Marimón Abogados increased its revenue by 6 per cent to €8.9 million in 2017.
A firm statement attributed the growth to increases in M&A, real estate and administrative law work.
It added that the firm had increased its staffing levels by 10 per cent and now had 80 professionals, 60 of which are lawyers.
The firm has offices in Madrid, Sevilla and Barcelona.
More than 50 per cent of its clients are Spanish subsidiaries of international firms mainly based in Germany, the US, France, Italy, Portugal and the UK.
Luis Marimón, Marimón Abogados partner and the firm’s managing director, said: “The solid, consistent growth this firm has experienced in the last few years is driving our corporate development, which will translate into new recruits and the upcoming move to new premises in Barcelona in 2018. The new office space in Barcelona will double the current one, which will allow us to grow even more.”