SL Green's $1.65B One Madison Refi Tests Office CMBS Appetite

On March 25, 2026, Wells Fargo led a six-bank syndicate in closing a $1.65 billion single-asset, single-borrower CMBS loan on One Madison Avenue, SL Green Realty's 1.4 million-square-foot mixed-use tower anchoring the north end of Madison Square Park. The fixed-rate, five-year note priced at 181 basis points over the U.S. Treasury index, producing a 5.81 percent coupon — a spread that, a year ago, would have cleared the room. That it didn't says something meaningful about where institutional appetite for office debt now sits.

The loan retires a $1.25 billion construction facility and leaves SL Green carrying a net outstanding balance of $1.17 billion, per the company's release. The math implies roughly $480 million in loan proceeds above the retiring debt — capital the REIT can redeploy toward its stated $7 billion financing target for 2026. With this deal and last week's $2 billion extension and refinancing of its corporate credit facility at improved terms, SL Green has now executed $4.5 billion in financing activity in fewer than 90 days this year, according to Harrison Sitomer, the firm's president and chief investment officer.

Goldman Sachs, J.P. Morgan, Bank of America, Deutsche Bank and Crédit Agricole joined Wells Fargo as co-originators. That roster matters. Getting five money-center and global banks to share SASB exposure on a single Manhattan office asset is not a given in a market where CMBS office delinquency rates climbed above 8 percent through 2025, according to Trepp data. The syndication structure distributes the risk, but it also signals that each institution ran its own credit process and arrived at the same answer: One Madison, at 100 percent occupancy, clears the bar.

The occupancy figure is not a rounding convention. One Madison's tenant roster reads like a cross-section of the industries actively expanding in Manhattan: IBM, Coinbase, Franklin Templeton, Palo Alto Networks, FanDuel Group, Sigma Computing, and Harvey AI all hold long-term leases, per SL Green. Chelsea Piers Fitness anchors the amenity stack. The building also houses La Tête d'Or by Daniel, chef Daniel Boulud's restaurant, and Le Jardin Sur Madison, a rooftop event space with direct views of Madison Square Park. In a market where tenants are consolidating into fewer, higher-quality addresses, One Madison was purpose-built to be the destination, not the fallback.

The renovation backstory matters to underwriters. SL Green began a $2.3 billion redevelopment of the property in 2020 — timing that required either extraordinary conviction or extraordinary stubbornness, given that office attendance hit its pandemic floor that same year. The firm grafted an 18-story, 500,000-square-foot glass tower onto the original 1893 limestone-and-granite structure, finishing three months ahead of schedule in September 2023. Joint venture partners Hines and the National Pension Service of Korea shared the construction risk. The result is a building that is, in a literal sense, both 133 years old and three years new.

The 181-basis-point spread over Treasuries deserves scrutiny on its own terms. For context, investment-grade corporate bonds from comparably rated issuers were trading in the 90-to-130 basis point range over equivalent Treasuries in early 2026, per Bloomberg data. Office CMBS at 181 over still prices a meaningful risk premium above corporate credit — the market has not forgotten 2023's regional bank stress or the wave of suburban office defaults that followed. But 181 over is also tighter than many market participants would have penciled for any office SASB deal eighteen months ago. The compression reflects asset selection, not sector rehabilitation.

That distinction is the critical read-through for the broader market. One Madison is not evidence that office lending is open again; it is evidence that lending is open for assets that are fully leased, recently renovated, located in supply-constrained Midtown South, and sponsored by the largest office REIT in New York City. Sponsors presenting lenders with 1990s vintage suburban product and 70 percent occupancy will not find Wells Fargo returning their calls on the basis of this deal. The bifurcation between trophy and commodity office has been discussed at length; this transaction puts a spread number on one side of that divide.

SL Green's broader financing ambition also deserves attention. The $7 billion target for 2026 implies an average of roughly $583 million per month across the calendar year. At $4.5 billion in the first quarter, the firm is running well ahead of pace — but that front-loading likely reflects deliberate execution of transactions that were in documentation when the year began, rather than evidence that the pipeline is infinitely deep. Investors watching SL Green's stock will want to see whether the second and third quarter deal flow sustains the pace or mean-reverts.

One Madison Avenue opened in 1893, briefly held the title of the tallest building in the world, and spent most of the 20th century as a MetLife back-office complex. SL Green acquired it in 2005, gutted and rebuilt it during a pandemic, and just refinanced it at 5.81 percent with six global banks competing for the paper. The same clock tower that once scraped the sky above a city of horse-drawn carriages is now collateral for a CMBS bond that institutional investors are evidently willing to hold. The question for the next leasing cycle is whether those tenants — several of them early-stage technology and crypto firms — are still writing rent checks when the five-year loan matures in 2031.