To: Honorable Mayor and Members of Town Council
Through: David L. Corliss, Town Manager
From: Tara Vargish, PE, Director, Development Services
Brad Boland, AICP, Long Range Project Manager
Title
Update: Residential Unit Data (through September 30, 2025) with Potential Buildout Estimates
Body
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Executive Summary
The purpose of this quarterly residential unit data update is to provide an overview of development activity and estimated population projections. This update includes data through the third quarter of 2025, ending on September 30, 2025. The data outlines the maximum zoning entitlements and growth areas approved by Council and provides an update on the pace of activity in each area of Town. During the third quarter of 2025, there were 108 single family units completed and 44 multifamily units completed. The current estimates show an approximate population of 87,838 through September 30, 2025.
Staff continues to update the potential realistic buildout estimates as more information becomes available, and updates them with each quarterly report. The potential high and low buildout calculations provide more realistic unit and population estimates to aid in planning for future Town resources.
The State Demographics Office releases updated population estimates for the previous year each July. For this report, the average household size published by the State Demographics Office is used. Over the past year, the Town’s estimated average household size decreased slightly from 2.8 to 2.78. Applying this change directly would indicate a population decrease that does not accurately reflect the growth the Town is experiencing. To account for this, a transitional average household size was applied to new housing units completed in the third quarter, helping to smooth the adjustment in household size. Beginning in the fourth quarter, the updated average household size of 2.78 will be uniformly applied in population estimates.
Attachments
Attachment A: Town of Castle Rock PD Zoning Map
Attachment B: Unit Data through September 30, 2025 with Potential Buildout Chart