A 2 Million Square Foot Data Center Is Back on the Table Near Conshohocken. Here’s What It Means for Local Home Values

By Josh McKnight | The McKnight Team

A controversial 2-million-square-foot AI data center has been resubmitted for zoning approval in Plymouth Township, less than a mile from downtown Conshohocken. Six months ago, the same developer pulled the application over a legal technicality. Now it’s back. More than 1,200 residents have already signed a petition opposing it.

If you own a home in Conshohocken or Plymouth Township, this matters.

What’s Being Proposed in Plymouth Township

Main Line developer Brian O’Neill wants to build the data center on the 66-acre site of the shuttered Cleveland-Cliffs steel mill along the Schuylkill River. The tenant is described as life sciences-related but has not been publicly named. The Plymouth Township zoning hearing board must schedule a public hearing within 60 days to determine whether a data center qualifies as a permitted use in the area’s heavy industrial zone.

Even if the zoning board says yes, the project still has to clear additional review and public meetings through the land development process. This is far from a done deal. But it is now officially live again.

Resident concerns have been consistent across the region. Noise. Light pollution. Air pollution. Water consumption. And the one most homeowners ask about quietly: what does this do to my property value?

What the Local Market Looks Like Right Now

Conshohocken real estate is hot. The median sale price in Conshohocken Borough in April 2026 was $551,000, up sharply from $405,000 in January according to Bright MLS data pulled May 10. Average days on market in April was 17 days. That is fast. Year to date, 39 homes have closed in Conshohocken with a median sold price of $435,000.

For perspective, current inventory sits at just 32 active listings borough-wide with a 2.5 month supply. That is still a clear seller’s market. Buyers are paying up because Conshohocken offers a rare combination in our region: walkability, the Schuylkill River Trail, train access into Center City, and a downtown that has been steadily growing for a decade.

A data center that big, that close to that downtown, changes the conversation.

What This Means for You

If you are thinking about selling in Conshohocken in the next 12 to 18 months, you have a window. The market is strong, days on market are short, and demand is real. Waiting to see how the data center plays out is a strategy, but it is not without risk. Public opposition can stall projects, but it does not always kill them.

If you are buying in Conshohocken, do not panic. Conshohocken’s fundamentals are not changing overnight. Walkability, transit, and a vibrant downtown are still drivers. But ask your agent to factor proximity to the Cleveland-Cliffs site into your offer math, especially for homes on the Plymouth Township side of the line.

Either way, this is a story to track. Local zoning fights shape Montgomery County real estate values more than national headlines do.

Thinking about buying or selling in Conshohocken? Let’s talk.