Pre-Bid Site Visits: What to Document and Why It Matters

On public works projects — particularly renovations, retrofits, and infrastructure upgrades — existing conditions are often the biggest source of cost risk. Drawings prepared from old as-builts may not reflect current conditions. Walls that should be open may be sealed. Utility runs shown on plans may have been relocated years ago. The pre-bid site visit is your opportunity to see what the drawings don't show — and to protect your bid accordingly.

What to Look For

The goal of a pre-bid walk-through isn't to estimate the project — you'll do that at your desk. The goal is to identify conditions that could change your estimate. Focus on:

- Access constraints. Equipment limitations, tight corridors, occupied spaces, restricted work hours. - Existing conditions that differ from plans. Hidden utilities, structural modifications, non-standard materials. - Hazardous materials indicators. Older buildings may contain asbestos, lead paint, or mold that the plans don't address. - Staging and laydown areas. Where will you store materials and equipment? Is the area shared with other trades or the public? - Coordination challenges. Other trades working in the same areas, occupied spaces requiring phased work, or limited shutdown windows.

Document Everything

Photos, video, and written notes from the site visit serve two purposes: they inform your estimate, and they protect you if conditions change or the plans turn out to be inaccurate.

At minimum, document: - Date and time of the visit. - Who attended (including agency or GC representatives). - Photos of every area relevant to your scope, with notes. - Any conditions that differ from the bid documents. - Any questions raised that need RFI answers before you can finalize your bid.

If you identify a condition that significantly affects your scope, note it as an assumption in your proposal: "This bid assumes existing conditions as observed during the pre-bid visit on [date]. Concealed conditions that differ from what was observed may result in additional costs."

This language establishes a baseline. If conditions differ from what was visible during the walk-through, you've laid the groundwork for a differing site conditions claim.

The Bottom Line

A pre-bid site visit is not a formality. It is your first and best opportunity to identify conditions that will affect your price, your schedule, and your risk. The subcontractors who walk the site with a checklist, document what they find, and build those observations into their proposal are the ones who avoid surprises during construction. The ones who skip the visit or treat it casually are the ones who end up absorbing costs they should have anticipated or excluded.