Developers who want to tear down a single-family home in South Boston to put up a five-unit condo building are facing opposition to ongoing gentrification from the neighborhood, as well as local elected officials.

At a meeting last night with the developers and city officials to provide an overview of the project slated for 202 M St., Ellen Duffley, who lives next door, said she and the neighbors are prepared to fight.

“The whole area is beautiful. To start changing that is heartbreaking,” she said. “The whole project is throwing the neighborhood under the bus for money. … We will be working to stop the project as a community. Not just me. As a community.”

Patrick Mahoney, a lawyer representing the developers, said the project meets all zoning regulations, but needs the community to support the design, material, and landscaping to proceed. The 40-foot-tall building would include parking, with five condo units and a roof deck.

John Mullen, 74, called the proposed building an “architectural atrocity.”

“Does that building look anything like these buildings here? You should be ashamed of yourself,” he said. “I’m very angry. It’s a beautiful, beautiful house.”

Richard Adair, 72, said, “I live next door, about 15 feet from the crater they’re going to make. I don’t want five families living next door to me. Secondly, as much as I don’t like the construction job, it is not architecturally consistent with the neighborhood it’s in. This is quite a unique area. Nothing’s changed here for 90 years, now you’re just going to drop this bomb on the corner.”

City Councilor Michael Flaherty, who represents the district, told the crowd he spoke with U.S. Rep. Stephen F. Lynch, state Rep. Nick Collins, and City Councilor Bill Linehan, who also oppose the project.

“We’re 100 percent behind the community and we’re 100 percent opposed to what’s being proposed here,” Flaherty said.

He said this single-family home could be the first of dozens to face the wrecking ball, unless they can increase the parking requirement inside the zoning law.

“They’re going to go door-to-door. … All the houses on Marine Road,” Flaherty said. “Someone could knock on their door, pay them $3 million for their house. They’ll knock down those two-families and they’ll put up six or eight units. This is the catalyst folks, to what’s going to happen.”