The park is owned by Cardiff Council and managed by its Parks department. The parkland is highly visible and accessed from local communities. The parkland is lined with avenues of trees and large grassed areas. The park is also used for sporting events.
Llandaff Fields were purchased for Cardiff Council from the mill-owning Thompson Family in 1898. The park is located on a historically important route between the city centre and Llandaff.
In 1860, an extension of the park northwards for athletic purposes was announced, and took place in 1879, merging with Pontcanna Fields. Development of the park took place between 1899 and 1901. Three cricket pitches, a hockey pitch and a tennis court were added. Plans were submitted for a swimming pool, which closed early 1990s. Features such as a fountain pool, rockery and fern dell were mentioned in the 70-acre (280,000 m2) area in a gardening magazine in 1923, but have since gone. 40 acres (160,000 m2) of the fields were used for allotments during the war.
The 2008 National Eisteddfod was held on Llandaff Fields, the consequence of which was still a problem in April 2010 after a part of the fields remained waterlogged. Cardiff Council has since announced £400,000 redevelopment plans for the pitches with under-soil drains.
In July 2010 Cardiff Council rejected an application for a car park outside the University of Wales Institute, Cardiff, citing that it would harm the character and appearance of the Llandaff Conservation Area, result in the loss of open space in the city, and worsen traffic congestion on Western Avenue.
The park is made up of a mixture of vast mown grass land and woodland areas home to wildlife. The park is situated in the valley of the River Taff. Mature trees are frequent throughout the park, such as the Horse Chestnut and Lime trees 
The park is an area of mown grass crossed by a network of tarmac walks, bounded by roads on all sides but the east, where most recreational facilities are found.
The fields, together with the adjacent Pontcanna Fields, form a large wedge of open space, situated on the west bank of the River Taff, stretching from the city centre out to the west of Llandaff. Sophia Gardens lies just to the south of the area and Bute Park is located on the other side of the river.
Access by foot to the park is from the surrounding streets in the respective communities. The Taff Trail cycle route runs through the nearby Pontcanna Fields, just to the north of Llandaff Fields. Bus services run along Cathedral Road and Cardiff Road, to the south and east of the park.
The park has sport pitches designed for many different sports, as well as tennis courts and bowls facilities, and a playground. Llandaff Fields Tennis Club is based in the park. Changing rooms, toilets and parking are provided at Llandaff Fields.
- Cardiff Council: Llandaff Fields Archived 2011-06-09 at the Wayback Machine.
- Cardiff Council: Countryside on your doorstep - Llandaff Fields[permanent dead link]
- Pontcanna Fields and Llandaff Fields (pdf), Coflein.gov.uk.
- "No, it’s not a lake, it’s Llandaff Fields!", Wales Online, 3 April 2010. Retrieved 2015-12-11.
- GuardianCardiff | Llandaff Fields car park refused
- "Llandaff Fields Tennis Club". Archived from the original on 2012-09-12.