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Estimating & Biddingaka: job walkaka: site walk

Site Visit

In Plain English

A visit to the project site before bidding so the contractor can see actual conditions with their own eyes.

Definition

A site visit is an inspection of the project location by prospective bidders to observe existing conditions, access constraints, and site-specific factors that may affect cost. Many owners require or encourage site visits before bid submission. Contractors who fail to visit the site before bidding risk missing conditions that drive significant cost.

Why It Matters in Bidding

A site visit reveals conditions that drawings never show — soil instability, restricted lay-down space, overhead utilities, or limited working hours — all of which directly change labor productivity and equipment costs in a bid. Pricing a job without walking it is a leading cause of bid-day errors that either lose the work or erode margin after award. On public projects, attendance is often a documented prerequisite for a responsive bid.

Example

During the mandatory site visit, the demolition estimator noticed the only truck access ran under a 12-foot rail bridge, forcing smaller loads and adding roughly $40,000 of hauling cost that was absent from the plans.

Related Terms

Pre-Bid ConferenceBid DocumentsScope of WorkInvitation to Bid

Frequently Asked Questions

It depends on the owner. Many public and institutional projects make attendance mandatory and record it, so a bid from a non-attendee is rejected as non-responsive. Private owners often make it optional but strongly encouraged. Always check the instructions to bidders, since skipping a required walk can disqualify an otherwise winning proposal.
Focus on conditions that affect cost and schedule: access and staging space, existing utilities, soil and drainage, adjacent structures, security or noise restrictions, working hours, and discrepancies between the drawings and reality. Photographing and noting these helps justify allowances or exclusions and protects against later disputes over unforeseen conditions.
A pre-bid conference is a formal meeting, often indoors, where the owner explains scope and bidders ask questions answered through addenda. A site visit is the physical inspection of the location itself. Many projects schedule both back-to-back, but they serve different purposes: clarification versus firsthand observation of actual field conditions.

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