Mill Green Golf Club opened in 1994.
The Club took its name from the nearby hamlet of Mill Green with its picturesque water mill on the River Lee. There has been a water mill here since the time of the Domesday Book. The Club land originally belonged to Hatfield House, the current house is a 17th Century Jacobean house belonging to Lord Salisbury but the original building was a Royal Palace used by many famous Kings and Queens including King Henry VIII and Queen Elizabeth I.
Apart from being part of a Royal Estate the land has been used as a training facility for World War I tanks, RAF Camp during the Second World War, and a camp for builders of the new town of Welwyn Garden City.
Peter Allis and Clive Clark were chosen from leading international golf course architects to translate the natural and varied features of the Mill Green land into a course of unusual beauty and variety. The original layout had the 1st tee starting at the 10th and the 18th finishing at the Clubhouse (now the 9th).
The official Opening of the Club was Saturday 22nd January 1994 at 8.30am. An exhibition match of Mill Green Professionals and professionals from 3 other clubs was played with members encouraged to spectate. A dinner and dance was held in the evening. On Sunday 23rd January 1994 the Captain's Drive In was held for the first time and on the Monday 24th January play began on the golf course.