Colorado ADU Law Opens Door for Douglas County Homeowners in 2026
State law HB24-1152 removes barriers to accessory dwelling units in Castle Rock, Parker, Highlands Ranch, and Lone Tree.
A new Colorado state law is reshaping housing options for homeowners across Douglas County, with one local builder arguing that the 2026-2027 building season represents an unusually favorable window for those considering accessory dwelling units on their properties.
HB24-1152, the legislation at the center of the opportunity, eliminates longstanding regulatory obstacles that previously made it difficult or impractical for homeowners in communities such as Castle Rock, Parker, Highlands Ranch, and Lone Tree to add secondary dwelling structures to their lots. The law's implementation effectively opens a path that was largely closed to many suburban homeowners under prior local zoning frameworks.
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Limestone Custom Homes, a design-build firm headquartered in Castle Rock, is positioning itself to help Douglas County residents take advantage of the changed legal landscape. The company's public statement frames the current moment as particularly well-timed, suggesting that acting during the 2026-2027 season allows homeowners to move ahead of what could be increased demand and competition for contractors as awareness of the new law spreads.
Accessory dwelling units — self-contained living spaces built on the same parcel as a primary residence — have gained attention nationally as a lower-cost strategy for adding housing supply in high-demand suburban markets. For individual homeowners, ADUs can serve multiple purposes, including housing for family members, rental income generation, or flexible live-work arrangements. Colorado's legislative move aligns the state with a broader trend of states pre-empting local zoning restrictions to encourage ADU construction.
The practical implications for Douglas County residents hinge on local permitting processes and individual property characteristics, factors that vary by municipality even under the new state framework. Continue reading at All Financial Services & Investing.
