Mortgage Rates in South Boston

As of August 2026, 30-year fixed mortgage rates in the South Boston metro area range from 5.000% to 7.187% APR across credit unions serving Massachusetts. The median rate is 6.500% APR.

To get the best mortgage rate in South Boston: 1) Compare rates from multiple credit unions serving the South Boston metro area, 2) Improve your credit score above 740, 3) Consider paying points upfront for a lower rate, 4) Shop within a 14-day window to minimize credit score impact, 5) Get pre-approved before house hunting.

Yes, credit unions serving South Boston, Massachusetts typically offer lower mortgage rates than traditional banks. Because credit unions are member-owned non-profits, they return savings to members through lower rates and fees. On a $400,000 mortgage, this can save $50,000-$100,000 over 30 years.

For the best mortgage rates in South Boston, aim for a credit score of 740 or higher. Scores between 700-739 qualify for good rates, while 620-699 may face higher rates. Credit unions in Massachusetts have varying requirements, so compare options even with lower scores.

How much house you can afford in South Boston depends on your income, debts, down payment, and current mortgage rates. Most lenders prefer your total housing costs (including taxes and insurance) to be below 28% of gross income. Use current South Boston rates to calculate your maximum affordable home price.