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Thornton, CO Landscaping Rules: Native Plants (2026)

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

Summary

Thornton may encourage or require native and drought-tolerant landscaping. Some areas restrict traditional grass lawns in favor of water-efficient alternatives.

Bill Summary: Under current law, a unit owners' association (association) of a common interest community may not prohibit the use of xeriscape, nonvegetative turf grass, or drought-tolerant vegetative landscapes to provide ground covering to property for which a unit owner is responsible. There is, however, an exception authorizing an association to adopt and enforce design or aesthetic guidelines or rules that apply to nonvegetative turf grass and drought-tolerant vegetative landscapes or to regulate the type, number, and placement of drought-tolerant plantings and hardscapes that may be installed on a unit owner's property, on a limited common element, or on other property for which the unit owner is responsible.

Source: Municode Library - ThorntonView official code

Full Breakdown

Thornton increasingly supports native plant landscaping and xeriscaping for water conservation and habitat restoration. Some jurisdictions offer rebates for lawn replacement with drought-tolerant plants. HOAs in many states can no longer prohibit xeriscaping or native plant gardens. Municipal water restrictions may effectively require low-water landscaping for new developments. Native plant lists are typically available from local cooperative extension offices. Invasive species removal may be required or incentivized.

Frequently Asked Questions

Can my HOA force me to keep a grass lawn?
Many states prohibit HOAs from banning xeriscaping or native plant gardens. Check your state laws and Thornton ordinances.
Are there rebates for replacing my lawn?
Thornton or your water utility may offer rebates for lawn replacement with drought-tolerant landscaping. Contact your local water provider.

Sources & Official References

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