How Deep a Longview Stump Grind Has to Go
Sod and Lawn: Six to Eight Inches
Turf roots occupy only the top few inches of soil, so grass needs surprisingly little clearance. Taking the stump six to eight inches below grade leaves enough clean depth for topsoil and sod to establish without hitting wood. This is the cheapest setting and covers the majority of residential jobs, which is why it is quoted as the default when nobody specifies otherwise.
Hardscape: Twelve to Eighteen Inches, and the Roots Too
Anything you pour or lay over the spot sits on ground that must not move. Wood left underneath will decay over several years and the surface above it will drop, cracking a slab or dishing a paver field. For a patio, a shed pad or a driveway extension, the grind goes deeper and the major structural roots radiating from the stump are chased and removed as well.
Replanting: Deeper Still, and Wider
A new tree needs a volume of real soil to establish in, not a pocket of decomposing chips. Planting into a ground stump hole is the single most common reason a replacement tree sulks for three seasons. If a tree is going back in the same spot, expect the deepest grind, a generous width, and the hole refilled with imported soil rather than the material that came out.
Why Depth Is Not Free
A grinder removes wood in horizontal sweeps, so doubling the depth roughly doubles the passes and the wear on the teeth. It also multiplies the volume of grindings you are left standing next to. Operators price depth accordingly, and quoting the shallow figure while assuming the shallow use is how a misunderstanding starts.
Say the End Use Out Loud
The only reliable way to get the right depth is to tell the crew what the ground is for before they start, not after the machine is loaded. Changing the answer afterwards means a return visit, a second mobilization charge, and a stump hole that has already been backfilled once.