Need legal advice from your attorney from small town Iowa. My boyfriend and I have been together 9 years and 8 years since I bought a house under my name. Almost immediately he wanted a shop to fix it up, so he built a 32" by 48" building behind the house in my backyard. He built it himself and used his own money. He built a huge fence in the area for our dogs. A couple of years ago he built a 12" x 22" on our deck plus house that we use as a second TV room/living room. He did the work and paid for the materials. These three main projects that he just helped work on but were funded by him. We are now parting and I am selling the house and the property. The house is huge 5 bedrooms, 2.5 bathrooms, plenty of home for me. He owns a property across the street, and is building a larger store with living in the area for it. I don't want to live across the street from him. He wants to return with the $$$ listed in the screenshot. I think it's only fair that when he sells the property, I give him the money in the extra square feet, the added value of the house, not some number in his head. I think the fenced in yard is trivial. I want him to get the additional value that his shop brings when it is sold, but it is on land that I own, so how do you determine this amount? My idea is just to sell the plot of land in his store (he wants me to give it only to him), then let him sell it and either sell the building on his own or keep it. He can't decide whether his building will help or slow the sale. Which is then our cost to clear and break that side/back of my property. The back half of the lot he mentioned is half of the 170" x 50" piece that my detached garage sits on the front half. what would you do ?