If you happen to be strolling along Flatbush Avenue in Kensington on Sunday evening, don’t be alarmed if you see nearly 300 people seated in the middle of Westminster Road staring at a front porch. The Brooklyn-based Brave New World Repertory Theatre is putting on a one-night-only outdoor performance of Christopher Sergel’s adaptation of “To Kill a Mockingbird.”

The performance will take place on the front porches of six Victorian houses. Center Stage is the home of the company’s co-artistic director and producer, Claire Beckman, and actor and board secretary Christine Siracusa. On the same porch less than a year ago, the two friends threw around ideas about the company’s next project, to follow their inaugural production of “The Importance of Being Earnest.” The company wanted to display the talent of black actors in Brooklyn, so the idea of producing “To Kill a Mockingbird” arose. Their block of grand front porches and large old trees made the story seem close to home.

The classic coming-of-age story follows a tomboy named Scout Finch and her older brother growing up in the fictional town of Maycomb, Ala., at a time when Jim Crow’s laws were as real as the racism they promoted. The plot centers on the trial of a black man defended against a rape accusation by the children’s father, Atticus Finch.

Ms. Beckman converted the stage script into what she called a “continuous movie.” Performing the story in an environment similar to the original setting would give the company “an opportunity to bring new life to the well-known story,” Ms. Beckman said. With the help of her husband, John Morgan; associate director and designer Amy Ilias; some body microphones, and parking permits, the company was ready to go. Then, of course, there were the actors.

Three child actors will play the leads. “I have been working with them since February,” Ms. Beckman said. “They really are quite terrific.” Her daughter, fourth-grader Taylor Morgan, will make her professional stage debut as Scout Finch. (Ms. Beckman will portray the adult Scout.) Ms. Morgan is a founding member of the Dreama Players, a group of child actors in Brooklyn. She will perform alongside Zak Stevens as next-door neighbor Dill and high-school freshman Jeremy White as Jem. The remaining cast will include most of the Brave New World Theater company.

The show will serve as a finale for the Flatbush Frolic, a street fair on Cortelyou Road. According to Ms. Beckman, the company’s motto throughout the endeavor has been “If you build it, they will come.” If that isn’t incentive enough, admission is free.

Sunday, 7 p.m., Westminster Road between Beverley and Cortelyou roads, Brooklyn, 917-660-4600, free. Rain date: September 25.