Development Pro Forma Construction Assumptions

Why this matters

Which construction assumptions deserve explicit treatment in an early development pro forma before a project is presented as financially ready. In real projects, this question connects scope, documentation, cost, schedule, risk, and the next decision. A short page cannot replace project-specific review, but it can help the team arrive with better questions and a clearer record.

For developers, investors, and project sponsors, the useful outcome is not a generic checklist. It is a decision that identifies what is known, what is missing, who must answer, and what happens if the answer arrives late.

What to check first

• Separate hard cost, soft cost, land, financing, permits, utilities, site work, escalation, contingency, owner costs, and operating transition.
• Identify basis of estimate, design completeness, quantity source, market date, procurement strategy, and construction duration.
• Model approval delay, scope growth, financing carry, material lead time, and phasing effects.
• Document assumptions and open diligence items so the pro forma is not mistaken for a guaranteed budget.

A simple working sequence

1. 1. Define the decision, scope, and responsible person before asking for a number.
2. 2. Collect current drawings, photographs, approvals, contract documents, and site observations.
3. 3. Compare the response against cost, schedule, quality, safety, and closeout implications.

Keep the source material with the decision. Link the question to the current drawing, estimate, inspection, submittal, contract clause, photograph, or field report. That makes the next conversation faster and keeps a later reviewer from reconstructing the project from memory.

Common mistakes to avoid

• Using a single cost per square foot without scope or site context.
• Ignoring financing carry when the schedule moves.
• Treating contingency as profit or available scope.
• Presenting preliminary numbers without stating design and market uncertainty.

Recommended next step

Create an assumptions register beside the pro forma and update it as diligence and design become more reliable. Use the page as a starting point for a written scope or decision log, then bring the unresolved items to the appropriate licensed, design, legal, insurance, or construction professional.