Riverside's Waterfront Building Exemption Didn't Survive the Summer

In February 2026, Marilyn Bastide Weissman and Alan Weissman sat through a Greenwich Planning and Zoning Commission meeting that had turned into something closer to a trial. The couple, 38-year Greenwich residents, had paid $4,000,000 in May 2025 for a half-acre lot on Shoal Point Lane, a cul-de-sac in Riverside facing Greenwich Cove, and wanted to build a house there. Neighbors packed the Zoom call. A resident named Rosenberg argued that raising the grade six feet with fill ran against the coastal management standard that fill should shore up existing structures, not enable new ones, and asked the commission directly whether the house would make things worse for the neighborhood in the next big storm. An independent ecological consultant the town brought in, George Logan of Rema Ecological Services, told the commission the file wasn't ready to approve: "My conclusion is redevelopment is not foreclosed," he said, "the current record is not complete." A commissioner asked whether a single surviving oak tree, the last of a grove a previous owner had clear-cut without permits, could be saved. The state's environmental agency hadn't finished weighing in. By April, with a decision deadline already extended once, the application was withdrawn.

That fight looked like a dispute over one lot. It was actually a preview of what every new single-family house on Riverside's waterfront now has to go through, no exceptions, because of a rule change that took effect at the state level almost a year earlier and only caught up in Greenwich's own zoning code this past August.

The Shortcut That Used To Be Automatic

For decades, Connecticut's Coastal Management Act let towns exempt the construction of an individual single-family home from full coastal site plan review, as long as the house wasn't within 100 feet of a coastal resource like a tidal wetland, beach, or bluff. Greenwich adopted that exemption. It meant a builder putting up a new single-family house on a typical Riverside lot, set back from the water's edge, could often skip the long-form review that applies to bigger commercial or multi-unit projects.

Public Act 25-33 deleted that exemption outright, effective October 1, 2025. The distance test disappeared with it. Every new single-family residential structure inside the state's Coastal Area Management boundary is now subject to site plan approval by the local zoning commission, regardless of how far it sits from the water. The same act added a second layer specifically for flood-prone parcels: coastal site plans located in a special flood hazard area must now be referred to the state's Department of Energy and Environmental Protection for comment before the local commission can act, something previously required only for shoreline flood and erosion control structures like seawalls and bulkheads.

Greenwich's Code Took Eleven Months To Catch Up

Here's the part that made 2026 an unusually messy year to be filing one of these applications in Riverside. Greenwich's own Building Zone Regulations still listed the old single-family exemption in Section 6-111, the town's Coastal Overlay Zone rule, for roughly ten and a half months after the state had already erased it. The town didn't formally strike the exemption from its own code until Application PLPZ 2026 00273, a zoning text amendment the Planning and Zoning Commission approved on August 4, 2026, with an effective date of August 12, 2026, just weeks before this writing.

The 22 Shoal Point Lane application sat squarely inside that gap. It was filed in 2025, worked through hearings in February and April of 2026, and was reviewed under a state statute that had already removed the shortcut while the town's own regulations hadn't yet been rewritten to say so plainly. That's not a technicality. It's the kind of ambiguity that turns a project timeline into a moving target, and it's exactly the sort of detail a buyer researching a Riverside teardown lot on a portal listing will never see.

What Full Review Actually Looks Like

The Shoal Point Lane file shows what "full coastal site plan review" means in practice, not in statute language. The property sits partly in FEMA's X flood zone and partly in the AE-15 zone, which triggered the new DEEP comment requirement. Preliminary comments from DEEP arrived the same day as one of the hearings, with the agency indicating more would follow. The commission brought in its own outside ecological reviewer rather than relying solely on the applicant's engineer. Neighbors submitted video of past flooding and high tides as part of the record. The commission chair, Margarita Alban, noted publicly that a recurring theme in public comment was a request for a higher degree of sustainability in the design.

That same spring's Greenwich Planning and Zoning agenda also carried another full coastal site plan application for a waterfront teardown elsewhere in town, one that proposed demolishing an existing house, replacing the seawall, and building new with a floating dock, boat lift, and timber pier. Two ambitious waterfront rebuilds working through the same expanded review in the same season isn't a coincidence. It's what the post-October 2025 rule looks like once it's actually being applied.

Renovate Or Rebuild: The Math Just Shifted

Here's the detail that matters most if you own, or are considering buying, an older house on Riverside's waterfront. The exemption that disappeared applied specifically to new construction of a single-family structure. It did not touch the separate, narrower exemption that still covers minor additions and modifications to an existing building. That distinction didn't matter much before October 2025, when most new single-family builds away from the water's edge could already skip full review anyway. It matters a great deal now.

A homeowner adding a second story, expanding a kitchen, or reworking an existing footprint on a Riverside waterfront lot can often still avoid the long-form coastal site plan process. A homeowner who tears the house down to build new cannot, no matter how far the new structure sits from the shoreline. That gap in process, cost, and timeline is wider than it was a year ago, and it's a real input into the renovate-versus-rebuild decision for anyone holding an older house on the water in Riverside.

Flood zone status compounds the calculation. Stretches of Willowmere Avenue, Cary Road, and the Rocky Point area sit in FEMA's AE zone along the tidal Mianus, with VE zones closer to where the river meets Long Island Sound. A rebuild in one of those zones now carries the added DEEP referral layer on top of the local commission's review, the same layer that slowed the Shoal Point Lane file down.

What This Means If You're Buying or Selling in Riverside

• If you're eyeing a waterfront teardown lot in Riverside, treat full coastal site plan review as a certainty in your budget and timeline, not a contingency. Nothing about distance from the water exempts a new single-family structure anymore.
• If the parcel sits in a flood zone, build in time for a DEEP comment period. The 22 Shoal Point Lane file shows that comments can arrive late in the process and can prompt a commission to ask for more information rather than approve on the spot.
• If an existing house on a waterfront lot mostly works, an addition or renovation still has a narrower, faster review path than tearing down and starting over. That gap is worth pricing out before committing to a full rebuild.
• If you're selling a Riverside waterfront property with teardown potential, set realistic expectations with buyers about timeline. A process that can run from initial filing through multiple extended hearings, as it did here, changes how a buyer should think about carrying costs.

Frequently Asked Questions

Does this affect homeowners who only want to renovate, not build new? Not directly. The exemption that was removed applied to new single-family construction. Minor additions and modifications to an existing structure remain covered by a separate exemption category, so most renovation projects aren't subject to the same expanded review.

Is this specific to Riverside, or does it apply across Greenwich? The state law and the local zoning amendment apply anywhere within Connecticut's Coastal Area Management boundary, which includes waterfront areas of Old Greenwich, Belle Haven, and Byram as well as Riverside. Riverside is affected broadly because the neighborhood is bordered by the Mianus River, Cos Cob Harbor, and Long Island Sound.

How long does a coastal site plan review typically take now? There's no fixed timeline, but the Shoal Point Lane file offers a real data point: an application that entered hearings in February 2026 was still pending with an extended decision deadline in April before it was withdrawn, a span of several months for a half-acre lot.

Where can I check if a specific Riverside address falls inside a flood zone? The Town of Greenwich points residents to FEMA's flood zone maps as the only legally determinative source, alongside the town's own Coastal Overlay Zone map, both available through the town's Planning and Zoning office.

Riverside's waterfront math changed this year in ways that don't show up on a listing sheet. If you're weighing a teardown against a renovation, or trying to price a waterfront lot that will need to go through this process, Spencer Sodokoff can walk through what a specific address is actually facing before you make an offer. Request a free market consultation to start that conversation.