What's Being Built on Port Washington's Waterfront at 403–415 Main Street?
A four-story mixed-use development is advancing through the Town of North Hempstead's approval process at 403–415 Main Street in Port Washington — right along the waterfront. Brownfield cleanup filings, ownership ties to the Rothman group (the same group behind Louie's), and a dedicated development entity called Manhasset Bay Real Estate LLC all point to a coordinated project that's already past the early speculation stage. Here's what the filings reveal, what it could mean for the waterfront, and why this matters whether you own property in Port Washington or you're thinking about buying.
By Eric Berman | April 20, 2026
There's a development taking shape on the Port Washington waterfront — and by the time most people hear about it, the trajectory will already be locked in.
This isn't a rumor or a "what if." There are filings. There's an ownership trail. The Town of North Hempstead has already issued notices tied to plan review and a special use permit. And the site in question — 403 to 415 Main Street — sits right along the water, just down from Louie's.
I broke this down in detail in the video above, but here's what you need to know — and what it could mean for real estate values, waterfront access, and the future direction of Port Washington.
The Filings Are Already In
The properties at 403–415 Main Street show up in state filings tied to New York's brownfield cleanup program. That's a significant step — it means the site is being formally prepared for redevelopment, and that kind of filing doesn't happen at the brainstorming stage. It shows up once a project is already being worked through.
The ownership behind those parcels connects back to the Rothman group — the same group associated with Louie's, just down the street. So this isn't an outside developer parachuting in. It's a group that already operates in the exact same waterfront corridor. Watch Eric break this down at 1:32.
There's also a separate entity in the filings — Manhasset Bay Real Estate LLC — which is submitting the brownfield application. One entity tied to operations, another tied to development. That structure is deliberate, and it points to a coordinated project with real momentum behind it.
The Town of North Hempstead has already issued notices for a plan review and special use permit on these properties. That means the project has entered the approval process. It's moving.
What's Being Proposed
Local discussions point to a four-story mixed-use building — commercial space at ground level, residential units above. What hasn't been defined publicly is whether those units will be rentals, condos, or a mix. But the direction is clear: this stretch of Main Street is being repositioned from low-rise waterfront uses to something significantly more dense.
If you've walked that part of Main Street recently, you already know the contrast. On one side, active waterfront businesses. A few steps further, older structures, vacant storefronts, less foot traffic. That kind of gap on a waterfront usually signals one thing — the area is in transition. And the filings confirm it.
Why Port Washington Residents Are Concerned
The concerns being raised locally are consistent, and they're worth understanding whether you own here or you're considering buying in.
Scale. A four-story building on that stretch would be a visible change. Right now, the area is relatively low-rise and tied to smaller waterfront businesses. A larger structure would fundamentally alter the look and feel of that part of the harbor.
What gets displaced. That stretch of Main Street isn't just real estate — it's part of Port Washington's working waterfront. Small businesses, marine activity, informal access to the water. Redevelopment always raises the question: what gets replaced, and what doesn't come back? If you're a homeowner who values the current character of Port Washington's waterfront, this is the concern that cuts deepest. For sellers thinking about how showings and buyer interest in Port Washington could shift, changes to the waterfront corridor are worth watching closely.
Traffic and parking. Port Washington is a peninsula with limited access points. Main Street is already a pressure point during peak hours. New residential units add cars, deliveries, and foot traffic to an already constrained corridor. Watch Eric walk through the traffic concerns at 4:41.
Infrastructure and flooding. Building closer to the bay brings real questions about stormwater management, flooding risk, and long-term resilience. These aren't hypothetical — they're engineering realities that affect insurance costs, maintenance, and property values for surrounding homes.
Direction. For some residents, this isn't just about one project. It's about precedent. More mixed-use development along the waterfront, more density over time — and the question of where that trajectory leads for a community that values its current character.
If you own property in Port Washington or on the North Shore and you're wondering how waterfront development could affect your home's value, Eric Berman and his team at Compass Greater NY can give you a clear, data-backed picture of where your market stands. Reach out at eric@ericbermanre.com, call 917-225-8596, or visit theericbermanteam.com.
The Other Side of This — Downsizing Options That Don't Exist Yet
Here's what's getting less attention in the conversation, but it matters just as much.
Talk to longtime homeowners in Port Washington and a pattern comes up. They want to stay. They don't want to leave the area. But at a certain point, maintaining a full-size house with more rooms than you need stops making sense. The yard work, the upkeep, the carrying costs — it adds up.
The problem? There aren't many places in Port Washington where someone can downsize, stay local, and move into a newer, low-maintenance space — especially near the water. That's a real gap in the market. And it's a constraint that pushes people out of the community when they'd prefer to stay. If you're in that position, understanding how to prepare financially before selling is a critical first step.
Communities like Harbor View have shown there's real demand for that kind of transition. People staying in Port Washington, just in a different type of home. And those developments tend to be received differently — because the people moving in are often already part of the community.
So depending on how this project is designed, the key question becomes: does it add pressure, or does it provide an option that doesn't currently exist? That distinction shapes everything — how the project is perceived, who it's actually built for, and whether it strengthens or strains the community.
For buyers evaluating where to put down roots on the North Shore, this is the kind of local dynamic that doesn't show up in listing data but absolutely affects long-term value. Understanding whether a town is positioned for long-term appreciation means looking at development patterns, infrastructure investment, and what the community is building toward.
What Happens Next
Right now, two things are happening at once.
On one side, a project is clearly moving forward — filings, ownership structure, environmental work, town review. On the other side, the community has real concerns about scale, traffic, infrastructure, and the long-term direction of the waterfront.
What's not clear yet is how those two sides meet. What gets approved. What gets changed. What the final version actually looks like.
What is clear: this is no longer hypothetical. It's already in motion. And this stage — before renderings, before marketing, before public rollouts — is where understanding what's happening matters most. Because once it becomes visible to everyone, the direction is already set. Watch Eric's closing thoughts at 7:53.
Whether you're a homeowner in Port Washington watching this unfold, or a buyer trying to understand which North Shore communities are worth investing in, the trajectory of this waterfront matters. It will affect property values, the character of Main Street, and what Port Washington looks and feels like in five years.
If you want a clear read on how this development — or any local market shift — affects your specific situation, that's exactly what my team and I do. We track what's happening at the ground level across Port Washington, Manhasset, and the North Shore, and we translate it into real strategy for buyers and sellers. Reach out at eric@ericbermanre.com, call 917-225-8596, or visit theericbermanteam.com.
About Eric Berman
Eric Berman is a top 1% REALTOR® with Compass Greater NY, helping buyers and sellers across Queens and Long Island navigate the market with clarity and confidence. Known for his local expertise and solutions-driven approach, he leads a full-service team based in Manhasset and delivers a high-touch, concierge-level experience from start to finish. To connect with Eric, visit theericbermanteam.com, email eric@ericbermanre.com, or call 917-225-8596.
