Add topsoil over grass or regrade entirely?
We have a 1/2 acre lot with sad grass. The turf is dented, vole-holed, and uneven. Early in the spring I want to start calling lawn places to have it fixed, but I want to think about my options first.
Complicating any lawn work is a very old, non-functioning sprinkler system attached to an unused well.
So, I'm wondering about the feasibility of each option: 1) rake topsoil over the lawn, filling in the dents and low spots, and overseeding; 2) dig out the old sprinkler system, fill in those trenches, and then do option 1; or 3) dig out, fully regrade, and reseed or sod the whole mess.
Cost is a factor. But I'm also interested in pros/cons. What do you think?