William may well have been related to Richard Pernecote† and his son John†, who had represented their home town of Reading in the Parliaments of 1397 (Jan.) and 1414 (Nov.), respectively, and to Margaret Pernecote, the daughter and heiress of Lambert Appulman, who in 1428 occupied a house in the High Street.
Pernecote soon began to take on responsible roles in the affairs of Reading. In the following May he served on the local jury which indicted Thomas Kerver for treason, and in November 1446 he helped to collect parliamentary subsidies in the High Street, where he held property.
Towards the end of December 1462 Pernecote was one of five burgesses named with the mayor to treat with the abbot regarding continuing matters of contention between the members of the guild merchant and their lord. There were also disputes between the townsmen which needed settling, and shortly afterwards he joined a body set up to bring to an end the quarrel between William Rede* and William Linacre* on the one side and Robert Farle on the other. In September 1463, together with the current mayor and five other sometime holders of the office, he promulgated new ordinances for the administration of Reading, and that same month and again in November 1468 he shared the responsibility of assessing contributions to the parliamentary subsidies.
For four years from 1447 Pernecote had rented from the guild a garden in ‘Lorimerlane’, but he gave this up after receiving instead on 2 June 1452 a lease for 61 years of a stable and garden next to the guildhall, for which he paid 6s. 8d. p.a.
