Anonymous wrote:About $15-$20 a linear foot plus $150 per pop-up drain (or similar termination drain) for each downspout extended. About $1500 minimum for the job. A bit more if it requires trenching through any roots, tunneling under or through any sidewalks.
Ours was in this range (I think around $1200) and included 2 pop up drains. The company pouring our driveway actually did it after pulling up the old driveway and before putting down the new. It needed to be done anyway, but his particular concern was avoiding a drainage flow over the new circle drive that would eventually discolor it.