Jumbo Loan Definition Texas texas jumbo home loans & Mortgages | Lone Star Financing – Texas Jumbo Home Loans. A jumbo mortgage is a home loan with an amount that exceeds conforming loan limits imposed by Fannie Mae and Freddie Mac. In Texas, that value is $424,100. Texas Jumbo Home Loans have no PMI (private mortgage insurance), so the down payments are larger and the credit score requirements are typically no lower than 700.Conventional Loan Guidelines 2019 – MyMortgageInsider.com – Conventional Loan Guidelines 2019 2019 conventional loan limits. The conventional loan limit for 2019 is $484,350 for a single family home. Though, Fannie Mae and Freddie Mac have designated high-cost areas where limits are higher. For example, a single-family home in Seattle, Washington could have a maximum loan of $592,250.