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Northwind Provides $231 Million Loan to Convert Manhattan Office Tower Into Up to 450 Apartments

Northwind originated a $231 million construction loan to convert 675 Third Avenue in Manhattan into up to 450 rental apartments, with 25% planned as affordable housing.

Manhattan street with tall office buildings and cars; illustrative image, not identified as 675 Third Avenue
Illustrative photograph of a Manhattan office streetscape; not 675 Third Avenue. Photo: ubeyonroad / Unsplash.

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Summary

Northwind Group announced November 2, 2026, that it originated a $231 million first-mortgage construction loan for the conversion of 675 Third Avenue in Manhattan into up to 450 rental apartments. The developer expects 25% of the homes to qualify as affordable under New York's 467-m program. The financing replaces existing debt; the developers bought the building in April 2025. Exact loan-closing time was not disclosed.

A 32-story Manhattan office tower is moving closer to becoming housing after Northwind Group arranged a $231 million construction loan for a conversion that could produce as many as 450 rental apartments.

The lender announced the financing Monday, November 2, at 3:30 p.m. Eastern. The first-mortgage loan covers 675 Third Avenue, a 337,000-square-foot office building in Midtown East. According to Northwind’s announcement, 25% of the planned apartments would be affordable under New York’s 467-m program.

That housing component is a development plan, not completed inventory. The release did not specify a construction completion date, final apartment count or affordability income bands. Those details will matter in judging how much relief the conversion ultimately provides in a high-cost neighborhood.

From acquisition financing to construction debt

A partnership between Nathan Berman’s Metro Loft Management and David Werner Real Estate Investments acquired the building in April 2025 with a $90 million acquisition loan from Northwind. The newly originated $231 million financing retires the prior debt and is intended to fund the office-to-residential redevelopment.

The financing announcement therefore represents a new construction-stage transaction, not a second acquisition of the property. Northwind said preliminary work had already begun on site and the project had advanced through planning and predevelopment.

Collaborative Construction Management will manage construction, while Gensler Architecture, Design & Planning is the architect of record. The lender did not disclose the new loan’s coupon, maturity or debt-service coverage requirements.

Why the capital structure matters

Converting offices into apartments is more complicated than simply replacing desks with kitchens. Developers must address residential plumbing, natural light, building systems, egress and apartment layouts while carrying financing and construction costs. A committed construction loan is a consequential step, but it does not eliminate execution or leasing risk.

The transaction is the ninth New York City office-to-residential conversion financed by Northwind, according to the firm. It was originated through Northwind Debt Fund III, which recently closed with $1 billion in capital commitments. WRE News previously covered the fund’s final closing; this $231 million project financing is a separate development.

For housing markets, the important measure will be delivered units, not merely capital committed. The proposed conversion could remove 337,000 square feet of older office space from Manhattan’s commercial inventory while adding rental housing, including income-restricted apartments if the plan proceeds as described.

What remains to be established

Northwind did not publish the exact legal origination date or closing hour. Its release establishes that the loan was announced November 2, and that the developers acquired the property in April 2025. No construction completion date or final affordability schedule was independently verified.

Primary source: Northwind Group, November 2, 2026 financing announcement.

Featured image: Illustrative Manhattan streetscape, not identified as 675 Third Avenue. Photo: ubeyonroad/Unsplash.

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