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Unit Costs for Improvement Projects

Any applicant seeking Final Plat and/or Development Plan approval shall provide the Department of Public Works and Development (PWD) with an itemized cost estimate of public improvements (herein after called “Exhibit A”) associated with the development. The Exhibit A is to utilize the units and costs provided in the Unit Costs for Improvement Projects in order to establish the amount of collateral that shall be secured by PWD guaranteeing that the public improvements are completed and accepted by Arapahoe County in conformance with the Improvement Agreement that shall be executed prior to completion of the land use process.
The Arapahoe County Engineering Services Division will review the Engineer’s Cost Estimate and verify that the quantities are correct and the unit costs meet the County unit quantities and minimum unit costs for construction materials and activities per Unit Costs for Improvement Projects link. The Arapahoe County Engineering Services Division determines the minimum unit costs allowable by determining the average unit costs from the annual bid tabs for capital projects. The Engineering Services Division updates the minimum unit costs on a biennial basis. The Engineering Services Division unit costs shall be for minimums only; the applicant’s engineer shall be responsible for estimating the development’s unit costs. It should be noted that the estimation of the unit costs from the bid tabulations would incorporate additional costs for traffic control, mobilization, project management as well as any other applicable items.

User Guide and Unit Costs for Improvement Projects