A Pennsylvania Fixed Rate Jumbo Mortgage is a Loan > $484,350 with rates that do not fluctuate.. A typical Pennsylvania Fixed Rate Jumbo Mortgage has higher rates than conforming loans < $484,350. We work with wholesale lenders to offer a competitive Pennsylvania Fixed Rate Jumbo Mortgage. Some are portfolio lenders, who will service their own Pennsylvania Fixed Rate Jumbo Mortgage, thus we can offer the most competitive market rates for a Pennsylvania Fixed Rate Jumbo Mortgage.