When district councils were established in December 1894, Nettleden was included in the Berkhamsted Rural District, which was temporarily allowed to straddle Hertfordshire and Buckinghamshire pending Nettleden being transferred to Hertfordshire, which happened on 30 September 1895.

The hamlet of St Margaret's, formerly belonging to Ivinghoe in Buckinghamshire, was added to the parish of Nettleden in 1895 at the same time as the county boundary change.

The school closed one week after the end of the war in Europe, when all the boys were returned to their homes in London.

[4] From Nettleden to Frithsden runs the Roman Road or Spooky Lane, named in reference to the ghost of an Ashridge monk.

In the early 19th century, the lane was dug deeper into the hill, with high revetted walls on both sides, and a bridge was built over the lane, in order that people using the driveway leading to Ashridge did not meet the villagers.