Customer data cleansing via telephone contact

I have lists of persons who have applied for planning permission to build a Home Conservatory in Northern Ireland. What I need is telephone contact with these persons to ascertain if they have a Glass Conservatory. Simple question- Do you have a Home Conservatory with a Glass Roof? yes or no. I am based in Four Winds-Belfast BT8. This will help me to cleanse my newly purchased data. I promote a unique internal Conservatory Insulation system. I may also have additional work as my Colleague in Middlesborough purchased similiar information-again requiring the same a question and answer.We need to ascertain our potential client base for a further follow up.Thanks Michael.