For further inquiries, contact Beth Lemanski, David C. Baker, or Kelly Juarez of PBS Real
Property Asset Management.
The agency housing and supporting floor plans must be used to organize the estimate detail by:
3 contents and degree of detail
Table 1 illustrates the formats and minimum level of detail required for cost estimates at each
Unit-price cost estimates are based on detailed design documents and developed by
adding up the direct costs of materials and supplies, labor, and construction equipment
for each individual task of construction work. The basis for these unit costs must be well
documented and included in the supporting data of the estimate. To these direct costs are
added applicable indirect costs, such as overhead and profit at a subcontractor level, to
reflect the in-place construction cost per unit of work required.
For concept design estimates, it is acceptable to use unit prices combining labor, materials,
and equipment costs in a single figure. For estimates prepared at the design development
and construction documents phases, GSA requires separate labor, material, and equipment
Items that are a significant percentage of the total project's cost require the greatest
estimating effort. For such items, indirect costs and other markups associated with each
task or work item must be separately identified and considered. On a project-by-project
basis GSA requires quotes from suppliers or specialty contractors to document the costs of
such major items, and the estimator must be prepared to discuss them with GSA.
Documentation of unit-price data for smaller items could include price quotes, audits,
catalog cuts, and historical costs to clarify price bases and assumptions made when other
information is not available. The independent government estimator provides a general
project estimating requirements P-120