Answered for Greenfield, Hancock County.
Greenfield was not one of the 23 communities in the Indiana DNR street tree sample, so there is no published species breakdown — the honest picture is a two-tier canopy: mature shade trees dating to the historic district's roughly 1880-1947 build-out over those streets and Riley Park, versus small suburban stock in the newer additions. Statewide, Indiana street tree populations run about 18% silver maple and 34% maple overall; Callery pear is common in 1990s-2000s plantings and as of 2026 is still legal to sell in Indiana, with the amendment that would add it to the Terrestrial Plant Rule pending since 2021 — re-check IDNR before advising a customer. That context matters for black walnut: this is the most common removal request that has nothing to do with safety — it is about nuts, stains, and the plants that will not grow under it. Removing a black walnut around Greenfield runs roughly $400–$1,900, and in Greenfield Residential Historic District, Brandywine Village and Fieldstone access is usually what decides where in that range you land.
Greenfield was not one of the 23 communities in the Indiana DNR street tree sample, so there is no published species breakdown — the honest picture is a two-tier canopy: mature shade trees dating to the historic district's roughly 1880-1947 build-out over those streets and Riley Park, versus small suburban stock in the newer additions. Statewide, Indiana street tree populations run about 18% silver maple and 34% maple overall; Callery pear is common in 1990s-2000s plantings and as of 2026 is still legal to sell in Indiana, with the amendment that would add it to the Terrestrial Plant Rule pending since 2021 — re-check IDNR before advising a customer.
Greenfield has a genuinely old core wrapped in new subdivisions. The Greenfield Residential Historic District — 523 contributing buildings on 187 acres, listed on the National Register in 2011 — was built between about 1880 and 1947, so those blocks carry street and yard trees well over a century old, while the Brandywine/US 40 corridor subdivisions are largely 1970s through 2000s with new sections still being added on young nursery stock.
Deep taproot, which is why walnut sits tight in wind and why nursery stock is difficult to move, and why the roots causing problems are generally under the tree rather than out in the drive. The real root issue here is chemical rather than mechanical: juglone concentrates in the roots and lingers in the soil, so a bed that failed under a walnut often keeps failing for a season or more after the tree is gone.
Greenfield has a real tree code — Chapter 97 — but it governs street trees, not your back yard. Under § 97.07 nobody may prune, spray or treat a street tree, or hire someone to, without the city first issuing a right-of-way permit (issued to property owners or certified arborists), and no street tree may be removed without that permit except in an emergency; a City Tree Commission oversees the program and Chapter 97 also sets street tree species, spacing and clearance standards. Those provisions could not be verified against a retrievable copy of the code — confirm with the city before quoting right-of-way work. There is no Greenfield permit requirement for removing a tree on private property, and Indiana has no statewide one.
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Distance measured from Greenfield.