Less than three years since its launch, the boutique practice has been described as "outstanding" by the latest edition of the Legal 500 standings.
Bexley Beaumont is singled out for its capabilities across a range of specialisms, such as commercial litigation, employment, infrastructure (parliamentary) and planning.
Legal 500 suggests that its expertise in commercial litigation and parliamentary agency work makes it one of the "firms to watch".
Chief Executive Karen Bexley said that the recognition was another fillip in a remarkable year, which has seen both dramatic growth in casework and significant personal achievement.
"It is unusual for a firm as young as ours to find itself included in the best known and most respected directories like Legal 500, alongside much bigger and longer established legal brands.
"I think that is due to the quality of the work which our lawyers are responsible for. That's certainly been reflected in the comments provided by our professional peers and clients.
"When we opened our doors, we set ourselves exceptionally high standards, really wanting to make a difference.
"As a result, we have managed to attract some extremely high calibre lawyers from rival firms.
"We have made tremendous strides in the last few months and this ranking reinforces that we have a truly effective team capable of really supporting clients."
The Legal 500 rankings are based on detailed analysis by the company's team of researchers, which is based in part on thousands of interviews with clients and legal peers.
It concluded that Bexley Beaumont was a "progressive, forward-thinking business" which had "expanded rapidly" since its launch.
One individual remarked that: "Bexley Beaumont’s flexibility is the one of the main reasons we work with them. Nothing is ever too much trouble".
Among those singled out for praise were its "first class" employment team who "bring the breadth and depth of experience required to ensure success on any case".
The ranking comes just weeks after Ms Bexley secured election to the Law Society's ruling Council.
She had been one of 27 candidates vying for five seats representing women lawyers on the Council - described as the "collective voice" of the legal profession in England and Wales.
As well as working for clients in a variety of sectors, including retail, leisure and hospitality, pharmaceuticals, logistics, real estate and the public sector, the firm has won a string of prestigious awards.
In March, Bexley Beaumont was chosen ahead of larger and longer-established national rivals in the Business Growth category of the Modern Law Awards, set up to highlight "the successful, dynamic entrepreneurs within our industry".
It was named Start-up of the Year at the Business Masters Awards and was shortlisted for Boutique Law Firm of the Year at last year's British Legal Awards and at The Law Society Excellence in Law Awards.
The firm now boasts 35 lawyers and, in addition to its offices in the City of London, maintains premises in the heart of Manchester's business district.