You have a valid marriage if you lawfully obtained a marriage license and the marriage license was completed on the day of the ceremony by a proper officiant even if it was not returned to the register of deeds office. The officiant could be charged with a misdemeanor for failing to return the completed license to the register of deeds office.
If you never obtained a marriage license, then you do not have a lawful marriage and equitable distribution laws would not apply.
Assuming you have a valid marriage, then since the home was purchased prior to the marriage but in both names, then the full value of the home at the date of separation is a marital value that is subject to being divided 50/50. You would not be entitled to a dollar-for-dollar reimbursement of the money you spent for renovations.
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