My five year relationship just ended and we were not married. My ex-partner had the house prior to us meeting and the house is in his name only. While living there I installed a salt water swimming pool for us. The loan for the swimming pool is solely in my name since I made considerably more money and have a much better credit rating. There is still $10,000 of the $30,000 loan balance remaining. Do I have any legal recourse? As it stands, I will be paying $400 a month for the next 2 years for a swimming pool at my ex-partner's house. Thanks for any insight...

Was this an inground pool? If not, take it down. If it is. I'm not sure you have any recourse. Anytime you make improvements to property you don't own, you take a risk. You can try suing him for the balance of the loan, but I doubt if that is going to fly.

Was there any agreement when you put the pool in, that he pay 1/2 or any part of it.

If it is part of the house, it now belongs with the house. This is one of the risks of living together without marriage. Or buying large items without legal agreement

I'm sure a 30K pool is inground. It isn't 'personal property' as your title asks. It is now a fixture of the homeowner's real estate. You have no recourse (other than defaulting on the loan).