How Noblesville Handles Landscaping Rules: A Practical Guide

Noblesville maintains 105 local ordinances across all categories, and 8 of those deal specifically with landscaping rules. Here is a breakdown of what the city actually requires, what is prohibited, and where Noblesville falls on the strict-to-permissive spectrum compared to other cities.

Grass Height Limits

Per Noblesville Code of Ordinances § 93.05 (Weeds, Grass and Debris), grass — excluding ornamental grass — shall not exceed six (6) inches in height, and any plant exceeding six inches is defined as a 'weed.' Every owner of real estate located within the City, or the tenant residing thereon, must cut high weeds and grass and remove debris and rubbish within five (5) days after receiving written notice from the Planning Department. Owners are also responsible for the area between the street and sidewalk adjacent to their real estate.

Key details: Max Height: 6 inches (grass and weeds). Authority: Noblesville Code § 93.05 (Weeds, Grass and Debris). Ornamental Grass: Expressly excluded from the 6-inch cap. Cure Period: 5 days from written notice (Planning Department). Tree Lawn: Owner must maintain strip between street and sidewalk.

Failure to mow grass below six inches or remove debris within five (5) days of written notice from the Planning Department triggers City abatement under § 93.05: the City or its contractor enters the property, mows/removes debris, and bills the owner. General penalties under § 93.99 apply per occurrence and per day. Repeat violators face escalating notices and may have the cost of mowing attached as a lien against the property under Indiana abatement procedures.

Weed Ordinances

Per Noblesville Code § 93.05, a 'weed' is defined as any plant — excluding ornamental grass — exceeding six (6) inches in height. Property owners and tenants must cut high weeds and remove debris within five (5) days of written notice from the Planning Department. The ordinance applies city-wide, including the area between street and sidewalk adjacent to the property. Indiana DNR also enforces 312 IAC 18-3-25, which designates 44 species as prohibited invasive terrestrial plants and bans their sale, gift, transport, or introduction in Indiana.

Key details: Local Definition: Any plant > 6 inches (excluding ornamental grass) = weed. Cure Period: 5 days from Planning Department notice. Authority — Local: Noblesville Code §§ 93.05, 93.07, 93.99. State Prohibited List: 312 IAC 18-3-25 — 44 invasive species banned. State Rule Effective: April 18, 2019 (full sale ban April 18, 2020).

Violations of § 93.05 — not cutting weeds above 6 inches or not removing debris within 5 days of notice — trigger City abatement (entry, cut, bill the owner) and per-day penalties under § 93.99. Costs may attach as a property lien. Possessing, selling, or transporting any of the 44 prohibited species under 312 IAC 18-3-25 may trigger civil penalties from the Indiana DNR Division of Entomology and Plant Pathology and stop-sale orders for nurseries and landscape contractors.

Tree Removal & Heritage Trees

Per Noblesville UDC § 159.083 (Preservation of Existing Natural Features) and § 159.183, clearance of trees and vegetation during the land development process is limited to that necessary for and directly related to the construction of improvements specifically authorized by the improvement location permit. No trees may be removed from a development — nor any change of grade affected — until the primary plat is approved. Removal of any street tree or tree on City property requires an Urban Forester permit under Code Chapter 97. Tree removal on a fully private lot outside development review is generally permitted without a City permit.

Key details: Land Development: UDC § 159.083 — no removal/grading until primary plat approved. Clearance Limit: Only what is necessary for authorized improvements (§ 159.183). Tree Preservation Plan: Required — all trees ≥ 6-inch diameter inventoried. Street/Public Trees: Urban Forester permit required (Ch. 97). Private Lot (Not in Development): Generally no City permit required.

Removing a tree from a development site without an approved primary plat, removing a tree designated for retention on a Tree Preservation Plan, or clearing beyond what is authorized by the improvement location permit, violates UDC § 159.083 / § 159.183 and stops issuance of further permits. Removing a street tree or tree on City property without an Urban Forester permit violates Chapter 97 with penalties under § 97.99 plus restitution at the appraised value. Damaging or cutting timber on a neighbor's land exposes the actor to treble (3x) damages under IC 25-36.5 and Indiana common law.

Artificial Turf

Noblesville's UDC and Code of Ordinances contain no explicit ban on, nor minimum or maximum coverage limit for, artificial or synthetic turf in residential yards. UDC § 159.186 (Landscape Buffer Yards) specifies that areas in regulated buffer yards 'not planted with trees or shrubs shall be maintained as turf or other groundcover approved by the Director of Planning and Development' — meaning the Director has discretion to approve artificial turf as ground cover in non-residential landscape buffer applications. Residential homeowners installing synthetic lawn on private property do not need a City permit. HOA covenants may impose additional restrictions.

Key details: Residential Yards: Not explicitly regulated by City code. City Permit: None required for residential synthetic turf. Buffer Yards: Director of Planning may approve as groundcover (§ 159.186). Cannot Substitute: Required trees/shrubs under § 159.183 must be living plants. Stormwater: MS4 ordinance still applies — no concentrated runoff.

Because artificial turf is not explicitly prohibited in residential applications, there are typically no City violations for installing synthetic lawn on a private home lot. Violations may arise if: (a) the install creates stormwater discharge problems violating the City's MS4 stormwater ordinance, (b) the install is used to satisfy required tree/shrub landscape credit on a development plan in violation of § 159.183, or (c) HOA covenants prohibit it (private enforcement). Buffer-yard groundcover installations of synthetic turf without Director of Planning and Development approval would violate § 159.186.

Noblesville is more permissive than most cities when it comes to artificial turf. That said, there are still limits.

Tree Trimming

Noblesville is a Tree City USA community (35+ consecutive years — longest streak in Hamilton County). Under Code Chapter 97 (Street Trees) and § 97.12 (Regular Tree Care), routine care of street trees in the right-of-way by an owner-occupant — watering, raking, leaf/twig cleanup — does NOT require a permit. However, any certified arborist hired to perform routine street tree care must first secure a permit from the City's Urban Forester. Owner-occupant trimming beyond basic maintenance also requires Urban Forester approval. All work must follow the Arboricultural Specifications Manual (January 2024) and Ordinance 8-3-09.

Key details: Authority: Code Ch. 97 (Street Trees) + Ordinance 8-3-09. Owner-Occupant Routine Care: No permit (watering, raking, debris). Hired Arborist: Must secure permit from Urban Forester first. Beyond Routine Trimming: Urban Forester approval required. Standards: Arboricultural Specifications Manual (January 2024).

Performing street tree work as a certified arborist without an Urban Forester permit, or owner-occupant trimming beyond basic routine care without Urban Forester approval, violates § 97.12 and Ordinance 8-3-09. Penalties are imposed under § 97.99 (Chapter 97 general penalty). Damage to a City street tree may trigger restitution at the appraised value of the tree under the Arboricultural Specifications Manual. Negligent or willful damage to another's standing timber may also trigger treble damages under IC 25-36.5 (Timber Buyers) and related civil liability.

Water Restrictions

Drinking water in Noblesville is supplied by Indiana American Water (INAW) — Noblesville Operations (PWS ID IN5229015), serving approximately 41,078 residents from three well fields drawing groundwater from Hamilton County aquifers. The City does NOT operate its own potable water utility (Noblesville Utilities Department handles wastewater/sewer only). When drought conditions arise in central Indiana, INAW imposes mandatory outdoor watering restrictions — typically alternate-day watering or 2-days-per-week mandatory limits — under its Water Conservation Ordinance. Noblesville does not have a standing year-round outdoor watering schedule.

Key details: Water Utility: Indiana American Water — Noblesville Operations (PWS IN5229015). Source: Groundwater — 12 wells across 3 Hamilton County well fields. City Utility: Wastewater/sewer only (no City-owned drinking water). Year-Round Schedule: None — restrictions are drought-triggered by INAW. Moderate Drought: Voluntary + mandatory 2-days/week irrigation.

Violations of an active Indiana American Water mandatory drought restriction (e.g., watering on the wrong day during alternate-day restrictions) may result in service warnings, fines per the utility's tariff, and — under prolonged severe drought — service curtailment. INAW publishes alerts at amwater.com/inaw/alerts. There are no Noblesville municipal penalties for outdoor watering outside of an INAW restriction period.

Rainwater Harvesting

Rainwater harvesting is fully legal in Indiana with no statewide restriction on residential rainwater collection. Noblesville recognizes 'rain barrel' as a defined feature ('a container that collects rainwater managing rooftop runoff') in its zoning ordinance. The City does not require a permit for typical residential rain barrels used for outdoor irrigation (gardens, lawns). Complex systems involving large cistern storage, alterations to potable plumbing, or non-potable indoor connections may require building/plumbing permits under the Indiana Plumbing Code. The Hamilton County Soil & Water Conservation District (based in Noblesville) sells low-cost rain barrels.

Key details: Indiana Statewide: Rainwater collection is fully legal; no restrictions. Noblesville UDC: 'Rain barrel' is a defined term in the zoning ordinance. Residential Rain Barrel: No City permit required. Large Cisterns/Indoor Plumbing: Indiana Plumbing Code (675 IAC 16) permits may apply. Cross-Connection: Strictly prohibited with potable supply.

Standard residential rain barrels: no violations possible since no permit is required and the practice is legal statewide. Larger cisterns installed without required Indiana Plumbing Code permits or without cross-connection protection (where plumbed indoors) may face Building Department citations. Any cross-connection between a rainwater system and the Indiana American Water potable service is prohibited under the utility's tariff and the State Plumbing Code, and may trigger immediate service shutoff.

Noblesville is more permissive than most cities when it comes to rainwater harvesting. That said, there are still limits.

Native Plants

Noblesville encourages plant material 'normally grown in Central Indiana' that is 'capable of withstanding the extremes of individual site microclimates' under UDC § 159.183. Native plants are strongly supported by City Forestry and the Tree Board. Under Indiana DNR's Terrestrial Plant Rule (312 IAC 18-3-25, effective April 18, 2019), 44 invasive plant species are designated pests and are prohibited from sale, gift, barter, exchange, distribution, transport, or introduction anywhere in Indiana — including in Noblesville landscapes. The list includes Bradford/Callery pear, burning bush, autumn olive, Japanese honeysuckle, multiflora rose, common buckthorn, and tree of heaven.

Key details: Local Standard: UDC § 159.183 — species 'normally grown in Central Indiana'. Quality: Good quality, disease- and pest-free at planting. State Prohibited List: 44 species under 312 IAC 18-3-25. Rule Effective: April 18, 2019 (sale ban April 18, 2020). Authority: IC 14-24 — Indiana DNR Division of Entomology and Plant Pathology.

Selling, gifting, transporting, or planting any of the 44 listed invasive plants violates 312 IAC 18-3-25 and exposes the violator to enforcement by the Indiana DNR Division of Entomology and Plant Pathology — stop-sale orders for nurseries, civil penalties, and disposal orders. Landscape contractors who install banned species can be held liable. Existing plants in a homeowner's yard are not retroactively criminalized, but you cannot propagate, share, or move them. Violations of UDC § 159.183 plant-quality standards on a development site can block certificate of occupancy and forfeit the surety bond.

The Bottom Line

Compared to many U.S. cities, Noblesville gives residents more room on landscaping rules. 2 of the 8 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

All of the above reflects Noblesville's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.