The firm, which operates six parks in northern England and Scotland and is sold through Hoseasons, has also opened a new head office in Lancaster, creating 20 jobs.
It said it has already seen an 11% year-on-year increase in bookings for 2017 and next year predicts its “most successful year yet”.
At Verdant Leisure’s Berwickshire coastline parks, Thurston Manor and Pease Bay, the investment will be spent on Thurston Manor’s restaurant and lounge bar facilities, as well as new accommodation and pitch development.