SAN FRANCISCO — Walnut Creek real estate and business law firm Morgan Miller Blair is closing next month, with its name partners retiring and the rest of its attorneys splintering off to form smaller boutiques. A few are joining bigger firms.

Morgan Miller, founded in 1985, has been known for its deep ties to California publicly traded homebuilders. That practice has not bounced back with the real estate market still stuck in a rut. Under partner Christopher Hunter, who took over as chairman this past January, Morgan Miller made aggressive efforts to drum up business, got creative with fee structures and took on more contingency matters. Hunter said the firm continued to make money, but revenues have been flat.