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Mortgages and Other Loans Payable
 12 Months Ended
Dec. 31, 2024
Mortgages and Other Loans Payable  
Mortgages and Other Loans Payable Mortgages and Other Loans Payable
The mortgages and other loans payable collateralized by the respective properties and assignment of leases or debt investments as of December 31, 2024 and 2023, respectively, were as follows (dollars in thousands):
PropertyCurrent Maturity Date
Final Maturity Date (1)
Interest
Rate (2)
December 31, 2024December 31, 2023
Fixed Rate Debt:
10 East 53rd StreetMay 2025May 20285.45%$205,000 $— 
100 Church StreetJune 2025June 20275.89%370,000 370,000 
7 Dey / 185 BroadwayNovember 2025November 20266.65%190,148 190,148 
Landmark SquareJanuary 2027January 20274.90%100,000 100,000 
485 Lexington AvenueFebruary 2027February 20274.25%450,000 450,000 
420 Lexington AvenueOctober 2040October 20408.24%272,326 277,238 
Total fixed rate debt$1,587,474 $1,387,386 
Floating Rate Debt:
CMBS Repurchase FacilityJune 2025June 2025S+1.75%$3,550 $— 
100 Park AvenueJune 2025December 2027S+2.25%360,000 — 
690 Madison Avenue— 60,000 
719 Seventh Avenue— 50,000 
Total floating rate debt$363,550 $110,000 
Total mortgages and other loans payable$1,951,024 $1,497,386 
Deferred financing costs, net of amortization(6,389)(6,067)
Total mortgages and other loans payable, net$1,944,635 $1,491,319 
(1)Reflects exercise of all available extension options. The ability to exercise extension options may be subject to certain conditions, including the operating performance of the property.
(2)Interest rate as of December 31, 2024, taking into account interest rate hedges in effect during the period. Floating rate debt is presented with the stated spread over Term SOFR ("S"), unless otherwise specified.
As of December 31, 2024 and 2023, the gross book value of the properties collateralizing the mortgages and other loans payable was approximately $2.2 billion and $1.9 billion, respectively.
CMBS Securities Repurchase Facility
In December 2024, the Company entered into a repurchase facility for CMBS securities (CMBS Repurchase Facility), which provides us with the ability to sell certain CMBS investments with a simultaneous agreement to repurchase the same at a certain date or on demand. We seek to mitigate risks associated with our repurchase facility by managing the credit quality of our assets, early repayments, interest rate volatility, liquidity, and market value. The margin call provisions under our repurchase facility permit valuation adjustments based on capital markets activity and are not limited to collateral-specific credit marks. To monitor credit risk associated with our CMBS investments, our asset management team regularly reviews our investment portfolio and is in contact with our borrowers in order to monitor the collateral and enforce our rights as necessary. The risk associated with potential margin calls is further mitigated by our ability to collateralize the facility with additional assets from our portfolio of investments, our ability to satisfy margin calls with cash or cash equivalents and our access to additional liquidity. As of December 31, 2024, there have been no margin calls on the CMBS Repurchase Facility. At December 31, 2024, the facility had an outstanding balance of $3.6 million.
Corporate Indebtedness
2021 Credit Facility
In December 2021, we entered into an amended and restated credit facility, referred to as the 2021 credit facility, that was previously amended by the Company in November 2017, and was originally entered into by the Company in November 2012. As of December 31, 2024, the 2021 credit facility consisted of a $1.25 billion revolving credit facility, a $1.05 billion term loan (or "Term Loan A"), and a $200.0 million term loan (or "Term Loan B") with maturity dates of May 15, 2026, May 15, 2027, and November 21, 2024, respectively. In November 2024, Term Loan B was paid down to $100 million and the maturity date was extended to November 19, 2025, with two additional six-month as-of-right extension options. The revolving credit facility has two six-month as-of-right extension options to May 15, 2027. We also have an option, subject to customary conditions, to increase the capacity of the credit facility to $4.5 billion at any time prior to the maturity dates for the revolving credit facility and term loans without the consent of existing lenders, by obtaining additional commitments from our existing lenders and other financial institutions.
As of December 31, 2024, the 2021 credit facility bore interest at a spread over adjusted Term SOFR plus 10 basis points with an interest period of one or three months, as we may elect, ranging from (i) 72.5 basis points to 140 basis points for loans under the revolving credit facility, (ii) 80 basis points to 160 basis points for loans under Term Loan A, and (iii) 85 basis points to 165 basis points for loans under Term Loan B, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of the Company. In instances where there are either only two ratings available or where there are more than two and the difference between them is one rating category, the applicable rating shall be the highest rating. In instances where there are more than two ratings and the difference between the highest and the lowest is two or more rating categories, then the applicable rating used is the average of the highest two, rounded down if the average is not a recognized category.
As of December 31, 2024, the applicable spread over adjusted Term SOFR plus 10 basis points for the 2021 credit facility was 140 basis points for the revolving credit facility, 160 basis points for Term Loan A, and 180 basis points for Term Loan B. We are required to pay quarterly in arrears a 12.5 to 30 basis point facility fee on the total commitments under the revolving credit facility based on the credit rating assigned to the senior unsecured long-term indebtedness of the Company. As of December 31, 2024, the facility fee was 30 basis points.
As of December 31, 2024, we had $7.5 million of outstanding letters of credit, $320.0 million drawn under the revolving credit facility and $1.15 billion of outstanding term loans, with total undrawn capacity of $922.5 million under the 2021 credit facility. As of December 31, 2024 and December 31, 2023, the revolving credit facility had a carrying value of $316.2 million and $554.8 million, respectively, net of deferred financing costs. As of December 31, 2024 and December 31, 2023, the term loans had a carrying value of $1.1 billion and $1.2 billion, respectively, net of deferred financing costs.
The Company and the Operating Partnership are borrowers jointly and severally obligated under the 2021 credit facility.
The 2021 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).
Senior Unsecured Notes
The following table sets forth our senior unsecured notes and other related disclosures as of December 31, 2024 and 2023, respectively, by scheduled maturity date (dollars in thousands):
December 31, 2024December 31, 2023
IssuanceUnpaid Principal BalanceAccreted
Balance		Accreted
Balance
Interest Rate (1)
Initial Term
(in Years)		Maturity Date
December 17, 2015 (2)
$100,000 $100,000 $100,000 4.27 %10December 2025
$100,000 $100,000 $100,000 
Deferred financing costs, net— (103)(205)
$100,000 $99,897 $99,795 
(1)Interest rate as of December 31, 2024.
(2)Issued by the Company and the Operating Partnership as co-obligors in a private placement.
Restrictive Covenants
The terms of the 2021 credit facility and our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that, we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable the Company to continue to qualify as a REIT for Federal income tax purposes. As of December 31, 2024 and 2023, we were in compliance with all such covenants.
Junior Subordinated Deferrable Interest Debentures
In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly owned subsidiary of the Operating Partnership. The securities mature in 2035 and bear interest at a floating rate of 26 basis points over the three-month Term SOFR. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our consolidated balance sheets and the related payments are classified as interest expense.
Principal Maturities
Combined aggregate principal maturities of mortgages and other loans payable, the 2021 credit facility, trust preferred securities, senior unsecured notes and our share of joint venture debt as of December 31, 2024, including as-of-right extension options but excluding other extension options, were as follows (in thousands):
Scheduled
Amortization		PrincipalRevolving
Credit
Facility		Unsecured Term LoansTrust
Preferred
Securities		Senior
Unsecured
Notes		TotalCompany's Share of Joint
Venture
Debt
2025— 373,551 — — — 100,000 $473,551 1,198,400 
2026— 190,148 — 100,000 — — 290,148 936,639 
2027— 910,000 320,000 1,050,000 — — 2,280,000 1,710,229 
2028— 205,000 — — — — 205,000 382,294 
2029— — — — — — — — 
Thereafter— 272,325 — — 100,000 — 372,325 1,800,300 
Total$— $1,951,024 $320,000 $1,150,000 $100,000 $100,000 $3,621,024 $6,027,862 
Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):
Year Ended December 31,
202420232022
Interest expense before capitalized interest$196,334 $228,840 $166,493 
Interest on financing leases 4,502 4,446 4,555 
Capitalized interest(50,148)(95,980)(82,444)
Amortization of discount on assumed debt494 2,842 1,855 
Interest income(3,962)(3,034)(986)
Interest expense, net$147,220 $137,114 $89,473