Developers are proposing to build a mixed-use development on 8 acres of land in South Boston.

Oxford Properties Group and Pappas Enterprises Inc. filed a letter of intent with the Boston Planning & Development Agency on April 28 for the development at 300 W. First St. and 647B Summer St. 

The project site is part of the 42-acre business park in the area the developers own and operate under a long-term lease with the Massachusetts Port Authority. 

The proposal seeks to redevelop the land and create an “inclusive and vibrant development that connects to the neighborhood in thoughtful ways and invests in creating spaces where new and current neighbors and businesses can thrive together,” according to the filing.

Area improvements include expanded public sidewalks along a section of Frist Street, new open spaces and landscaping, along with “building heights and massing that respect and connect with the adjacent South Boston residential neighborhood.”

Once complete the project will encompass 1.7 million square feet. It includes seven buildings on the 6 acres along West First Street as well as 600,000 square feet along Pappas Way. The buildings will be a mix of commercial and employment-based with a portion for residential housing to meet neighborhood needs.

Under the proposal, ground floor uses could include a neighborhood grocery store as well as fitness and wellness options, locally owned restaurants and more.