Bird-enriched rendering by Embarc. Youth Enrichment Services and Watermark Development have filed plans with the BPDA to replace an electrical contractor's building on Amory Street with a new headquarters for the non-profit group and a separate four-story, nine-unit residential building. YES, which provides "affordable and impactful sports-based youth development and leadership programming" for roughly 1,600 kids a year in Dorchester, Roxbury and Mattapan, would use the lot recently vacated by J&M Brown Co. - which moved to Dedham - at 267 Amory St., near New Minton Street and overlooking the Southwest Corridor. The street is already home to a number of non-profit groups, including the Jamaica Plain Neighborhood Development Corp., which owns the Brewery complex on the other side of Amory.