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Chattanooga, TN Landscaping Rules: Native Plants (2026)

Light Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

General height limit
10 inches, grass/weeds/underbrush
Exemption program
RainSmart Yards / RainSmart Rewards
Exemption condition
Must meet program maintenance requirements
Enforcement
City abates and bills owner, Sec. 21-137
Emergency exception
No citation during declared disaster

Summary

Chattanooga generally requires grass and weeds kept under 10 inches, but Sec. 21-136(d) exempts City approved RainSmart Yards and projects approved through the RainSmart Rewards program that adhere to the program's maintenance requirements, giving certified native-plant and rain-garden landscaping a path around the standard overgrowth ordinance.

(a)All Premises and exterior property shall be maintained free from grass, weeds or underbrush in excess of ten (10) inches. All noxious weeds shall be prohibited. Bushes, shrubs, vines, groundcover and decorative landscaping shall be properly maintained. (d)City approved RainSmart Yards and projects approved through the RainSmart Rewards program that adhere to the program's maintenance requirements shall be exempt from the provisions of this ordinance.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 40 Update 1).

Full Breakdown

Sec. 21-136(a), the City's overgrowth standard, requires that all Premises and exterior property shall be maintained free from grass, weeds or underbrush in excess of ten (10) inches, bans noxious weeds outright, and requires that bushes, shrubs, vines, groundcover and decorative landscaping shall be properly maintained. A violation is prosecutable, and under Sec. 21-136(b) the City can send its own crew or a hired contractor onto the property to cut and remove the overgrowth, then bill the owner for the cost plus administrative fees.

Sec. 21-136(d) then carves out the exemption relevant to native and managed-natural landscaping: City approved RainSmart Yards and projects approved through the RainSmart Rewards program that adhere to the program's maintenance requirements shall be exempt from the provisions of this ordinance. That means a property owner who enrolls a yard in the City's RainSmart Rewards program and keeps it within that program's own maintenance standards does not have to keep the planted area under the 10-inch height limit, a meaningful allowance for native meadow plantings, pollinator gardens and stormwater-absorbing rain gardens that are meant to grow taller and denser than turf grass.

Sec. 21-136(c) adds a separate, unrelated exemption: the City cannot issue an overgrowth citation during a Mayor-declared natural disaster emergency in the affected location. Enforcement otherwise runs through the Code Official under Sec. 21-137, which requires written notice, a chance to remedy the violation, and a right to a hearing in City Court before the City abates the overgrowth and assesses the cost as a lien against the property.

Violations & Fines

Growing regular grass, weeds or underbrush over 10 inches without RainSmart Yards or RainSmart Rewards approval is prosecutable under Sec. 21-136(b), and the City can enter the property to cut the growth and bill the owner for the cost plus administrative fees. Sec. 21-137 requires the Code Official to give written notice and a chance to remedy the violation, with abatement costs becoming a lien on the property if the owner does not comply within ten days.

Frequently Asked Questions

Can I let native plants grow taller than 10 inches in Chattanooga?
Only if the planting is enrolled and approved under the City's RainSmart Yards or RainSmart Rewards program. Sec. 21-136(d) exempts those approved projects from the ordinary 10-inch grass and weed height limit, as long as the yard keeps meeting the program's own maintenance requirements.
What happens if my yard exceeds the height limit without RainSmart approval?
Sec. 21-136(b) makes the violation prosecutable and lets the City send its own crew or a hired contractor to cut and remove the overgrowth, then assess the cost plus administrative fees against the owner, after the notice and hearing process in Sec. 21-137.
Does the noxious weed ban apply even in a RainSmart yard?
Sec. 21-136(a) prohibits noxious weeds outright as a separate clause from the height limit, and Sec. 21-136(d) only exempts RainSmart-approved projects from the provisions of this ordinance while they meet the program's maintenance requirements, so an unmaintained or non-compliant planting can still lose its exemption.

Sources & Official References

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