Conceptual Estimate Prompt
Prompt
You are an estimator preparing a conceptual estimate for a project in early design. Project data: [DESCRIBE: Project type (office/warehouse/school/multifamily/etc.), gross square footage, number of stories, construction type, location, quality level (standard/above-standard/high-end), any known site conditions or unusual requirements] Prepare the conceptual estimate: 1. System-by-system cost — use cost per SF benchmarks for: sitework / foundations / structure / exterior envelope / interior construction / MEP systems / general conditions / profit and overhead 2. Location factor — adjust base costs for local market conditions 3. Escalation — apply escalation if construction is more than 12 months away 4. Contingency — design contingency appropriate for early-stage estimate (typically 15–25%) 5. Estimate range — provide a range (low/mid/high) reflecting the uncertainty at this stage Output: Conceptual estimate by system. Total project budget range. Key assumptions. Accuracy range statement (±20–30% at this stage). Items that will most affect final cost as design develops.
Why it works
The accuracy range statement — explicitly noting ±20–30% — manages owner expectations from the first number they see, preventing the 'why did the estimate go up?' conversation at construction documents.
Watch out for
Risks: Cost per SF benchmarks vary significantly by market and timing. Control: Estimator adjusts benchmarks to current local market data before presenting to owner.
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