I purchased a home in Marion county (Summerfield) in September 2018. I was not provided with a blue print of the home from the previous owner. Would I be able to obtain a blue print of my home from your office?

If the house was built less than 10 years ago the Marion County Building Department should have on file the plans as permitted. ..... D.B

You might be able to if you provide proof of ownership. Chances are there will be a few involved. The previous owner probably did not have a blueprint to give you. Those are generally provided only if it was a custom built home where the home buyer pays for the blueprint. When it's something like a rubber stamp (spec) house the plans are proprietary. What do you need them for? Depending on need you might be able to get the information a cheaper route (e.g., if it was a spec home there could be a brochure from the builder for your house model that would have basic measurements).