The top reported proficiency rate is 99% in Social studies. The lowest is 83% in Science.
Original Research by School Decision on Chatsworth Avenue School
Chatsworth Avenue School sits on a residential street in Larchmont, a small, affluent village on the Long Island Sound in Westchester County. It is a public elementary school serving kindergarten through fifth grade within the Mamaroneck Union Free School District, a district shared across the Village of Larchmont, the Village of Mamaroneck, and the Town of Mamaroneck. Students who start here follow a path to Hommocks Middle School and then to Mamaroneck High School.
The academic picture is strong. On the New York State Testing Program, the school posts proficiency rates in math and English language arts across third, fourth, and fifth grades that sit in the top quartile relative to districts in Westchester County, a competitive county with many well-resourced communities. Fourth grade is the high-water mark in both subjects, but all tested grades show the large majority of students reaching proficiency. Fifth-grade science results also show most students meeting the standard. Participation in state testing is essentially universal across every tested grade and subject, which means the results reflect the full student body. The social studies data available is from a much earlier school year and is too dated to use as a current indicator. Multi-year trend data was not available in the current data set, so it is not possible to characterize direction of change over time.
Enrollment is large for an elementary school. The student body is predominantly white, with Hispanic students making up the next largest share and smaller proportions of students identifying as Asian, Black, or two or more races. The share of students qualifying for free or reduced-price lunch is low, reflecting the economic character of Larchmont more broadly. Data on students with IEPs and English learners was not reported, so a parent curious about those support systems would want to ask the school directly.
The Dos Caminos dual-language Spanish and English immersion program, publicly reported as a district initiative, began at another elementary school and has grown into a district-wide K-12 pathway now extending through middle school and into AP-level coursework at the high school. Families considering Chatsworth should clarify with the district how or whether that pathway is accessible from this particular building, since the program's origin site is Mamaroneck Avenue School.
The housing market surrounding the school is among the most expensive in the state. Home values in the area run far above both state and national benchmarks, and they have risen meaningfully over the past year. Rents are at a level that represents a very high share of a typical household's income, making the area financially demanding for buyers and renters alike. Inventory in Westchester County has tightened over the past year even as new listings have declined, and homes are moving relatively quickly. Anyone weighing a move into the Chatsworth attendance zone should factor in these conditions alongside the school itself.
Larchmont as a place is genuinely walkable by suburban standards, publicly reported to have one of the highest walkability scores in Westchester. The village center, close to the Metro-North New Haven Line station, puts cafes, boutiques, a local movie theater, and the public library within easy walking distance. The school itself is embedded in a neighborhood of residential streets, not a remote campus. Parks along the Sound and along the Premium River give families outdoor options, and the train offers a direct route to Grand Central.
At the district level, voters recently approved a capital bond by a wide margin, funding infrastructure work across all six schools, with phases extending through at least the middle of the decade. Phase one work has already been completed at the middle school and high school. This represents a sustained commitment to the physical condition of facilities a Chatsworth student will eventually move through.
Civil-rights data was not available in this data set. Chronic absenteeism rates were also not reported. A parent interested in those dimensions would want to request that information from the district.
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