Castle Pines drafts annexation policy to guide future growth decisions

Castle Pines put its annexation process on hold after the Crowsnest proposal was withdrawn, giving city leaders 120 days to write clearer rules before the next land request arrives. The pause is meant to turn annexation from a one-off political fight into a more deliberate growth decision.

City officials said the push for a policy grew out of the March 2026 City Council retreat, where members asked staff to build a thoughtful and consistent framework for handling annexation questions. The city says it is not considering any annexation applications while that framework is being developed.

The stakes are high in a city that has changed quickly. Castle Pines says its population grew from about 10,500 in 2018 to about 17,500 now, while the city itself says it is home to roughly 16,000 residents. Castle Pines incorporated on February 12, 2008, after voters approved incorporation in November 2007 by about a 4-to-1 margin. Officials now want annexation decisions to fit with the city’s statutorily required three-mile plan and its broader 20-year comprehensive plan.

The Crowsnest case triggered the policy shift. Castle Pines first accepted the annexation petition on January 13, 2026, then moved into the eligibility hearing process under the Municipal Annexation Act of 1965. On February 24, City Council approved a resolution finding the property eligible for annexation, a first-step ruling that did not mean council supported or opposed the project. The annexation was later withdrawn effective March 19, and on March 24 council formally accepted that withdrawal and imposed the stay on future annexation applications.

The Crowsnest site had been described as about 795 acres along Crowfoot Valley Road. Media reports said the project could have brought nearly 4,000 residences and about 70 acres of open space, while another report put the housing total at nearly 3,650 homes. Parker officials had already signaled they did not want the land annexed, underscoring how growth pressure in south metro Denver can spill across city boundaries.

Councilmember Nate Winegar summed up the mood during the annexation debate: “We need to take time with this, we need to make sure we get this right.” Castle Pines staff also prepared an annexation and zoning impact report for the Crowsnest petition under state law, a reminder that annexation affects more than a new boundary line. The city says unincorporated Douglas County property must be annexed before it can be developed within Castle Pines, and annexation also determines city zoning at the time of incorporation.

City officials must now bring back a draft annexation policy within 120 days. For Castle Pines, the message is clear: future growth will still come under pressure, but the city intends to decide its next moves with more control, more structure and less improvisation.