CohnReznick LLP and Boston-based Ercolini & Company have signed a letter of intent to combine practices. The deal is expected to close on June 30.

The combination more than doubles the size of CohnReznick’s Boston practice, which places the firm among the top 15 in the Boston market.

Ercolini & Company will take on the CohnReznick name, and within the next year, all of Ercolini's employees will move to CohnReznick’s office at One Boston Place.

Ercolini & Company was founded in 1974 and currently has 54 employees and nine partners.

The firm will enhance CohnReznick’s national Affordable Housing and Commercial Real Estate Industry Practices. With additional expertise in higher education, hospitality and other industry sectors, the combination brings new diversification to CohnReznick’s Boston practice.

CohnReznick, which has had a presence in Boston since 2008, has 38 employees and six partners in its Boston office. Its firm-wide resources include dedicated industry practices, specialized assurance, tax and advisory services, and global reach through Nexia International. The firm is also an award-winning workplace for its women’s program, flexibility, dedicated learning and development department, and community service initiatives.