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To say no to a design change without disrupting construction, acknowledge the request, explain which agreed project outcomes it could affect, and send it through the contract’s change-control process. Make clear that the proposal is not approved yet, ask for its cost, schedule, safety and approval implications, and confirm who has authority to decide. The right response depends on the executed contract, your role and the project’s jurisdiction—especially if the request involves an active safety or code concern.
What should I say when someone asks for a design change?
Be firm about the process, not hostile toward the person making the request. A useful first response acknowledges the proposal, identifies the project commitments at risk, and explains what information and approvals are needed before a decision.
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“Thanks for raising this. We need to protect the approved scope, budget and completion date. Please submit the reason for the change, options, cost and schedule effects, and any safety or approval implications through our agreed change process. We are not authorizing it at this stage; please follow the contract’s instructions for the affected work while we review it.”
Adapt the final sentence to the actual contract and circumstances. Do not use it to direct a contractor to stop, continue, or alter work unless you have the authority to do so and the contract’s procedure supports that direction. If there is a safety, code or urgent site condition, escalate it promptly rather than treating it as an ordinary preference request.
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A concise answer can still be clear about the decision. If the request is incomplete, say it cannot be evaluated yet. If you have decided against a discretionary change, say it is declined and give the project-based reason. If you need time to assess it, call it deferred—not approved—and identify what remains to be resolved.
Is a design-change request automatically an instruction?
No. A suggestion, request or discussion about a different design is not necessarily an authorized instruction to change the work. Check the executed contract and project procedures to establish who can instruct work and who can approve changes to cost or contract time.
The American Institute of Architects explains that, under typical construction agreements, the client and contractor are the parties who may approve changes to the contract sum or time. It also notes that some standard agreements give an architect limited authority over minor changes that do not affect cost or schedule. The actual agreement governs; a project team should not assume that an architect, owner representative, superintendent or other participant can approve every change.
For Scottish public-sector construction, the Scottish Government’s change-control guidance says to route requests through the formal process and identifies the contract administrator and authorized person for instructions. That is useful process guidance, but it should not be presented as a universal rule for private work or projects elsewhere. In public procurement, Federal Transit Administration guidance likewise emphasizes the contract’s changes clause and authorized administration; some clauses may require a contractor to proceed while compensation is settled later.
When roles are unclear, do not settle the question by sending a casual email that sounds like approval. Confirm the authority and route with the contract administrator or the person designated by the agreement. If a serious dispute or material safety or code issue is involved, involve qualified professional or legal advisers promptly.
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How do I assess a request before deciding?
First determine what kind of issue the request presents, then obtain enough information to compare it with the approved design and project commitments. A quick but structured review is less likely to reject a necessary correction—or accidentally approve a costly preference.
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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →- Classify the request. Is it a preference, value-engineering idea, design correction, coordination problem, site condition, safety or code issue, or a formal contractual instruction? The reason matters: a discretionary enhancement is different from a request that may address an error, an unforeseen condition or a compliance concern.
- Ask for a complete submission. Request a description of the proposed change and its reason; alternatives considered; affected drawings, specifications and work; direct and consequential costs; design and review time; procurement and material lead times; sequencing and downstream dependencies; safety and code implications; and any required approvals or consents.
- Check authority and timing. Confirm who may issue an instruction, who may approve any adjustment to contract sum or time, and what notice or review deadlines apply. Escalate the request to the right decision-maker promptly so the review itself does not create avoidable uncertainty for the people planning the work.
- Compare the proposal with agreed outcomes. Consider whether it supports the approved brief or business case, and weigh cost, programme, technical coordination, safety, approvals, certainty and reversibility. Ask whether deferring the decision preserves an option or makes a later change more difficult.
- Decide and document. Approve, reject, defer pending information, or ask for a revised option. Record the decision, rationale, responsible approver and next step in the project’s change process.
The Scottish Government’s construction guidance specifically calls for assessing impacts such as cost, specification, health and safety, programme, materials, approvals and consequential effects. It also warns that the cost of change rises as a project progresses. That is a reason to surface impacts early, not a reason to rush an unreviewed decision.
How should I compare the options?
For a discretionary request with more than one viable path, compare each option against the same project priorities. Do not reduce the choice to the immediate construction cost if a change may also affect design coordination, procurement, approvals or the programme.
| Decision factor | Questions to answer |
|---|---|
| Project objective | Does the proposal support the approved brief or business case, or introduce a new preference? |
| Cost | What are the direct work costs, consultant time, preliminaries and other consequential costs? |
| Programme | How much design and review time is needed? Will procurement lead times, sequencing, delay or extension-of-time considerations change? |
| Technical and safety impact | What other work must be coordinated? Are building performance, health and safety, code requirements or required consents affected? |
| Authority and certainty | Is the request within the agreed scope, and who has authority to approve or instruct it? |
| Reversibility | Would deferring the decision preserve a workable option, or could waiting make the change more expensive or difficult? |
Where the request is not fully priced or its schedule effect is uncertain, distinguish known facts from estimates and open questions in the review record. A decision-maker should be able to see what is confirmed, what remains conditional, and what information is needed for a reliable decision.
How can I say no without damaging the working relationship?
State the decision in neutral, project-centered language and give the other party a clear next step. Criticizing someone for raising a proposal can discourage people from flagging legitimate coordination, safety or compliance problems.
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- When retaining the approved design: “We are keeping the approved design so we can protect the agreed budget and completion date.”
- When information is missing: “I can’t approve this on the information provided. Please send the cost, programme and downstream effects through the change process.”
- When safety or approvals need review: “This is deferred until we confirm the safety and approval implications. Please route it through the contract administrator.”
- When declining after review: “We’ve reviewed the proposal and are declining it because it does not support the project’s agreed priorities. Please continue only as the contract directs.”
These are communication examples, not contract instructions. Replace “we” or “I” with the actual decision-maker’s role where useful, and avoid implying that the person sending the message can issue an instruction if the contract assigns that authority elsewhere. A short reason tied to the brief, budget, timing, performance or safety is generally more useful than a bare “no.”
If the request comes from a client or senior stakeholder, acknowledge the underlying need and offer a bounded alternative where one is available: for example, ask whether a lower-impact option would meet the same objective, or whether the proposal should be considered for a later phase. Do not promise that an alternative is feasible until its effects have been reviewed.
What should I put in the change record?
Keep a written record that lets the project team understand what was proposed, who decided, and which design and programme remain current. A conversation may help clarify a request, but it should not be the only record of a consequential decision.
A change request or register entry can capture:
- Request identifier, date received and person or organization submitting it.
- Description, reason, affected drawings, specifications, packages and work already in progress.
- Options considered and the cost, programme, procurement, sequencing and downstream effects for each.
- Safety, code, technical coordination and approval or consent implications.
- Contractual route, authorized reviewers and decision-maker, including any applicable notice or response timing.
- Decision status—approved, rejected, deferred or returned for more information—plus rationale, conditions and date.
- Required follow-up, responsible person, communication recipients and the current revision of relevant baseline documents.
The AIA recommends using standard change-order forms, while Scottish Government guidance describes change request forms and a change register. Use the forms and process required by the project’s contract and execution documents; a generic template should not replace a contractually specified procedure. The project should also maintain one clear, current version of the approved design, cost plan and programme so that a rejected or pending proposal is not mistaken for the live baseline.
Will a design change delay my construction project?
It can, but the effect depends on the proposal, the work sequence, procurement status, review time and contract. The request may add design coordination or approval time, affect material lead times, or change the order in which work can proceed; it may also be possible to defer or reject a discretionary change without changing the programme.
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Ask the requester to show the effect on the current programme, including design and review duration, procurement, dependencies and any affected activities. Distinguish a possible schedule impact from an agreed extension of contract time: the latter must be handled under the contract’s rules and by the party or person with authority. Do not assume that saying no automatically prevents a delay claim, or that accepting a proposal automatically grants extra time.
Federal Transit Administration contract-administration guidance illustrates why the contract matters: some changes clauses may require an authorized contractor to proceed while price or schedule is resolved later. The FTA also describes negotiating price and schedule before issuing a change as generally good practice. That guidance concerns public procurement and federal contract administration; it is not a universal instruction for every project. Follow the executed agreement and consult its authorized administrator rather than telling every contractor either to stop or to continue.
What mistakes can turn a simple refusal into a project problem?
Most avoidable trouble comes from unclear authority, incomplete impact information or an ambiguous record—not from the word “no” itself. Keep the response procedural and make the status of the request unmistakable.
- Rejecting before understanding the reason: A request may relate to a correction, coordination problem, site condition, safety risk or code concern. Classify and assess it before deciding.
- Giving informal approval: Phrases such as “go ahead,” “that should be fine” or “we’ll sort the cost later” can create confusion. Use the authorized process and clearly distinguish discussion from approval.
- Assuming your role grants authority: A project participant may be able to review or recommend a change without being able to issue it or approve cost and time. Check the agreement and execution documents.
- Ignoring consequential effects: The drawing change may affect materials, procurement, sequencing, other trades, approvals or consultant work, not just the item being redesigned.
- Failing to close the loop: Tell affected parties whether the request is pending, declined or approved and what happens next under the contract. Update the register and applicable baseline records.
- Making a blanket claim about liability or delay: A refusal does not, by itself, settle entitlement, responsibility or notice compliance. Contract language, authority, jurisdiction and project facts matter.
When a direction is unclear and active work may be affected, seek prompt clarification through the contract administrator or other authorized channel. For a significant dispute, safety concern or code issue, involve the appropriate qualified professional or legal adviser rather than trying to resolve the issue through an improvised email exchange.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How do I keep change control from slowing the project?
Make the route and decision responsibilities clear before a request arrives. A predictable process can reduce repeated questions and make it easier to distinguish a proposal from an instruction without bypassing the contract.
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- Confirm the route at project start. Identify the contract administrator, authorized persons, required forms, review participants and approval path in the project’s governing documents.
- Use one intake point and register. Record requests centrally so teams can track status, missing information, dependencies and decisions instead of relying on scattered messages.
- Set project-appropriate response expectations. Agree how requests will be acknowledged, assessed and escalated, while observing contractual notice and decision requirements. Do not invent deadlines that conflict with the agreement.
- Ask for impacts early. Require cost, schedule, procurement, safety, coordination and approval information before a discretionary change reaches the decision-maker.
- Communicate the outcome to affected parties. State the decision and the authorized next action, then update the current design and programme records as required.
The purpose is not to make every design adjustment bureaucratic. It is to ensure that changes with cost, time, scope, technical or safety consequences are assessed and authorized by the right people, with a reliable record of what the team is actually building.
Frequently Asked Questions
Can a contractor change the plans without the owner’s approval?
That depends on the contract, the type of change and who has authority to issue or approve it. If the contractor identifies a conflict, error or site issue, raise it through the designated project process rather than treating an informal conversation as authorization.
Should I respond to a design-change request if it was only made verbally?
You can acknowledge it and ask the person to submit or confirm the proposal in the project’s required written format. Keep any response clear that acknowledgment is not approval, and follow the contract’s rules for notices and instructions.
What if the proposed change is needed to address a safety risk?
Escalate the concern promptly to the responsible site and design professionals and the contract administrator; do not leave it in the ordinary preference-change queue. The appropriate immediate action depends on the hazard, your role, applicable requirements and the contract.
Can I refuse a change if the contract administrator says to proceed?
Do not assume you can disregard an authorized instruction: some contracts require work to proceed while price or time is resolved, while other agreements may set a different process. Check the exact clause and get advice from the authorized contract administrator or a qualified adviser before directing work differently.
