Residents of the town of Chevy Chase seeking to renovate their homes will soon have to comply with building restrictions that limit house size and height, after town council members unanimously passed new regulations aimed at curbing so-called “mansionization.”

The new rules take effect May 17 and limit building height to 33 feet, restrict driveway width to 10 feet and use “floor area ratio” to keep the square footage of homes in line with property size. Council members say they were attempting to find a compromise.