A root adds diameter every year and concrete does not move aside, so it comes down to which is stronger, and a live structural root beats four inches of unreinforced slab. This is a property-damage and trip-hazard problem, not a tree-failure problem, and the tree is usually in good health. The important inversion is that the repair is what creates the hazard: the roots lifting your driveway are the buttress roots on one side of the trunk, and cutting them is precisely how a stable tree becomes an unstable one. In Greenwood — Old Town Greenwood, Green Valley and Imperial Hills included, that's normally a tree removal job at $400–$1,900. Not urgent.
Why this comes up in Greenwood
Greenwood is split between Duke Energy Indiana and Johnson County REMC (JCREMC). That split matters: the IURC's tree-trimming rules (170 IAC 4-9, from Cause No. 43663) bind only investor-owned utilities like Duke — two weeks' notice, no removing more than 25% of your tree and no topping without your permission, debris cleared within three days. JCREMC is a member-owned cooperative and is not covered by those rules; it runs its own trim rotation.
Greenwood's canopy
Two separate canopies in one city. The pre-1960 blocks around Old Town and near County Line Road hold Greenwood's only genuinely mature shade trees — just 9% of the housing stock predates 1960 — while the subdivisions east of I-65 are 2000s-era plantings still small enough to prune off a ladder. Ash is functionally gone: emerald ash borer has been confirmed in Indiana since April 2004 and is now in all 92 counties.
Johnson County rules
No permit is required to remove a tree on private property in Greenwood. Tree rules in the city code are all about new development and the public way: the UDO's landscaping standards require street trees along frontage and give credit for preserving existing large-caliper trees, separate provisions restrict planting in the public way, and the Stormwater Department's Easement Encroachment Permit is required before planting any tree or shrub inside an existing drainage or utility easement. The specific UDO section numbers and planting ratios could not be verified against the live code — confirm with Planning and the Stormwater Department. Cutting down your own backyard tree needs nothing.
The tree lawn in Greenwood
The strip between sidewalk and street is public right-of-way. Greenwood's UDO governs where required street trees are placed relative to the curb and sidewalk, but that placement rule could not be confirmed against the live code, so check with the Planning Department before assuming a given curb-strip tree is the city's problem or yours. One exception worth knowing: County Line Road, Greenwood's northern boundary, is under the control of the City of Indianapolis, not Greenwood, per the city's own comprehensive plan.