I didn't marry till I was 37 and I think I may have made a big mistake.

I bought and paid for a house to be built on land I purchased before marriage.

90% of the funds to purchase and build were mine before marriage that I can prove.

Do I have a valid claim for a separate property of 90% of the sale of the house in a divorce court?

I will try to negotiate this with my husband and file for divorce by mutual consent using this resource https://onlinedivorcer.com/online-divorce-washington-dc.

But I'm not sure if I can do it. Therefore, I would like to prepare in advance for other options for solving this problem.