Landscaping Rules in Castle Rock, CO (2026)
9 verified landscaping rules for Castle Rock, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Castle Rock caps grass and weed height at 12 inches. Properties may not be overgrown, and the Town's Municipal Code (Title 8, Chapter 8.12) makes the property owner responsible for keeping grass and weeds trimmed year-round.
Grass and Weed Height Limit in Castle Rock
Some RestrictionsCastle Rock Municipal Code 8.12.030
Properties may not be overgrown with grass or weeds exceeding 12 inches in height.
Tree Trimming
Castle Rock requires all plants and trees be trimmed so they do not impair driver vision or obstruct travel on sidewalks or roadways. Property owners must keep vegetation clear of the public right-of-way and sight lines.
Tree and Plant Trimming Rules in Castle Rock
Some RestrictionsCastle Rock Municipal Code (residential property maintenance)
All plants and trees are to be trimmed so they do not impair driver vision or obstruct travel on sidewalks or roadways.
Tree Removal & Heritage Trees
In most cases the Town of Castle Rock does not require a permit to remove a tree on your own private residential property. Trees in the public right-of-way are a different matter and cannot be removed without Town or County permission.
Removing a Tree in Castle Rock, Colorado
Some RestrictionsWeed Ordinances
Castle Rock's Municipal Code limits weed height to 12 inches and, together with the Colorado Noxious Weed Act (CRS 35-5.5), requires property owners to control noxious weeds on their land. Owners manage weeds by mowing, spraying, pulling, or native landscaping.
Weed and Noxious Weed Control in Castle Rock
Some RestrictionsCastle Rock Municipal Code 8.12; CRS 35-5.5 (Colorado Noxious Weed Act)
The Municipal Code limits growth of weed height to 12 inches or less... [residents are] required by both Town Municipal Code and state statute, to control noxious weeds on their property.
Water Restrictions
Castle Rock Water restricts residential lawn irrigation to every third day, before 8 a.m. or after 8 p.m., from May 1 through Sept. 30. Your watering days come from a square, circle, or diamond symbol set by the last digit of your address.
Castle Rock Water Irrigation-Day Restrictions
Some RestrictionsCastle Rock Municipal Code Ch. 13.15 (Water Restrictions); Castle Rock Water schedule
Residential watering is permitted every third day before 8 a.m. or after 8 p.m. on your designated watering day. ... May 1 through Sept. 30. ... All water customers are assigned a square, circle or diamond, identified by the last number of the street address.
Rainwater Harvesting
Colorado law lets Castle Rock residents collect rooftop rainwater in up to two rain barrels holding a combined 110 gallons, with no permit required. Barrels are allowed at single-family homes and multi-family buildings of four or fewer units.
Rain Barrels in Castle Rock, Colorado
Some RestrictionsCRS 37-96.5-103 (HB 16-1005)
No permit or other approval is required for capture and use of precipitation in rain barrels with a combined storage capacity of 110 gallons in accordance with Section 37-96.5-103, C.R.S.
Native Plants
Colorado law protects a homeowner's right to install water-wise and native landscaping. Under SB23-178, HOAs cannot ban drought-tolerant xeriscape or native plants, and Castle Rock Water actively encourages low-water native landscaping.
Native and Water-Wise Landscaping in Castle Rock
Some RestrictionsArtificial Turf
Colorado's 2024 turf law (SB24-005, amended by HB25-1113) bans nonfunctional and nonfunctional artificial turf on new nonresidential and common-interest projects starting Jan. 1, 2026. It does not restrict artificial turf on existing or new single-family residential lots.
Artificial Turf Rules in Castle Rock, Colorado
Some RestrictionsComposting
Backyard composting is allowed in Castle Rock with no Town permit; residents just avoid meat, dairy, and oily foods that attract pests. Yard waste can go to the free Douglas County Slash-Mulch Program, seasonal Town collection events, or a private curbside compost service.
Composting and Yard Waste in Castle Rock
Some RestrictionsLooking for Douglas County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Castle Rock city rules.
Landscaping Rules in Douglas County →