Castle Pines approves emergency code change, reviews growth and road projects

Castle Pines moved immediately to amend its municipal code, adopting Ordinance No. 26-05 as an emergency measure on April 7 so the city could update rules tied to prepetition procedures and title setting without waiting for the usual ordinance timeline.

That same meeting also showed how closely day-to-day city administration is tied to bigger growth and transportation decisions. The council’s study session covered photo radar speed enforcement, the history of Parks and Recreation funding, the I-25 and Happy Canyon Road interchange project, and the 2026 Three-Mile Plan. Castle Pines says study sessions are informational and do not include public comment or formal votes, but the topics underscored what residents are likely to feel next: traffic enforcement, road capacity, and how quickly development can move.

The most visible infrastructure issue remains the Happy Canyon Road and Interstate 25 interchange. Castle Pines says Douglas County initiated the project in 2015, and the effort has since been folded into the county’s 2040 Transportation Master Plan and 5-Year Capital Improvement Program. The preferred concept under review is a diverging diamond interchange, being evaluated with Douglas County, the Colorado Department of Transportation and the Federal Highway Administration.

For commuters, the timing matters. Castle Pines says future construction is expected to begin in late 2026 or 2027, depending on funding from Douglas County and other partners. That funding picture improved in December 2025, when Douglas County agreed to voluntarily contribute an additional $500,000 for preconstruction and design work. The city has also said approvals for nearby development have been tied to interchange improvements, making the project a key gatekeeper for future growth around the corridor.

Castle Pines voters approved a one-percent sales and use tax increase in November 2023 to pay for roadway repairs, maintenance and capital improvements on the city roadway system. That money has already helped move projects forward. The city completed the Happy Canyon Road and Lagae Road roundabout in 2024 as an early piece of the future interchange work, then finished eastbound Castle Pines Parkway reconstruction and Monarch Boulevard improvements in 2025.

The 2026 Three-Mile Plan was also already in motion before the council discussion, with the Castle Pines Planning Commission reviewing it in February and public hearing notice issued in March. Taken together, the emergency ordinance and the infrastructure updates point to the same reality in Castle Pines: the city is trying to keep its code, roads and land-use rules moving in step as development pressure and regional traffic continue to build.