If you are applying on the basis of Long Residency/Private Life established in UK, Owning a property in UK wont have a significant impact but may help showing closer ties to UK.
Page 39 of Guidance - Long Residence - Published for Home Office Staff
"Owning property or a business may support the view that an applicant has shown long term commitment and a connection to the UK. However, on its own, this would not be a significant factor. Factors such as the length of time the individual has owned the business or property, or whether the business is legally operating must be considered. "
https://www.gov.uk/government/uploads/s ... .0_EXT.pdf
I hope it helps.