A pair of nonprofits are partnering on plans for a 19-story mixed-income project on the edge of Boston’s Chinatown neighborhood, which is battling displacement from short-term rentals and luxury housing.

The St. Francis House day shelter and the Archdiocese of Boston’s Planning Office for Urban Affairs propose 126 apartments in a 132,045-square-foot tower at 41 LaGrange St., replacing a vacant lot.

“The project will achieve a key goal of bridging the existing income gap in the neighborhood and alleviating displacement of Chinatown residents by providing affordable housing for a range of low and moderate-income residents, including clients of St. Francis House and other homeless individuals,” developers wrote in a submission to the Boston Planning and Development Agency.

Housing activists say Chinatown has been disproportionately affected by conversion of apartments into short-term rentals, and approximately 2,000 luxury and market-rate housing units have been built in the neighborhood in recent years. The 41 LaGrange St. developers say approximately 40 percent of the units in their project would be reserved for households earning 70 percent or below the area median income, well above the city’s minimum requirement of 13 percent.

No on-site parking is proposed, but developers said they will include one bicycle storage space per unit. The Architectural Team of Chelsea is the architect. Developers hope to break ground in spring 2020 and complete the project in 2022.

The proposal is the second phase of a development partnership between the two nonprofits, which are nearing completion of 46 affordable apartments including 26 for former homeless people in a renovation of the former Boston Young Men’s Christian Union building at 48 Boylston St.