Boehner provided no details of the specific claims to be made in the suit, although Republicans have long accused Obama of selectively enforcing the health care law that bears his name and doing the same with immigration legislation on the books.
In response, White House press secretary Josh Earnest accused congressional Republicans of obstruction and said they had left Obama with little option but to make greater use of his executive authority.
"The fact that they are considering a taxpayer-funded lawsuit against the president of the United States for doing his job, I think, is the kind of step that most Americans wouldn't support," Earnest said.
The suit would be filed on behalf of the House and its mere existence would likely set off a partisan struggle. Three Republicans and two Democrats comprise a bipartisan group charged with overseeing House legal matters.
The group must meet to approve filing a suit on behalf of the House, and a party-line vote is all but certain.
Boehner strongly brushed aside a question of whether impeachment proceedings could result from the suit. "This is not about impeachment. This is about his (Obama's) faithfully executing the laws of our country," he said.
He also rejected a suggestion that the suit was designed to give traditional Republican voters a reason for going to the polls this fall when control of Congress will be at stake.
"This is about defending the institution in which we serve," he said. "What we've seen clearly over the last five years is an effort to erode the power of the legislative branch."