1.4 AIA A701 Instructions to Bidders & Bidding Rules
Key Takeaways
AIA Document A701-2018 governs the competitive bidding environment, establishing strict countdown deadlines: substitution requests must be received 10 days prior, interpretation requests 7 days prior, and Addenda issued no later than 4 days prior to bid opening.
Under Article 2, submitting a bid constitutes a legally binding representation that the bidder has examined the site, correlated observations with contract documents, and based their bid strictly on the specified materials without unauthorized qualifications.
Bid security (typically 5% to 10% in the form of a bid bond or certified check) protects the owner against the winning bidder's failure or refusal to enter into contract and provide required performance/payment bonds.
Public contracts mandate award to the lowest responsive (compliant with all bidding instructions) and responsible (demonstrating technical capability, financial solvency, and integrity) bidder.
Bids cannot be withdrawn after opening during the designated holding period (typically 30 to 90 days), subject to applicable provisions for clerical errors, owner financial evidence and jurisdictional rules.
Apply the actual procurement rules
Public procurement requirements vary by jurisdiction, funding source and solicitation. Read the stated receipt, attendance, responsiveness, award and protest rules. Examples in this section assume a competitive low-bid process with material requirements enforced as stated. Private negotiated work can use different selection criteria. AIA forms do not create a universal public procurement statute.
1.4 AIA A701 Instructions to Bidders & Bidding Rules
Competitive bidding relies on procedural fairness, strict deadlines, and transparent evaluation criteria. In standard architectural practice, these rules are governed by AIA Document A701-2018 (Instructions to Bidders). While A701 is not a contract between the owner and the contractor—it is an instructional instrument that forms part of the Bidding Documents—its provisions establish legally binding rules that control the procurement process until the construction contract (e.g., AIA Document A101-2017) is formally executed.
The Architecture of AIA Document A701-2018
AIA A701 is organized into eight articles that govern every operational step of the bidding phase:
- Article 1: Definitions (Bidding Documents, Bid, Base Bid, Alternate, Unit Price)
- Article 2: Bidder's Representations
- Article 3: Bidding Documents (Copies, Interpretation, Substitutions, Addenda)
- Article 4: Bidding Procedures (Form and Style, Bid Security, Submission, Modification/Withdrawal)
- Article 5: Consideration of Bids (Opening, Rejection, Acceptance/Award)
- Article 6: Post-Bid Information (Contractor's Qualification Statement, Subcontractor lists)
- Article 7: Performance Bond and Payment Bond
- Article 8: Enumeration of the Proposed Contract Documents
Article 2: Bidders' Representations and Due Diligence
Submitting a bid makes six representations under A701-2018 § 2.1:
- Document understanding (§ 2.1.1): The bidder has read and understands the bidding documents.
- Related work (§ 2.1.2): The bidder understands the relationship to other project portions being bid or built.
- Compliance (§ 2.1.3): The bid complies with the bidding documents.
- Site review (§ 2.1.4): The bidder has visited, reviewed local conditions and correlated observations with the proposed contract documents.
- Specified basis (§ 2.1.5): The bid uses the required materials, equipment and systems without an undisclosed exception.
- Liquidated damages (§ 2.1.6): The bidder understands any liquidated-damages provisions in the proposed agreement.
The Legal Impact of Article 2
An observable condition is a reason to investigate and request clarification before bidding. A bidder should report a visible drainage culvert that conflicts with the proposed foundation rather than assume free removal later. This due-diligence duty does not eliminate every differing-site-condition claim: compare the actual contract indications, reasonable observations, notice and resulting cost or time effects under A201 § 3.7.4.
Article 3: Interpretations, Substitutions, and Addenda Timelines
AIA A701 establishes a strict, time-sensitive countdown calendar that candidates should be able to apply, subject to project amendments:
1. Written Requests for Interpretation (§ 3.2)
- Bidders must study the documents and promptly report any errors, inconsistencies, or ambiguities to the architect.
- Bidders requiring clarification must submit a written request to the architect at least 7 days prior to the date for receipt of bids (A701 § 3.2.2).
- The architect responds by issuing an Addendum to all plan holders.
2. Proposed Substitutions Prior to Bid Opening (§ 3.3)
Bidders who wish to base their pricing on an alternate material, equipment item, or system not explicitly named in the specifications must submit a formal Substitution Request:
- 10-Day Cutoff (§ 3.3.2.1): The written request must be received by the architect at least 10 days prior to the date for receipt of bids.
- Required Documentation (§ 3.3.2): The request must include complete technical data, samples, performance testing results, side-by-side specification comparisons, and a statement of any schedule or cost impacts on other trades.
- Architect's Sole Discretion (§ 3.3.3): The burden of proof rests on the proposer. The architect's decision to approve or reject a proposed substitution is final.
- Addendum Requirement (§ 3.3.4): If approved, the architect does not notify the requesting bidder privately. Instead, the architect issues an Addendum to all prospective bidders, allowing every competitor to utilize the newly approved product.
3. Addenda Distribution Rules (§ 3.4)
- 4-Day Cutoff (§ 3.4.3): Addenda must be issued no later than 4 days prior to the date for receipt of bids.
- The 4-Day Rationale: Contractors assemble sub-bids from dozens of trades during the final 48 to 72 hours. Issuing technical changes less than 4 days before bid opening causes pricing errors, chaos, and missed bids.
- The Exception: An Addendum withdrawing the request for bids or postponing the bid date may be issued at any time prior to the scheduled bid opening.
- Receipt and acknowledgment: Verify that all Addenda have been received and acknowledge them as the Bid Form requires. Under the stated strict low-bid procedure, an omitted acknowledgment affecting price or scope is a material responsiveness issue; apply the governing procurement rules.
Article 4: Bidding Procedures, Bid Security, and Irrevocability
Form of Bid (§ 4.1)
Bids must be submitted on the official Bid Form provided in the Project Manual without alterations, unauthorized conditions, or qualifications. All blanks must be filled in with ink or typed, numbers stated in both words and figures (with words prevailing in the event of a discrepancy), and executed by a legally authorized officer.
Bid Security (§ 4.2)
Bid Security guarantees that the bidder, if awarded the contract, will execute the agreement and furnish required performance and payment bonds.
- Acceptable Forms: Bid security may be a Bid Bond (typically AIA Document A310-2010) issued by an authorized surety, a certified check, or a cashier's check.
- Percentage: Usually stipulated as 5% to 10% of the total bid sum (including accepted alternates).
- Default remedy: Apply the actual security instrument and procurement law. Under A310-2010, a selected bidder’s failure to execute the contract and furnish required bonds can trigger the cost difference for award to the next qualified bidder, capped by the bond’s penal amount. Do not assume every check, bond or jurisdiction uses an identical forfeiture remedy.
Submission and Late Bids (§ 4.3)
Submit bids in the paper or electronic form and location specified in the bidding instructions. Paper instructions may require a sealed, labeled envelope; A701-2018 also accommodates electronic delivery.
A bid received after the exact time and date designated for receipt will be returned unopened.
Apply the stated receipt method, deadline and governing procurement law. A701 supports electronic as well as paper submissions. Do not invent a private exception for a favored bidder; refer disputed timeliness or statutory exceptions to the procurement authority.
Modification or Withdrawal of Bids (§ 4.4)
- Prior to Bid Opening (§ 4.4.1): A bidder may modify or withdraw their bid at any time prior to the designated bid opening time, either in person or by written notice.
- Post-Opening Holding Period (Article 4.4): The bidding documents state the period during which the bidder must hold its price. Read that period together with the clerical-error process, owner-financing provisions and applicable law; a holding period is not an exception-free ban on withdrawal.
- Clerical withdrawal (§ 4.4.3): A701-2018 provides for withdrawal within two days after opening, or the jurisdiction's specified period, with evidence of the clerical error to the architect's reasonable satisfaction. The bid is withdrawn and not resubmitted. Distinguish that procedure from a discretionary price increase or an unsupported assertion that estimating judgment was poor.
Article 5: Bid Consideration, Responsiveness, and Responsibility
Under A701 Article 5, the owner reserves the right to reject any or all bids, waive informalities or minor irregularities in a bid, and accept the bid that best serves the owner's interests.
For a public procurement whose published rules require low-bid award, evaluate the lowest responsive and responsible bidder. Other lawful procurements can use best-value or negotiated selection:
Disqualification Criteria
- Non-Responsive: The submission fails to comply with the instructions in the Bidding Documents (e.g., missing bid bond, unacknowledged addendum affecting scope, qualified bid stating "subject to steel price fluctuations"). Material price or scope deficiencies generally cannot be privately cured after opening under strict low-bid rules; distinguish waivable minor irregularities under the governing law.
- Non-Responsible: The contractor lacks the financial capability, technical competence, bonding capacity, or past track record to successfully perform the work. A contractor with an active felony indictment or an exhausted bonding line may be deemed non-responsible.
AIA A701 Critical Deadlines and Enforcement Rules
| Timeline Milestone | A701 Contract Provision | Mandatory Procedural Action | Legal Consequence of Non-Compliance |
|---|---|---|---|
| 10 Days Prior to Bid | Section 3.3.2.1 | Submit proposed product substitutions in writing | Late substitution requests rejected without technical evaluation |
| 7 Days Prior to Bid | Section 3.2.2 | Submit written requests for interpretation / RFIs | Architect is not obligated to answer late inquiries |
| 4 Days Prior to Bid | Section 3.4.3 | Last day for architect to issue technical Addenda | Addenda issued < 4 days prior requires postponing bid opening date |
| Bid Opening Deadline | Article 4.3 and solicitation | Deliver the specified paper or electronic bid to the designated recipient | Apply the stated deadline and governing late-bid rules |
| Holding Period | Article 4.4 and solicitation | Hold the bid for the stated period | Check clerical-error, financing and statutory exceptions before assessing security liability |
| Contract Award | Section 5.3 | Owner applies the stated lawful award criteria | Unsuccessful bidders have bid security returned within agreed period |
An institutional laboratory project is being bid under AIA Document A701-2018. Bids are scheduled to be opened on Thursday, October 24, at 2:00 PM. On Friday, October 18, at 4:30 PM (6 days prior to bid opening), a prospective bidder submits a comprehensive substitution request for an alternative variable refrigerant flow (VRF) HVAC system, supported by engineering calculations and warranty data. The mechanical engineer determines that the alternative equipment is technically superior and would save the client $75,000. How must the architect handle this substitution request under AIA A701-2018? Assume the bidding instructions retain the ten-day cutoff, and the owner will not postpone the bid date.
Accept the substitution immediately and email an approval notice directly to the requesting contractor since it provides significant cost savings.
Issue an emergency Addendum on Tuesday, October 22 (2 days before bid opening) approving the substitution for all bidders.
Evaluate the submittal and, if acceptable, instruct the contractor to include the substitution as a voluntary alternate on their bid form.
Decline the substitution for this bid because it missed the unamended ten-day request deadline; tell the bidder to price the specified system.
At a public bid opening for a municipal community center, three bids are opened. Contractor A submits a base bid of $4,200,000, Contractor B submits $4,280,000, and Contractor C submits $4,350,000. During the responsiveness review, the architect notes that Contractor A failed to acknowledge receipt of Addendum No. 3 on its bid form. Addendum No. 3 added $65,000 of mandatory structural helical piers to address poor subsurface soil conditions. How should the architect advise the owner regarding the award of this contract?
Advise the owner to allow Contractor A to sign an addendum acknowledgement affidavit after bid opening and add $65,000 to their base bid.
Advise the owner that Contractor A's bid must be rejected as non-responsive because failure to acknowledge an addendum affecting price and scope confers an unfair competitive advantage, making Contractor B the lowest responsive bidder.
Advise the owner to accept Contractor A's bid because the omission is an informal clerical error that the owner can unilaterally waive under Section 5.2.
Advise the owner to reject all bids and re-bid the entire project because the structural addendum altered the baseline scope.
Two hours after public bid opening, the apparent low bidder contacts the architect in distress, stating that a spreadsheet formula error omitted the entire structural steel framing package from their bid calculation, resulting in an inadvertent $350,000 shortfall on a $2,800,000 bid. The contractor requests permission to withdraw the bid immediately without forfeiting their 5% bid bond ($140,000). The contractor produces contemporaneous estimating worksheets and software formulas proving that the error was purely clerical and not a judgment error. Under unmodified AIA A701-2018 § 4.4.3, with no different jurisdictional withdrawal deadline, what is the appropriate outcome?
The contractor is permitted to withdraw the bid without forfeiture of the bid security, because the error was an honest, verifiable mathematical/clerical mistake rather than an error in judgment, prompt notice was provided, and enforcement would be unconscionable.
The contractor must forfeit the entire $140,000 bid bond because bids are strictly irrevocable upon opening under AIA A701 Section 4.4.1.
The owner must allow the contractor to adjust the bid upward by $350,000 and retain the contract award if the adjusted price remains the lowest bid.
The architect must re-evaluate all competing subcontractor steel bids and assign the steel subcontract to the second-lowest general bidder.
Source and application
A201-2017 official sample; A701-2018 summary and changes; A701-2018 official partial sample; A310-2010 bid-bond summary. Checked October 16, 2026. Apply the cited form edition and the actual project amendments, adopted codes and supplied scenario assumptions. Numerical examples are teaching inputs unless expressly attributed to a requirement.
Sections you finish are checked off in the contents.