Please answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Langtons -  Langtons House and Langtons Gardens are a grade II listed 18th-century house and landscaped gardens located in Hornchurch in the London Borough of Havering Greater London. The house and gardens became local authority property in 1929 and are currently used as the borough register office and a public park. Langtons House was used as the council offices of Hornchurch Urban District Council from 1929 to 1965.
Answer:
Building