There is a fee payable for looking at the records - you could come to RoS in person and see what more info we have - we have offices in Edinburgh and Glasgow. Or you could write in with your request. We might have records of the specific property your ancestor was born in, so the more info you have, the better. Then again, if your ancestor just rented the property, there might not be any property deeds in their name.
For more info, go to
www.ros.gov.uk.
Another plalce to try would be online maps from that period.
Hope this is helpful