It’s the largest and most difficult build “Extreme Makeover: Home Edition” has ever done. The project was the first in New Jersey for the Emmy Award-winning reality television show it involves demolishing the burned-out shell of a former home on a narrow lot in an urban neighborhood and rebuilding a new home in its place in a week.

Though the site poses extraordinary challenges, Piscataway-based Edgewood Properties and Clifton-based Century 21 Construction Corporation have stepped forward. Together, the two construction companies will lead a team of more than 3,000 construction workers, subcontractors and tradesmen who will work around the clock for a week starting April 23 to build a new house and garage for the Turner family of Irvington, whose home was destroyed by fire last year. Beverly Turner, 54, is a single mother of nine adopted special-needs children.

The house will be the largest and highest ever built by “Extreme Makeover: Home Edition.” Adding to the difficulty of the build is the 50- by 124-foot lot, the narrow roadways, the need for handicapped access and the limited space for staging due to the dense development in the vicinity of the building site. Although the show allows seven days for the build, the actual construction time will be only four days since time must be set aside at the beginning for site preparation and at the end for the design team to decorate and furnish the house.” This is the Super Bowl of construction,” said Joe Marino, president of Century 21. Edgewood and Century 21 are involved every day in challenging redevelopment projects. Although they are separate business entities, the two companies have collaborated on a number of successful projects throughout New Jersey over the last three years.