Construction Notice to Proceed: What It Is and Why It Matters

A Notice to Proceed (NTP) is the formal written authorization from the owner directing the contractor to begin work on a construction project. It is the signal that starts the clock — on the contract duration, on the contractor's schedule obligations, and on the accrual of liquidated damages if the project runs late. Despite being a single letter, the NTP is one of the most consequential documents in the construction process: it determines when the completion date is, what mobilization costs are recoverable, and whether a contractor who begins work before receiving it is protected. Understanding the NTP — when it triggers, what conditions must be met first, and what to do when it's delayed — is essential for both owners and contractors.

What the NTP Does

The Notice to Proceed accomplishes three things simultaneously:

NTP vs. Notice of Award vs. Letter of Intent

Three documents mark the progression from bid selection to construction start, and they are frequently confused:

Conditions Precedent to NTP

Owners typically require the following to be in place before issuing the NTP. This checklist also represents the contractor's mobilization readiness requirements:

• • Executed contract documents. The formal contract (AIA A101/A102, ConsensusDocs, or owner's form) is fully signed by both parties. An unsigned contract is not a contract.
• • Performance and payment bonds. Contractor has submitted and owner has accepted bonds from an approved surety. On public projects, bonds are legally required before work begins. On private projects, the contract specifies bond requirements. See construction bond types for the distinctions.
• • Insurance certificates. Contractor has submitted compliant certificates of insurance showing required coverages with the owner named as additional insured. Policy must be in force as of the NTP date.
• • Building permits. Required permits are issued. The NTP is often held until the building permit is in hand — mobilizing without a permit can trigger stop-work orders and create schedule risk for the contractor, not the owner.
• • Site access. Owner has confirmed that the site is available and accessible for construction operations — existing tenants have vacated, utilities are ready to be connected or disconnected as required, and any preconstruction hazmat surveys or abatement are complete.
• • Project financing. Owner's construction financing is in place and available to fund the project. On private work, contractors sometimes request evidence of financing before mobilizing, particularly on new developer relationships.
• • Initial submittals. Some contracts require the contractor to submit and receive approval of the CPM schedule, the Schedule of Values, and key submittals (shop drawings for long-lead items) before NTP. Review your specific contract — submittals required "prior to NTP" are different from submittals due "within 30 days of NTP."

Limited Notice to Proceed

On projects where full NTP is delayed — often due to permitting timelines, financing conditions, or owner decisions — owners sometimes issue a Limited Notice to Proceed (LNTP). An LNTP authorizes specific, defined activities to begin before full NTP:

• • Long-lead procurement — ordering steel, curtain wall, elevators, or electrical switchgear that requires 12–52 weeks for fabrication and delivery.
• • Submittals for critical-path items — initiating the submittal review cycle on items the architect needs months to review.
• • Preconstruction services — finalizing the GMP estimate, completing constructability review, finalizing the CPM schedule.
• • Site preparation — mobilizing trailers, erecting fencing, establishing temporary utilities.

An LNTP should clearly define: (1) exactly what activities are authorized, (2) the maximum expenditure authorized, (3) whether the LNTP period counts toward the contract duration, and (4) what happens to LNTP costs if the project is cancelled. Without this clarity, LNTP disputes are common at project end — particularly around whether costs incurred during the LNTP period are recoverable if the project is cancelled before full NTP.

NTP and the Completion Date Calculation

The contract duration is measured from the NTP date, not the contract execution date. This means:

The 45-day gap between contract execution and NTP does not count against the contractor. The contractor is not required to perform and cannot be assessed liquidated damages for delay during a period when no NTP has been issued. This protection disappears, however, if the contractor agreed to a fixed calendar completion date (e.g., "substantial completion by December 1") rather than a duration measured from NTP.

When the NTP Is Delayed

NTP delays are one of the most common sources of project disruption — and contractor financial exposure. When an owner delays the NTP beyond the originally anticipated date, several consequences follow:

• Labor and subcontractor scheduling disruption. Contractors commit crews, equipment, and subcontractors based on anticipated start dates. An NTP delayed by 60 days means those resources may no longer be available when construction finally begins — crews have moved to other jobs, sub slots are filled. Remobilizing may cost more or take longer.
• Material price escalation. Bids are typically valid for 30–90 days. If the NTP is delayed past bid validity, material prices may have increased — particularly in volatile markets for steel, lumber, copper, and concrete. The contract should address how material escalation during pre-NTP delay is handled.
• Seasonal impacts. A project planned to begin concrete work in September that is delayed to December faces winter concrete placement costs, potential freeze delays, and heating costs that weren't in the original budget.
• Compensable delay claim. If the contract specifies a planned NTP date and the owner delays it, the contractor may have a claim for compensable delay — the carrying costs, escalation, and lost productivity caused by the delay. Document the anticipated vs. actual NTP date, and submit a written time extension request and cost claim promptly.

NTP Best Practices

• • Never begin physical work without a written NTP. Verbal direction, email confirmations, or "go-ahead" from the owner's rep are not substitutes. Require a formal written NTP before mobilizing equipment or incurring significant project costs.
• • Confirm the NTP date in writing immediately upon receipt. Reply to the NTP acknowledging the date and confirming the resulting completion date calculation. This creates a clear record of when the contract clock started.
• • Review conditions precedent before mobilizing. Verify that all your own prerequisites (bonds, insurance, permits, key submittals) are in place before the NTP date. A missing bond or expired COI can create compliance issues that delay your ability to start even after NTP is issued.
• • Distinguish between the NTP date and the completion date in your CPM. Enter both as fixed milestones in the schedule. The NTP date is the project start; the completion date (calculated from NTP) is the contractual finish milestone against which LDs apply.
• • For phased projects, get NTPs in writing for each phase. On multi-phase projects with separate areas or buildings, each phase may have its own NTP and completion date. Oral direction to begin Phase 2 is not an NTP — get it in writing.