R-1 lots must be at least 9,000 square feet with 75-foot minimum width. Castle Rock controls buildable area chiefly through minimum yard setbacks rather than a fixed lot-coverage percentage; PD and overlay zones may set specific coverage caps.
CRMC 17.18.040(A)-(B) requires R-1 lots to have a minimum area of 9,000 square feet and a minimum width of 75 feet. Unlike some towns, base R-1 zoning does not state a single maximum lot-coverage percentage; instead, buildable area is limited by the required front (25 ft), rear (25 ft), and side (7 ft) yards, which must remain open and unobstructed. Planned Development (PD) zones and overlay districts can impose specific building-coverage or floor-area ratios (for example, coverage caps in certain overlays), so confirm your parcel's zoning or PD ordinance for any percentage limit.
Exceeding allowed buildable area or encroaching required yards is a zoning violation; the town can deny permits or require correction.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Castle Rock, CO
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 ...
Castle Rock, CO
Colorado's 2024 turf law (SB24-005, amended by HB25-1113) bans nonfunctional and nonfunctional artificial turf on new nonresidential and common-interest proj...
Castle Rock, CO
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 ...
Castle Rock, CO
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 ...
Castle Rock, CO
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 co...
Castle Rock, CO
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 contr...
See how Castle Rock's lot coverage limits rules stack up against other locations.
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