A rendering of the proposed project at 446-450 Cambridge St. in Allston.
A rendering of the proposed project at 446-450 Cambridge St. in Allston.
(Boston Redevelopment Authority)

A developer is proposing to raze the longstanding DoReMi Karaoke studio in Allston to build a $7-million, four-story mixed-use building with 40 apartments, ground-floor commercial space and underground parking, according to plans filed with the Boston Redevelopment Authority.

The plans filed by Arcand Family/Allston, LLC also call for a fitness center, roof decks and a management office inside the proposed 49,810 square-foot building at 446-450 Cambridge St.

Five of the apartments would be designated as affordable housing. The proposed commercial space would measure 1,631 square feet. There would be a total of 40 vehicle garage parking spaces along with space for 40 bicycles.

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The plan calls for demolishing DoReMi, which opened in 1997 at 442 Cambridge St., and a small house behind it that is currently used as an office.

The project would reconfigure the existing lot lines of 442 and 450 Cambridge St. and the abutting 7-9 Craftsman St. property, the proposal says. A two-story mixed-used brick building at 7-9 Craftsman would remain as would a 17-space surface parking lot at 450 Cambridge.

The proposal also calls for building a new green space with bench seating between the two-story building and the new building and other landscaping measures.

The plans were formally filed with the redevelopment authority last week and are subject to public review by the authority.

The Allston Brighton Community Blog first reported on the filing of the development plans.