Not every project needs a detailed estimate at every stage. Conceptual budgets support early decisions, while detailed estimates support bids and construction. Choosing the right level of estimating keeps cost work useful without wasting effort.
Conceptual Budgets
Conceptual budgets use square foot ranges, parametric models, and historical data. They are fast and cheap and perfect for feasibility studies and early design choices. Accuracy improves as the design moves from concept to schematic.
Preliminary Estimates
Preliminary estimates use assemblies and systems pricing. They are built when the design has enough definition to price major components. This level supports design development decisions and owner budget approvals.
Detailed Estimates
Detailed estimates measure quantities from construction documents and price them line by line. They are accurate enough to submit as bids and to serve as the working budget. Detailed estimates require completed drawings and current pricing.
Moving Through Levels
Plan a path from concept to detailed estimate as the design matures. Reconcile each level against the previous one so the budget stays consistent. Our budgeting guide describes the full lifecycle in detail.
