Angie's List's staff is about to be at least 20 percent leaner than it was at the beginning of the year.

HomeAdvisor is informing hundreds of Angie's List employees that their jobs will be eliminated after its acquisition closes, which could come as soon as Sept. 29. An Angie's List spokeswoman estimated the layoff total at 230, on top of at least 70 sales staff members who were cut earlier this year.

Layoffs won't begin until HomeAdvisor parent company IAC's acquisition of Angie's List is completed. About half of the affected workers will remain in their jobs during a transition period.

"This will not impact customers, and are largely in corporate departments in which there are duplicative roles across HomeAdvisor and Angie’s List," Angie's List said in a statement.

The announcement does not come as a surprise — nor is it likely to be the final round of job cuts at Angie's List. Layoffs have been expected since May when Angie's List agreed to be acquired by IAC in a deal worth more than $500 million.

Nonetheless, downsizing at one of Indianapolis' largest employers is a tough blow for the city's economy and raises questions about the future of Angie's List's sprawling east-side campus.

Angie's List is a business ratings company that started in 1995 by advertising in newspapers and on public radio. It grew to become one of Indianapolis' biggest tech company success stories, amassing a real estate portfolio of at least 25 buildings and leading redevelopment of the city's east side.

The company's campus is bounded by Ohio Street to the north, Highland Avenue to the east, East Washington Street to the south and Pine Street to the west.

Angie's List likely will need much less space as it continues to contract. Angie's List had 1,567 employees as of a Jan. 31 Securities and Exchange Commission filing. But that number has dwindled as Angie's List made staff reductions and employees sought other jobs after the announcement. The company declined to specify how many employees it has.

HomeAdvisor in May pledged that Angie's List will remain in Indianapolis, but the company has yet to elaborate on what its operations will look like.

HomeAdvisor has no plans "at this time" for future layoffs, the company said. HomeAdvisor added that it will work with displaced employees to help them find jobs, a practice that is common during downsizing.

"We appreciate the many contributions our valued employees have made to Angie’s List, and will make every effort — including offering career placement services — to help ensure a smooth transition," the company said.

Call IndyStar reporter James Briggs at (317) 444-6307. Follow him on Twitter: @JamesEBriggs.