Cassiobury is a residential area of Watford

Watford

Watford is a town and borough in Hertfordshire, England, situated northwest of central London and within the bounds of the M25 motorway. The borough is separated from Greater London to the south by the urbanised parish of Watford Rural in the Three Rivers District.Watford was created as an urban...

 in Hertfordshire

Hertfordshire

Hertfordshire is a ceremonial and non-metropolitan county in the East region of England. The county town is Hertford.The county is one of the Home Counties and lies inland, bordered by Greater London , Buckinghamshire , Bedfordshire , Cambridgeshire and...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

.

It is formed by two areas of housing: one to the north-east of Cassiobury Park

Cassiobury Park

Cassiobury Park is the principal public open space in Watford, Hertfordshire, in England. It comprises over and extends from the A412 Rickmansworth Road in the east to the Grand Union Canal in the west....

 and the other to the south. Both are built on land that was formerly part of the estate of Cassiobury House

Cassiobury House

Cassiobury House was a country house in Watford, Hertfordshire, England, now demolished.-History:The house was started in 1546 by Sir Richard Morrison. On the marriage of his granddaughter it passed into the ownership of the Capel family, later Earls of Essex. It was demolished in 1927. The...

, house of the Earls of Essex

Earl of Essex

Earl of Essex is a title that has been held by several families and individuals. The earldom was first created in the 12th century for Geoffrey II de Mandeville . Upon the death of the third earl in 1189, the title became dormant or extinct...

, which was located where Temple Close now sits.

It is favoured by commuters as it contains both Watford tube station

Watford tube station

Watford is a station at the end of the Watford branch of London Underground's Metropolitan Line in the north-western part of the network in Zone 7, previously zone A.-Location and description:...

 with direct links to the City of London

City of London

The City of London is a small area within Greater London, England. It is the historic core of London around which the modern conurbation grew and has held city status since time immemorial. The City’s boundaries have remained almost unchanged since the Middle Ages, and it is now only a tiny part of...

 and the extensive Cassiobury Park. It is one of Watford's most expensive residential areas and houses a significant amount of Watford's upper middle class. It is very popular among young families as it gives direct access to Watford's most successful primary school, Cassiobury Junior School, from which a lot of students go on to either Watford Grammar School for Boys or Watford Grammar School for Girls

Watford Grammar School for Girls

Watford Grammar School for Girls is an academy for girls in Watford in Hertfordshire, UK.Despite its name, the school accepts girls of all abilities, although a proportion are selected for academic or musical aptitude....

, two of the country's top secondary schools. At the north end of Cassiobury, is the former estate and house of the Earls of Clarendon

Earl of Clarendon

Earl of Clarendon is a title that has been created twice in British history, in 1661 and 1776. The title was created for the first time in the Peerage of England in 1661 for the statesman Edward Hyde, 1st Baron Hyde...

 that is now has been turned into a hotel and with extensive grounds called The Grove.