Scope and inputs to reconcile
State gross versus served area, building use and systems included in the cost total. An area ratio for a warehouse is not directly comparable with a restaurant or hospital.
Workflow and checks
Use a consistent cost subtotal and area measurement. Reconcile drawing issue, location, price date and scope before comparing any historical records supplied by the contractor.
What the output should show
Show the numerator, denominator, units and exclusions, with a note distinguishing a preliminary ratio from measured quantities.
Exclusions and unresolved decisions
No current national square-foot cost range is verified here. The ratio does not price individual fixtures or establish a construction quote.
Documents to share for a quote
Provide architectural area information, occupancy, design stage and the plumbing scope required for a project-specific budget.