Lexcel Accreditation, recognised as the gold star legal quality mark, is awarded by the Law Society to firms that demonstrate the highest standard of client care and practice management.
Don Bird, partner and head of the Family Law Department, said: "We are delighted to receive Lexcel Accreditation, for what is now the sixth year running.
"The inspection process is a rigorous one and standards get tougher each year, but I am pleased to say that we rise to the challenge.
Nicholas Fluck, President of the Law Society of England and Wales, said: "Gaining and maintaining Lexcel is no mean feat. There are many facets of being a Lexcel accredited law firm, including client care. A commitment to customer service in today's evermore competitive legal services market is vital.
"By undergoing the rigorous Lexcel application and assessment process practices can show the positive steps they are taking to help clients in the increasingly diverse, complicated legal services market.
"The scheme is a beacon of quality to clients and potential clients alike."