White Marsh is about to get a serious influx of high-end renters. A $148 million, 335-unit luxury apartment complex is rising inside Greenleigh, the sprawling mixed-use campus east of Baltimore, adding hundreds of market-rate rental homes to the White Marsh and Middle River area and ranking as one of the largest multifamily starts in Baltimore County this year.
As reported by Baltimore Business Journal, the development is a $148 million, 335-unit luxury multifamily complex that has moved into active construction. Reporter Melody Simmons noted on May 29, 2026, that the project is another step in Greenleigh's ongoing build-out.
Greenleigh's Long Arc
Greenleigh has long been pitched as a roughly 1,000-acre live-work-play community, with single-family homes, townhomes, office space, retail, and a hotel, according to St. John Properties. St. John and partner Somerset Construction have already steered earlier residential phases, including the Arbors and The Berkleigh, setting the stage for more dense multifamily construction.
Project Specifics and Green Credentials
Design and green-building listings identify the new complex as The Aspen at Greenleigh. The project appears on GBIG's registry with a LEED v4 registration and an address at 6210 Greenleigh Ave. In its portfolio, Aumen Asner describes The Aspen as a multi-building luxury development with significant amenity space, signaling that residents are not exactly signing up for bare-bones living.
Market Context
Regionally, new development has cooled since 2023. Harbor Stone Advisors' Q1 2026 report finds that Baltimore County had about 571 units under construction, which makes a 335-unit start stand out in a big way. The same report notes that relatively measured suburban development has helped keep the county's fundamentals on a steadier footing, a trend closely watched by lenders and investors who do not love surprises.
What It Means Locally
The new apartments arrive as Greenleigh has been steadily adding office tenants, including Prometric, Dachser, and OneMain, which developers cite as proof that the campus can support more housing and services, per CityBiz. Hoodline also covered Prometric plants its flag in March, noting that the tenant gives the campus a marquee headquarters to market to other prospects.
