2021, this amount included right of use assets - finance leases totaling approximately $248.9 million. At September 30, 2022 and December 31, 2021, this amount included right of use assets - operating leases totaling approximately $21.4 million and $22.3 million, respectively.
(2)At September 30, 2022 and December 31, 2021, this amount included lease liabilities - finance leases totaling approximately $383.0 million and $385.5 million, respectively. At September 30, 2022 and December 31, 2021, this amount included lease liabilities - operating leases totaling approximately $30.5 million and $30.4 million, respectively.
(3)This amount represents the aggregate difference between the Company’s historical cost basis and the basis reflected at the joint venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials result from impairments of investments, acquisitions through joint ventures with no change in control and upon the transfer of assets that were previously owned by the Company into a joint venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the joint venture level. The majority of the Company’s basis differences are as follows:

September 30, 2022December 31, 2021
Property(in thousands)
Colorado Center$302,539 $304,776 
Gateway Commons51,188 51,009 
Dock 72(48,753)(50,051)
These basis differentials (excluding land) will be amortized over the remaining lives of the related assets and liabilities.
(4)Investments with deficit balances aggregating approximately $67.0 million and $37.1 million at September 30, 2022 and December 31, 2021, respectively, are reflected within Other Liabilities in the Company’s Consolidated Balance Sheets.
The combined summarized statements of operations of the Company’s unconsolidated joint ventures are as follows: 
 Three months ended September 30,Nine months ended September 30,
 2022202120222021
 (in thousands)
Total revenue (1)$127,996 $90,009 $373,358 $268,501 
Expenses
Operating52,886 40,378 143,880 114,299 
Transaction costs(65)— 746 7 
Depreciation and amortization44,132 36,036 132,089 103,766 
Total expenses96,953 76,414 276,715 218,072 
Other income (expense)
Loss from early extinguishment of debt— — (1,327)— 
Interest expense(40,678)(27,519)(103,270)(78,711)
Net loss$(9,635)$(13,924)$(7,954)$(28,282)
Company’s share of net income (loss)$(2,251)$(4,491)$2,225 $(10,268)
Gain on sale of investment (2)— — — 10,257 
Basis differential (3)(1,273)(1,106)(3,614)(1,734)
Loss from unconsolidated joint ventures$(3,524)$(5,597)$(1,389)$(1,745)
_______________ 
(1)Includes straight-line rent adjustments of approximately $9.6 million and $5.5 million for the three months ended September 30, 2022 and 2021, respectively, and approximately $54.9 million and $11.6 million for the nine months ended September 30, 2022 and 2021, respectively. For the nine months ended September 30, 2022, reinstatement of accrued rent balances totaled approximately $2.5 million.
(2)During the nine months ended September 30, 2021, the Company completed the sale of its 50% ownership interest in Annapolis Junction NFM LLC. The Company recognized a gain on sale of investment of approximately $10.3 million.
(3)Includes straight-line rent adjustments of approximately $0.1 million for each of the three months ended September 30, 2022 and 2021, and approximately $0.3 million and $0.7 million for the nine months ended September 30, 2022 and 2021, respectively. Also includes net above-/below-market rent adjustments of approximately $0.1 million for each of the three months ended September 30, 2022 and 2021, and approximately $0.3 million and $0.2 million for the nine months ended September 30, 2022 and 2021, respectively.
On January 18, 2022, a joint venture in which the Company has a 50% interest commenced the redevelopment of 651 Gateway located in South San Francisco, California. 651 Gateway is a premier workplace that is being converted to approximately 327,000 net rentable square feet of life sciences space.
On February 2, 2022, a joint venture in which the Company has a 55% interest commenced the development of the first phase of Platform 16, a premier workplace project located in San Jose, California, that is expected to contain approximately 1.1 million net rentable square feet upon completion. The first phase of the development projects includes the construction of an approximately 390,000 net rentable square foot premier workplace building and a below-grade parking garage.
On March 28, 2022, a joint venture in which the Company has a 20% interest refinanced with a new lender the debt secured by its Metropolitan Square property located in Washington, DC. At the time of the refinancing, the loan had an outstanding balance of approximately $294.1 million, bore interest at a variable rate equal to (1) the greater of (x) LIBOR or (y) 0.65%, plus (2) 4.75% per annum and was scheduled to mature on July 7, 2022, with two, one-year extension options, subject to certain conditions. There was no prepayment penalty associated with the prepayment of the previous mortgage loan. The joint venture recognized a loss from early extinguishment of debt totaling approximately $1.3 million due to the write-off of unamortized deferred financing costs. In conjunction with the refinancing, the joint venture settled its interest rate cap agreement, entered into in 2020, to limit its exposure to increases in the LIBOR rate. The new mortgage and mezzanine loans have an aggregate principal balance of $420.0 million, bear interest at a weighted average variable rate equal to the Secured Overnight Financing Rate (“SOFR“) plus 2.75% per annum and mature on April 9, 2024, with three, one-year extension options, subject to certain conditions. The joint venture distributed excess loan proceeds from the new mortgage and mezzanine loans
totaling approximately $100.5 million, of which the Company’s share totaled approximately $20.1 million. On September 1, 2022, the joint venture entered into an interest rate cap agreement that capped SOFR at 4.50% per annum on a notional amount of $420.0 million through April 15, 2024. Metropolitan Square is a premier workplace with approximately 657,000 net rentable square feet located in Washington, DC.
On April 18, 2022, a joint venture in which the Company has a 50% ownership interest extended the maturity date of the construction loan collateralized by its Hub50House property to June 19, 2022. At the time of the extension, the outstanding balance of the loan totaled approximately $176.5 million, bore interest at a variable rate equal to LIBOR plus 2.00% per annum and was scheduled to mature on April 19, 2022. On June 17, 2022, the joint venture repaid the existing construction loan and obtained a new mortgage loan. The new mortgage loan has a principal balance of $185.0 million, bears interest at a variable rate equal to SOFR plus 1.35% per annum and matures on June 17, 2032. At closing, the joint venture entered into interest rate swap contracts with notional amounts aggregating $185.0 million through April 10, 2032, resulting in a fixed rate of approximately 4.432% per annum through the expiration of the interest rate swap contracts. In conjunction with the new mortgage loan, the joint venture paid off the existing construction loan. At the time of the payoff of the construction loan, the outstanding balance of the loan totaled approximately $176.7 million. The joint venture distributed excess loan proceeds from the new mortgage loan totaling approximately $6.8 million, of which the Company’s share totaled approximately $3.4 million. Hub50House is a residential property that consists of approximately 320,000 net rentable square feet and 440 residential units located in Boston, Massachusetts.
On May 13, 2022, the Company entered into a joint venture with a third party to own, operate and develop Reston Next Residential located in Reston, Virginia. Reston Next Residential is expected to consist of 508 residential rental units upon completion. The Company contributed approximately $11.3 million of improvements at closing and will contribute cash totaling approximately $3.5 million in the future for its 20% ownership interest in the joint venture. The partner contributed approximately $0.5 million of cash at closing and will contribute cash totaling approximately $58.7 million in the future for its 80% ownership interest in the joint venture. As a result of the partner’s deferred contribution, as of the acquisition date, the Company owned an approximately 96% interest in the joint venture. On May 13, 2022, the joint venture commenced development and entered into a construction loan collateralized by the property. The construction loan has a principal amount of up to $140.0 million, bears interest at a variable rate equal to SOFR plus 2.00% per annum and matures on May 13, 2026, with two, one-year extension options, subject to certain conditions.
On June 16, 2022, the Company entered into a joint venture with a third party to own, operate and develop 751 Gateway, a laboratory building located in South San Francisco, California, that is expected to be approximately 231,000 net rentable square feet upon completion. 751 Gateway was previously part of the Company’s Gateway Commons joint venture. The Company contributed assets with an agreed upon value aggregating approximately $53.9 million and cash totaling approximately $2.6 million for its 49% ownership interest in the joint venture. The partner contributed assets with an agreed upon value aggregating approximately $53.9 million and cash totaling approximately $4.9 million for its 51% ownership interest in the joint venture.
On August 8, 2022, a joint venture in which the Company has a 50% interest modified the construction loan collateralized by its Dock 72 property located in Brooklyn, New York. At the time of the modification, the loan had an outstanding balance totaling approximately $198.4 million, a total commitment amount of $250.0 million, bore interest at a variable rate equal to LIBOR plus 3.35% per annum, and was scheduled to mature on December 18, 2023. The modified construction loan bears interest at a variable rate equal to (1) the greater of (x) SOFR or (y) 0.25% plus (2) 3.10% per annum, has a total commitment amount of approximately $198.4 million, and continues to mature on December 18, 2023. Dock 72 is a premier workplace with approximately 669,000 net rentable square feet.
On September 9, 2022, a joint venture in which the Company has an approximate 33.67% interest modified the mortgage loan collateralized by its Safeco Plaza property located in Seattle, Washington. At the time of the modification, the loan’s outstanding balance totaled $250.0 million, bore interest at a variable rate equal to the greater of (x) 2.35% or (y) LIBOR plus 2.20% per annum, and was scheduled to mature on September 1, 2026. The modified mortgage loan bears interest at a variable rate equal to the greater of (x) 2.35% or (y) SOFR plus 2.32% per annum and continues to mature on September 1, 2026. In conjunction with the loan modification, the joint venture entered into an interest rate cap agreement that capped SOFR at 2.50% per annum on a notional amount of $250.0 million through September 1, 2023. Safeco Plaza is a premier workplace with approximately 765,000 net rentable square feet.