The firm is now in its 65th year of business and has spent the past 23 years at its Arthur Street premises, which is undergoing significant renovations to support the continued expansion of the firm.

Managing partner Chris Guy said: “The investment reflects our success, forward thinking, and commitment to the future of the firm. We are focused on achieving our vision for the firm, which is to be the go-to law firm in Northern Ireland for high value and complex work.

“We are pleased that the renovations will not only support this, but also our ESG targets which will ensure our long-term sustainability and success.”

The firm now employs more than 60 people and is eyeing further expansion.

Senior partner John Kearns said: “We have modified the building to meet the projected growth of the firm, increasing capacity to support the next stage of growth plans.”

Emma Hunt, head of litigation and partner, added: “We have our reception and meeting rooms completed renovated, and the next stage is the renovation of our team areas.”

The reception area is an adaptable space which now facilitates more client and team meeting simultaneously, allowing Mills Selig to work more efficiently. The building is supplied by 3T Power using renewable energy to support the firm’s aim to become carbon neutral.

Anne Skeggs, head of property and partner, said: “It is easy to see that the renovation matches our core values. We are a firm who focuses on exceptional service, we are supportive, positive and we work together as one team.”