Cassiobury Park

The Estate That Became a Park

Cassiobury Park occupies land with over 1,200 years of recorded history. King Offa of Mercia granted the estate to St Albans Abbey in 793 AD, and it passed through various hands until Sir Richard Morrison began building Cassiobury House in 1546. The Capel family acquired the property through marriage in 1627, and Arthur Capel — created 1st Earl of Essex — commissioned a lavish rebuild in the 1670s using craftsmen who had worked on Windsor Castle.

At its peak the estate covered 870 acres, but the family's fortunes declined through the 19th century. The house and grounds were auctioned in 1922, and Watford Borough Council purchased 184 acres for public use. Cassiobury House itself was demolished for building materials in 1927. Only the stable block survives, converted into Cassiobury Court residential accommodation. The council added further land purchases in the 1930s, bringing the park to its current 190 acres.

What to See and Do

The park divides naturally into active and wild zones. The eastern section around the Hub building is where families congregate — the splash pools with their water jets and fountains draw large crowds on summer days, and the adjacent adventure playground has climbing frames, swings and slides for various age groups. The Watford Miniature Railway departs from nearby, its 10¼-inch gauge locomotives pulling passengers on a five-minute ride through riverside woodland.

The western half is wilder. A 62-acre Local Nature Reserve managed by the Herts and Middlesex Wildlife Trust encompasses former watercress beds that have evolved into marshland and open pools surrounded by alder and willow. Kingfishers, herons and woodpeckers are regular visitors. The Grand Union Canal towpath follows the park's western edge, offering flat walks to Rickmansworth and connections to the wider canal network.

Practical Tips and Nearby

The Gade Avenue car park fills quickly on summer weekends and bank holidays — arriving before 10am or using the Metropolitan line to Watford station avoids the congestion. The Hub cafe serves hot drinks, light meals and ice cream, and there are several picnic areas with benches dotted throughout the park. Toilet and baby-changing facilities are in the Hub building.

Watford town centre is a 15-minute walk east along Rickmansworth Road, with the intu Watford shopping centre and High Street shops within easy reach. For longer walks, the towpath heads south to Croxley Green and north to Kings Langley, following the canal through the Gade Valley.