Hi Dave
you do not give a time line but the Tithes give townlands and Griffiths Valuation gives head of house and there is a map which can be manipulated to the present day, Grifiths Valuation was done in about 1851 and this site has various icons, you can see plot number in one adn then find on the old map in another icon, this map can be drawn using bar to a modern map, http://www.askaboutireland.ie/griffith-valuation/index.xml?action=nameS… You can search by name or area. All maps are available here https://www.osi.ie/
The townlands can be seen on maps here but not buildings https://www.townlands.ie/ If they were involved in business they amy be in a trade directory or look up the local studies in Cork County Library.
Include names and dates and if you can insert query in the parish online or use the chronicles it may elicit more info. I am not local and assume if there is a volunteer they will pick up the query if you enter under the parish name.
If there is a post 1864 record of a BMD the addess will be included but may only be a townland so you need someone who knows the area to locate the actual house.
Regards
Pat