Site Visit (Pre-Tender)

A pre-tender site visit is an opportunity that many bidders underuse. Visiting the physical location of a contract before submitting a tender response gives suppliers direct evidence that no specification document can fully replicate: the actual condition of assets, the practical constraints of access and working, the culture of the site, and the context that makes a methodology genuinely fit for purpose rather than generically plausible.

What is a pre-tender site visit?

A pre-tender site visit is a visit to the premises, infrastructure, or operational environment covered by a public procurement contract, arranged before or during the tender period to help suppliers understand what they are pricing and proposing to deliver.

Site visits take two main forms in European public procurement:

Mandatory site visits. The contracting authority requires all bidders to attend a scheduled visit as a condition of submission. Missing a mandatory site visit typically disqualifies the bid. Mandatory visits are more common in works and maintenance contracts where the physical condition of assets is directly relevant to the tender response.

Optional or encouraged site visits. The authority offers a visit but does not require it. Suppliers who attend gain information that those who do not attend will lack. In competitive procurements, choosing not to attend an optional site visit cedes an information advantage to competitors.

Self-directed visits. For some contracts, particularly those covering publicly accessible locations, suppliers may visit independently without a formal authority-arranged event. The authority may acknowledge this in the tender documents or leave it to suppliers to arrange.

What a site visit reveals that specifications do not:

• The actual condition of buildings, equipment, or infrastructure (which may differ from what the specification implies).
• Access constraints: restricted hours, security requirements, or logistical challenges for mobilisation.
• The scale and complexity of the working environment in practice.
• Existing staff, incumbent contractor presence, and TUPE-relevant context.
• The buyer's operational culture and priorities, observable from the site team's questions and comments.

Questions raised during a site visit by suppliers are often recorded and answered in a formal clarification response distributed to all tenderers. Verbal answers given on-site are not binding: any information that affects the tender response must be confirmed in writing through the formal clarification process.

Why site visits matter for bidders

Suppliers who write technical proposals and method statements without visiting the site are working from a description, not from direct knowledge. This leads to generic responses that do not reflect the specific conditions, and to pricing that may be too high (because the risk allowance compensates for unknown factors) or too low (because a specific constraint was missed).

A well-conducted site visit also provides material for the technical proposal: referencing specific site observations demonstrates to evaluators that the supplier has done the work to understand the contract, which is itself a quality signal.

Example

A Dutch building services company attends a mandatory site visit for a public building maintenance contract in Belgium. During the visit, the site manager notes that the building has a listed facade that imposes restrictions on external access equipment. This detail was not clearly stated in the specification. The company adjusts its mobilisation method statement and pricing to reflect specialist access equipment, submits a bidder clarification question to confirm the restriction applies, and receives a clarification response that confirms it and is distributed to all bidders. Competitors who attended the visit also have this information; those who did not may price incorrectly.

Frequently Asked Questions

Is attendance at an optional site visit worth the time and travel cost?

For contracts of significant value, almost always yes. The intelligence gained typically more than justifies the cost in improved proposal quality and reduced pricing risk. For smaller contracts, a pragmatic assessment of the information value versus travel cost is appropriate.

Can I send a junior team member to a site visit?

Yes, but the person attending should be capable of identifying technical and commercial questions relevant to the bid, not just photographing the site. Technical staff who will write the method statement benefit most from attending.

What should I do during a site visit?

Walk the full scope of the site or works. Take photographs (subject to any security restrictions). Note conditions, constraints, access routes, and anything that differs from the specification. List questions to raise through the formal clarification process. Speak to the buyer's site representative, but treat any answers as informal intelligence to be confirmed in writing.