The plan approved Thursday by the Galveston City Council now faces state review. The Texas General Land Office in August notified Galveston that the current plan does not meet state minimum standards.
The measure would also allow Galveston to apply for state funding to replenish the beaches.
The Galveston County Daily News reports the dune conservation area would start at the 4-foot contour line and extend 75 feet landward.
A consistent offset, which is the enhanced construction area, would extend 125 feet from the landward boundary of the dune.
The plan originally proposed that the area would vary based on whether the beach is eroding.