A new proposal would put more creative architecture at the former Domino Sugar factory site in Williamsburg.

The developer says only an extraordinary project is worthy of the historic site -- so it is backing off its initial plan for something more ambitious.

Among the changes, the new design would replace a rectangular ceiling with an arch to pay homage to the original structure's arched windows. Other parts of the redevelopment are already underway.

The first tenant moved into the 325 Kent building earlier this summer, and crews broke ground on a second mixed-use building in April. A 6-acre Domino Park is slated to open on the waterfront next spring.

"We want to do something innovative that we think reflects the culture of Williamsburg, the culture of New York," said David Lombino, the managing director of Two Trees Development.

The change in design still needs approval from the city Landmarks Preservation Commission, which is expected to be requested at a hearing at the end of the month.