Critics say up-front pricing is risky in a sector where tough negotiations, permit hurdles, municipal demands and unexpected barriers to complex deals could leave the firm on the losing end of such arrangements. But K&L's goal is simple: Avoid situations where cost-conscious clients balk at their bill.

“A cautious client wants to tie down every cost to the extent that he possibly can,” K&L Gates commercial transactions and finance attorney Douglas Stanford said. “Out-of-control fees became a problem. A lot of these clients are now asking for very firm fee caps or fixed-fee proposals in writing. And we are obliging.”