Mastering change orders: protect your budget during construction

Introduction

Change orders are the single most common source of budget overruns in commercial construction. They're also one of the least understood aspects of the process for first-time and growing operators.

Here's the uncomfortable truth: on most retail, restaurant, and medical build-outs, change orders add 10–25% to the original contract value. On a $600K project, that's $60,000–$150,000 in cost above what you agreed to pay when you signed the construction contract. For operators running tight pro formas with financing tied to a specific budget, that overage can threaten the financial viability of the entire project.

But change orders aren't inherently bad. Some are legitimate and unavoidable — unforeseen site conditions, code requirements discovered during construction, or owner-requested improvements that add value. The problem isn't that change orders exist. The problem is that most owners lack the framework, expertise, and contractual protections to evaluate whether a change order is valid, fairly priced, and actually necessary.

This guide gives you that framework.

What Is a Change Order?

A change order is a formal modification to the original construction contract — changing the scope of work, the contract price, or the project schedule (or all three). It requires mutual agreement between the owner and the contractor.

In plain terms: it's your contractor telling you the project will cost more than originally agreed, take longer than planned, or both — and asking you to authorize the change before proceeding.

The Three Components

Every change order should address:

• Scope: What work is being added, deleted, or modified?

• Cost: What is the financial impact (positive or negative)?

• Time: Does this change affect the completion date?

A change order that only addresses cost without acknowledging schedule impact (or vice versa) is incomplete — and incomplete change orders create disputes at project end.

The 5 Types of Change Orders

Not all change orders are created equal. Understanding the cause helps you evaluate legitimacy and assign responsibility.

1. Owner-Requested Changes

What it is: You decide to add, remove, or modify something after the contract is signed.

Examples:

• Adding a fourth POS station you didn't originally plan for

• Upgrading countertop material from quartz to marble

• Expanding the patio from 12 seats to 20

• Adding a walk-in beer cooler that wasn't in the original design

Legitimacy: Always legitimate — you're choosing to change the scope. But the pricing should still be fair and the schedule impact reasonable.

Prevention: Make all scope decisions during design, not during construction. Every decision deferred to the field costs more than making it on paper.

2. Unforeseen Site Conditions

What it is: The contractor discovers conditions that couldn't have been reasonably anticipated from the contract documents or pre-construction investigation.

Examples:

• Concealed asbestos or lead paint discovered during demolition

• Underground utilities not shown on as-built drawings

• Structural deterioration hidden behind walls

• Soil conditions that differ from the geotechnical report

• Existing plumbing or electrical that doesn't match the landlord's representations

Legitimacy: Often legitimate — but the key word is "unforeseen." If the condition should have been discovered during the contractor's pre-bid site investigation, it may not qualify. Questions to ask:

• Did the contractor visit the site before bidding?

• Was this condition visible or discoverable with reasonable investigation?

• Did the contract documents address this area? (If drawings showed existing conditions incorrectly, responsibility may lie with the design team, not the contractor.)

• Did the landlord's work letter promise a condition that wasn't delivered?

Prevention: Invest in thorough pre-construction investigation — selective demolition, utility locates, environmental testing. Every dollar spent on discovery before construction saves $3–5 in change orders during construction.

3. Design Errors or Omissions

What it is: The architectural or engineering drawings contain errors, conflicts, or missing information that require correction during construction.

Examples:

• Electrical panel sized for 200A but equipment schedule requires 400A

• Structural beam conflicts with the designed ductwork routing

• Plumbing drawings don't show the required grease interceptor connection

• Interior design specifies a material that's discontinued or doesn't meet code

• Mechanical drawings omit the makeup air unit required for the kitchen exhaust

Legitimacy: Legitimate as a change to the construction contract — but responsibility for the cost often lies with the design team, not the owner. Your architect/engineer carries Errors & Omissions (E&O) insurance for this reason.

Prevention: Thorough plan review before bidding (constructability review), and requiring coordination between architectural, structural, and MEP drawings before permit submission. A CM consultant can identify conflicts on paper that would otherwise become change orders in the field.

4. Code or Regulatory Requirements

What it is: A building inspector, fire marshal, or health department official requires work that wasn't shown on the approved drawings.

Examples:

• Fire marshal requires additional sprinkler heads beyond what was shown on plans

• Health department requires an additional handwashing station not in the original design

• Building inspector requires seismic bracing on suspended equipment

• ADA reviewer requires wider corridors or additional accessible features

Legitimacy: Usually legitimate — but should be rare if the design team properly researched code requirements during design. Frequent code-related change orders indicate inadequate design-phase code analysis.

Prevention: Pre-application meetings with plan reviewers during design. Engaging a code consultant for complex occupancies (medical, assembly, food service). These investments cost $2,000–$5,000 and prevent $20,000–$50,000 in code-related change orders.

5. Contractor Errors or Inefficiency

What it is: The contractor makes a mistake, installs something incorrectly, or discovers that their own bid was incomplete — and attempts to recover the cost through a change order.

Examples:

• Contractor priced the wrong material and now needs the correct (more expensive) one

• Work was installed incorrectly and must be redone

• A subcontractor's scope was incomplete in their bid, and the GC is trying to pass the gap to you

• The contractor failed to coordinate between trades, causing rework

Legitimacy: Not legitimate as an owner-funded change order. These costs are the contractor's responsibility under the original contract. A well-written contract makes this clear.

Prevention: Strong contract language, thorough bid review (catching scope gaps before award), and regular site inspections that catch errors early — before they become expensive to fix.

How to Evaluate a Change Order

When a change order lands on your desk, don't sign it immediately — even if the contractor says it's urgent. Use this framework:

Step 1: Validate the Cause

Ask: Why is this change necessary? Which of the 5 categories does it fall into?

• If it's an owner-requested change, confirm you actually want it (sometimes contractors propose "upgrades" you didn't request)

• If it's unforeseen conditions, verify the condition is genuinely unforeseen (was it discoverable?)

• If it's a design error, notify your architect — this may be their E&O responsibility

• If it's code-related, verify the requirement with the inspector directly (sometimes contractors misinterpret inspector comments)

• If it's contractor error, push it back — this isn't your cost

Step 2: Verify the Scope

Ask: Is the proposed scope of additional work actually necessary to address the issue? Is the contractor proposing the most cost-effective solution, or are they gold-plating?

• Request alternatives — "What are the options to address this, and what does each cost?"

• Verify quantities — are the labor hours and material quantities reasonable for this scope?

• Check for scope creep — is the change order including work that should already be in the base contract?

Step 3: Validate the Pricing

Ask: Is the cost reasonable for the work described?

• Labor rates: Do they match contract-specified rates? Are hours reasonable for the task?

• Material costs: Are they at market pricing? Can you verify with a supplier quote?

• Subcontractor markup: Is the GC marking up sub costs per contract terms (typically 10–15%)?

• GC overhead & profit: Is the markup percentage per contract (typically 10–15% combined)?

• Equipment/rental: Is rental duration reasonable? Are rates competitive?

• Contingency on the change: Reject this — contingency on a defined scope change is double-dipping

Rule of thumb: If a change order exceeds $10,000, request a detailed cost breakdown — not just a lump sum. Lump-sum change orders hide padding.

Step 4: Assess Schedule Impact

Ask: Does this change genuinely affect the completion date, or can it be absorbed within the existing schedule?

• Not every change order warrants additional time — some work can happen in parallel with other activities

• If time is requested, it should be specific and justified (e.g., "7 additional working days for lead time on the replacement panel")

• Reject blanket time extensions ("TBD" or "to be determined" schedule impact)

Step 5: Document Everything

Before approving:

• Written scope description

• Detailed cost breakdown

• Schedule impact (specific days, not "TBD")

• Cause classification (owner, unforeseen, design, code, contractor)

• Signature of both parties

Never approve verbally. "Go ahead, we'll figure out the cost later" is how $5,000 changes become $15,000 invoices.

Contract Provisions That Protect You

The time to protect yourself from change order abuse is before construction starts — in the contract. Key provisions:

Markup Caps

Define maximum allowable markups on change order work:

• GC overhead on self-performed work: 10%

• GC profit on self-performed work: 5%

• GC markup on subcontractor changes: 10% combined

• Sub-tier markup (sub's markup on their sub): 10%

• Maximum total markup stack: 25%

Without caps, a $10,000 scope change can become a $15,000–$18,000 change order after markups cascade through multiple tiers.

Unit Pricing

For common change order items, establish unit prices in the contract before work begins:

• Electrical: $/linear foot of conduit, $/outlet, $/circuit

• Framing: $/linear foot of wall, $/opening

• Drywall: $/SF installed and finished

• Concrete: $/SF of slab, $/CY of poured concrete

• Painting: $/SF

• Plumbing: $/fixture connection

With pre-agreed unit prices, change order pricing is a math exercise — not a negotiation.

Time and Material Caps

If work must proceed before pricing is agreed (emergency conditions), require:

• Daily time sheets signed by both parties (contractor and owner's representative)

• Material receipts or invoices

• A "not-to-exceed" cap that requires stop-work and re-authorization if reached

• No markup on T&M work beyond a defined percentage

Required Documentation

Your contract should specify that no change order is valid unless it includes:

• Written description of changed work

• Itemized cost breakdown (labor, material, equipment, markups)

• Schedule impact in working days

• Reference to the contract provision or condition that triggered the change

• Owner's written authorization before work proceeds

No-Damage-for-Delay Clause (With Limits)

Protect yourself from contractors claiming delay costs due to change orders you issue — but be reasonable. A mutual waiver of consequential damages protects both parties.

Change Order Management Best Practices

Track Everything in a Log

Maintain a change order log from day one:

• CO #: 001; Date: 3/15; Description: Additional floor drain — health dept requirement; Cause Code: Code; Cost: $3,200; Time (Days): 0; Status: Approved

• CO #: 002; Date: 3/22; Description: Concealed water damage — demolition discovery; Cause Code: Unforeseen; Cost: $8,400; Time (Days): 3; Status: Approved

• CO #: 003; Date: 4/01; Description: Upgraded bar countertop — owner request; Cause Code: Owner; Cost: $4,800; Time (Days): 0; Status: Approved

• CO #: 004; Date: 4/10; Description: Electrical panel undersized — design error; Cause Code: Design; Cost: $12,500; Time (Days): 5; Status: Under review

Set Authorization Thresholds

Not every change order needs to go to the owner for approval. Define thresholds:

• Under $2,500: Project manager or CM consultant can authorize (with notification to owner)

• $2,500–$10,000: Owner reviews and approves within 48 hours

• Over $10,000: Owner reviews with CM consultant recommendation; 5 business days to respond

Clear thresholds prevent construction delays while maintaining budget control.

Hold Weekly Change Order Reviews

Don't let change orders accumulate. Review pending and potential changes weekly during your OAC meeting:

• What change orders are pending approval?

• What potential changes are the contractor seeing ahead? (Early warning prevents surprises)

• What's the cumulative change order total vs. contingency budget?

• Are there trending causes that indicate a systemic problem? (Multiple design errors = design team issue)

Challenge Early, Not Late

If you're going to push back on a change order, do it immediately — not weeks later. Contractors have stronger negotiating positions once work is complete ("We already installed it — are you going to have us tear it out?"). Challenge scope, pricing, and legitimacy before work proceeds.

What "Normal" Looks Like

Not every change order is a sign of a bad project. Here's what healthy change order volume looks like vs. warning signs:

• Metric: Total change orders as % of contract; Healthy: 3–8%; Concerning: 8–15%; Alarm: 15%+

• Metric: Owner-requested changes; Healthy: 50%+ of total CO value; Concerning: —; Alarm: Less than 25% (means contractor/design issues dominate)

• Metric: Unforeseen conditions; Healthy: 1–3 items, modest cost; Concerning: 5+ items, growing cost; Alarm: Pattern suggests inadequate pre-construction investigation

• Metric: Design errors; Healthy: 0–2 minor items; Concerning: 3–5 items; Alarm: 5+ items = design team quality problem

• Metric: Average response time; Healthy: 3–5 business days; Concerning: 1–2 weeks; Alarm: 2+ weeks (you're causing delays)

When to Escalate

If your cumulative change order volume exceeds 10% of the original contract, it's time to step back and diagnose the root cause:

• Is the design team producing incomplete documents? → Formal quality conversation; consider E&O claim for cumulative design errors

• Is the contractor submitting speculative changes? → Tighten documentation requirements; reject anything without full backup

• Are you making too many owner changes? → Establish a design freeze date; stop modifying scope during construction

• Are site conditions genuinely worse than expected? → Evaluate whether additional contingency is needed; adjust pro forma

How Orso Bruno Helps with Change Orders

Change order management is one of the highest-value services Orso Bruno provides. Here's what we do:

How Orso Bruno Consulting Protects Your Budget

At Orso Bruno, change order management isn't a reactive service — it's embedded into everything we do from day one. Our approach is built on the principle that the best change order is the one that never happens.

Before Construction Starts

• Lease review with construction eyes. We identify delivery condition gaps, ambiguous work letter language, and landlord obligations that — if left unclear — become change orders the moment demolition begins. Clarifying these terms before lease execution eliminates an entire category of "unforeseen" costs.

• Constructability review of design documents. We review your architect's and engineer's drawings before they go to bid — flagging conflicts, omissions, and coordination gaps that would otherwise surface as design-error change orders during construction. On a typical project, we catch 5–15 issues on paper that would have cost $20,000–$80,000 in the field.

• Thorough pre-construction site investigation. We coordinate selective demolition, utility locates, and existing-condition documentation so that "unforeseen site conditions" are genuinely unforeseen — not items that should have been discovered with reasonable diligence.

• Contract structuring. We draft or negotiate change order provisions in your construction contract — markup caps, unit pricing, documentation requirements, and authorization protocols — so the rules of engagement are clear before a single change order is submitted.

During Construction

• Real-time pricing validation. When a change order hits, we evaluate it the same day — verifying scope, checking labor rates against contract terms, validating quantities against field conditions, and benchmarking total cost against our database of similar work. We know what things cost, and we know when pricing is inflated.

• Cause analysis and responsibility assignment. We determine who's responsible for each change: Is this truly the owner's cost, or should the design team's E&O insurance cover it? Did the contractor miss this during their pre-bid investigation? Is the landlord's work letter deficient? Properly assigning responsibility typically shifts 20–40% of change order costs away from the owner.

• Negotiation on your behalf. We negotiate with your contractor directly — technically and commercially — without damaging the working relationship. Because we speak the contractor's language and can challenge pricing line-by-line, we consistently negotiate 15–30% reductions on initial change order proposals.

• Trend identification. We track change orders by cause code across the project. When patterns emerge (repeated design errors, recurring "unforeseen" conditions in the same system), we address the root cause — not just the symptoms — preventing the next 5 change orders, not just resolving the current one.

The Results Our Clients See

• Metric: Change orders as % of contract; Industry Average (Unmanaged): 15–25%; Orso Bruno-Managed Projects: 3–8%

• Metric: Average CO processing time; Industry Average (Unmanaged): 2–3 weeks; Orso Bruno-Managed Projects: 3–5 business days

• Metric: Owner-funded COs that should have been others' responsibility; Industry Average (Unmanaged): 40–60%; Orso Bruno-Managed Projects: Under 15%

• Metric: Average negotiated reduction on CO pricing; Industry Average (Unmanaged): Minimal (no expertise to challenge); Orso Bruno-Managed Projects: 15–30% per CO

A real example: A restaurant client received a $38,000 change order for "unforeseen plumbing conditions" during demolition. Our review determined that (a) the condition was partially visible during the contractor's pre-bid walk-through ($12,000 attributed to contractor's responsibility), (b) the landlord's work letter promised a condition that wasn't delivered ($9,000 attributed to landlord), and (c) the legitimate unforeseen portion was fairly priced at $14,000 — not $17,000 as proposed. Net result: client paid $14,000 instead of $38,000. One change order. $24,000 saved.

That's what construction expertise on your side of the table looks like.

• Pricing validation: We know what things cost. We can tell the difference between a fairly priced change and one with $10K of padding buried in labor hours and markups.

• Cause analysis: We identify whether the change is truly the owner's responsibility or should be attributed to the design team or contractor.

• Negotiation: We negotiate on your behalf — technically and commercially — without damaging the contractor relationship you need to maintain for the remainder of construction.

• Documentation: We ensure every change order is properly documented, classified, and tracked — creating the paper trail you'll need if disputes arise later.

• Prevention: Through proactive constructability review, bid analysis, and pre-construction planning, we prevent many change orders from occurring in the first place.

The ROI: If Orso Bruno's proactive management reduces your change order volume from 15% (unmanaged average) to 5% (well-managed average) on a $700K project, that's $70,000 in savings — far exceeding our fee.

Conclusion

Change orders are inevitable in construction. But runaway change orders — the kind that add 20–30% to your budget and push your opening date by weeks — are preventable. They're prevented through strong contracts, thorough pre-construction planning, disciplined evaluation processes, and consistent accountability.

The operators who maintain budget control aren't the ones who never receive change orders. They're the ones who have the expertise, processes, and contractual protections to evaluate every change rigorously — approving what's legitimate, challenging what's inflated, and preventing what's avoidable.

If change orders feel like a black box on your projects, that's a sign you need someone in your corner who can open it.

Orso Bruno Construction Management Consulting helps retail, restaurant, grocery, and medical operators manage change orders with discipline — validating pricing, challenging unjustified claims, and preventing avoidable scope changes through proactive project management.

Tired of budget surprises? Let's build a change order management framework for your next project.