The best starting place to find archival sources for the history of property-holding in medieval London is: A Survey of Documentary Sources for Property Holding in London before the Great Fire, ed. D. Keene and V. Harding, London Record Society, vol. 22 (London, 1985). The editors survey documents of title (charters, deeds, copies from cartularies); documents stemming from the management of property, (rentals, surveys, accounts, and plans, among other records); and administrative and judicial records of London properties that were part of the estates of the City and Crown, including escheats, taxes, the regulation of nuisance, and disputes over ownership. On BHO.
Many of the document collections listed under Law also contain records dealing with London properties and their owners.
London Possessory Assizes London Possessory Assizes: A Calendar, ed. Helena M. Chew, London Record Society, 1. London, 1965. English translations of the assizes of novel disseisin (known in London as assize of fresh force) and a few cases of mort d’ancestor held before the sheriffs and coroners, 1340-1451, with individual pleas for 1317, 1380, and 1470 calendared in the appendix. Plaintiffs initiated the complaint (which could involve lands, tenements or rents) at the Monday session of the Hustings Court of Pleas, but it was heard before a jury impaneled by the sheriffs. On BHO.
Cartularies of Two London Citizens A Calendar of the Cartularies of John Pyel and Adam Fraunceys, ed. S. J. O’Connor. Camden Society Fifth Series, 2 (London 1993). English calendar of cartularies of two wealthy merchants and mayors of late fourteenth-century London that show their land acquisitions in London and elsewhere. Includes full analysis of the careers and properties of Pyel and Fraunceys in the introduction. A digital edition is available thru subscription-based Cambridge Core of Cambridge University Press.
Abstracts of Inquisitiones Post Mortem relating to the City of London Abstracts of Inquisitiones Post Mortem relating to the City of London. Part I. 1 Henry VII to 3 Elizabeth, 1485-1561, ed. George S. Fry, British Record Society, Index Library 15, and London and Middlesex Archaeological Society (London, 1896). Pages 5-55 print English abstracts of inquisitions held on the death of tenant-in-chiefs of the king in London to determine the feudal rights belonging to the king; a group of jurors (named) identify the properties held by the deceased and the rightful heir, some of whom also undergo proofs of age. Held in the Guildhall, the inquisitions offer brief descriptions of the size, nature, and location of London properties held by the deceased. On BHO and archive.org.