The Broad Expansion

The Broad topped out its expansion on May 13, 2026, about a year after breaking ground on the lot immediately south of the museum. The $100 million, 55,000-square-foot addition roughly doubles gallery capacity on Grand Avenue, and it brings back both firms that delivered the original: Diller Scofidio + Renfro on design, MATT Construction building it.

Project Scope

The 2015 Broad is defined by its veil and vault, a perforated concrete exoskeleton wrapped around an opaque storage core with galleries stacked above. The addition extends that logic rather than copying the form. Two open-air courtyards sit on the top floor. There’s flexible space for live programming, which the original building has never had much of.

The most interesting move is what happens to the vault. The Broad’s collection storage, normally the part of a museum the public never sees, becomes an accessible exhibit in its own right. Visitors will be able to walk into the art storage rather than glimpse it through a window off a stair landing.

Completion is targeted for 2028, ahead of the Los Angeles Olympic and Paralympic Games. The original building cost $140 million and opened in September 2015. General admission to the permanent collection stays free.

Why It Matters

Eleven years is a short interval between a museum opening and a doubling. The Broad was designed around a specific collection with a specific footprint, and it filled faster than its own program anticipated, which is a better problem than most institutions have.

Bringing the original architect and the original GC back has a practical logic beyond continuity of design intent. The veil is a bespoke glass-fiber-reinforced concrete assembly with no standard detailing, and the team that solved it the first time knows where the tolerances sit. Museums that switch teams for an addition typically spend the savings on coordination.

The 2028 date is the real constraint. Los Angeles has a hard civic deadline and a construction market that will be fully committed to Olympic venues and transit work through 2027. Topping out fifteen months early was the right call.

Project Team & Details