This page spends so many words on tension and root plates for a reason. Every storm season, people who would never fell a standing tree take a chainsaw to a downed one, because down reads as done. It is not. A windthrown trunk holds every pound the storm put into it, and the saw is the release. The professionals' advantage is knowing which side of the wood is loaded — and rigging it off when the answer is unclear.
On a house, the job is bigger than the tree. The removal is sequenced so the structure unloads gradually, tarping follows the same day, and everything is photographed and written down so the claim goes through clean. We have run that sequence with roofers and adjusters since 1997; the coordination is worth as much as the sawing.
And the honest line, plainly: a tree flat on open grass is not an emergency. Nothing about it justifies emergency pricing or a crew pulled off a house job. Companies that bill lawn trees at roof-tree prices are charging you for your own adrenaline. We quote that tree as routine work, and save the urgency — and its pricing — for the calls that earned it.