Southern Development Council, Inc. Share: Banks & Credit Unions Southern Development Council, Inc. Visit Website 200 Office Park Drive Suite 215 Mountain Brook, AL 35223 (334) 244-1801 About Map About A U.S. Small Business Administration Certified Development Company (CDC) founded in 1983 as a non-profit to make loans to busineeses. Endorsed by Alabama Bankers Association. What's Nearby? Distance: 5 10 15 20 25 50 mi.