[1] The park occupies 80% of the Tamar site public space[2] and is managed by the Leisure and Cultural Services Department of the Hong Kong government.

The Tamar Development Project was restarted when Hong Kong chief executive Donald Tsang announced in his policy address for the financial year 2006 that Hong Kong's Central Government Offices, Legislative Council Building and the Office of the Chief Executive would be relocated to Tamar site, Admiralty.

[8][9] Whilst the opening ceremony of the Central Government Offices was hosted by the Vice Premier of the People's Republic of China Li Keqiang on 18 August 2011 and moving on-site started,[10] Tamar Park opened to public on 10 October that year.

[3] There is also a water feature and a gallery/cafe, iBakery Gallery Café, operated by Tung Wah Group of Hospitals.

[11][12] The Park is planted with Axonopus compressus for the grass,[2] and planted Chukrasia tabularis, Michelia chapensis, Cinnamomum camphora, Bauhinia variegata, Ficus microcarpa and Bauhinia blakeana which is the floral emblem of Hong Kong and 400 different varieties.