Castle Rock Water Approves Small Rate Increase for Major Upgrades

Castle Rock Water announced small rate increases at the start of 2026 intended to support about $500 million in capital investment over the next 10 years. The utility said the adjustments respond to rising energy, labor and material costs while allowing the town to maintain, repair and upgrade major components of its water and wastewater systems as it works toward a fully renewable water supply.

Under the update, Castle Rock Water estimated the average residential customer would see an increase of roughly $4 per month on bills starting in February 2026, reflecting usage billed for the previous month. The utility also projected annual rate increases of about 4.5% to 5% over the next five years. System development fees, which are growth-related charges paid by new development, were set to rise by about 9% to reflect higher construction and renewable-water costs.

Planned capital work spelled out in the announcement included an expansion of the Plum Creek Water Purification Facility and enhancements to the WISE imported renewable water system. The plan also calls for upgraded filters at the Miller and Meadows treatment plants, rehabilitation of a wastewater lift station, and assorted infrastructure repairs and upgrades. Specific neighborhood projects named include a water line replacement scheduled in 2027 for the Young American neighborhood and movement forward on a Paintbrush Park pond stabilization project.

For Douglas County residents, the immediate impact will be modest higher monthly bills for most households, but the longer term implications may be broader. Builders and developers are likely to feel the effect of the higher system development fees, which can factor into the cost of new homes and commercial projects. Construction phases for upgrades such as the Young American line replacement could bring temporary disruptions in affected neighborhoods in 2027.

Castle Rock Water emphasized that it operates without profit or tax funding, relying on rates and fees to cover costs and conducting annual reviews to pace increases gradually. The utility framed the investments as measures to secure supply reliability, modernize aging infrastructure and shift toward renewable water sources, aligning with broader trends among utilities coping with rising costs and climate-driven supply concerns.

Residents should expect the new rates to appear on February bills and look for project notices from the town about timing and neighborhood impacts as specific work moves forward.