Richard was one of the four sons of the successful York mercer, Robert Louth. When his father died in 1407, he was still a minor, and it was not until 1415 that he was admitted to the freedom of the city. In the same year he was admitted to the guild of Corpus Christi along with his mother.
Membership of the council of 24 almost certainly followed at the end of Louth’s shrieval year, but it was not until March 1432, when he was again present at the parliamentary election, that his membership of that body can be proven. By this time he was also prominent in the York Mercers’ Company. In April 1430 Louth was among the senior members of the company, including William Bedale*, who met to fill a vacancy which had arisen in the hospital of Holy Trinity. In March 1433 he was elected as master of the company, a position he held for the customary one year.
Scant evidence survives of Louth’s private affairs. In October 1437 he was pardoned of his outlawry before the justices of the common pleas for his failure to answer Master John Forster, prebendary of Fridaythorpe, in a law suit for a substantial debt of £100.
