Hello Peter. You can find details of the archives closure here, http://www.sheffield.gov.uk/libraries/archives-and-local-studies/archives-temporary-closure. The West Riding Registry of Deeds at Wakefield is were you will find details regarding property ownership. The records are indexed and cover Sheffield http://www.archives.wyjs.org.uk/wyjs-archives-w-r-registry-d.asp The other records that maybe of help are the Rate Books available at the local studies during the archives closure. The message board at www.sheffieldindexers.com is more active nowadays than this one. Kind Regards Angela Treweek