Fiduciary Duties in Construction Joint Ventures: What You Can’t Ignore
When two contractors form a joint venture (JV) for a major build, they’re not just sharing equipment and crews—they’re legally bound to act in each other’s best interest. This isn’t just partnership 101. In construction, fiduciary duties are activated the moment you sign the JV agreement, and they shape every decision on site. A partner can’t quietly use the JV’s bonding capacity for a side project or award a subcontract to their cousin’s company without full disclosure.
The stakes are high. One partner’s bad move—like failing to pay a sub—can trigger a lien that halts the entire job. Courts treat construction JVs differently because the work is so interdependent. The classic case Meinhard v. Salmon still applies: partners owe each other the “punctilio of an honor the most sensitive.” You can’t contract your way out of this duty, no matter what your JV agreement says.
Loyalty Isn’t Optional—It’s Built Into the Job
The core of fiduciary duty in a JV is loyalty. But in construction, “loyalty” means specific, daily actions—not just good intentions. Think of it as a firewall between your own business interests and the JV’s mission.
We’ve seen partners lose millions because they blurred the lines. For example:
- Subcontractor bias: Steering a $2M mechanical package to your own subsidiary without competitive bids.
- Resource double-dipping: Charging the JV full rate for crane time while using the same crane at cost for your private project.
- Change order gaming: Settling a delay claim early to boost your cash flow, even if it hurts your partner’s legitimate claim.
- Cost padding: Loading expenses from a failing project onto the JV’s books under “shared overhead.”
In our experience, most disputes don’t start with fraud—they start with shortcuts that seemed harmless at the time.
How to Spot (and Stop) Conflicts Before They Blow Up
Preventing fiduciary breaches isn’t about suspicion. It’s about systems. The best JVs don’t rely on trust—they build transparency into their workflow from day one.
Here’s how it works in practice:
| Potential Conflict | Required Action | Real-World Fix |
|---|---|---|
| Partner’s affiliate bidding on electrical work | Full written disclosure before bid opening | Require competitive bids or pre-approved cost-plus markup |
| Partner bidding on nearby project | Notify JV committee before submitting bid | Committee reviews for crew/equipment conflicts; may charge capacity fee |
| One partner discovers site condition issues first | Immediate written disclosure | Joint claims manager appointed; both partners must sign off on settlements |
What Most JVs Miss: The Digital Conflict Risk
Shared project software like Procore or Autodesk Build is a double-edged sword. If Partner A’s team can see competitor bids in the system while their affiliate is also bidding, that’s a conflict—even if no one talks about it. Access to real-time data is a fiduciary responsibility now.
Solution: Define user roles and data permissions in the JV agreement. Wall off sensitive information. Audit logs should track who viewed what, when.
Profit Diversion: The Silent Killer of JV Margins
Profit isn’t usually stolen outright. It’s eroded through small, hard-to-spot accounting moves. That’s why forensic awareness is part of your fiduciary duty.
Watch for these red flags:
- Consistently high bids from a subcontractor tied to one partner
- “Field adjustments” with no daily reports or photos
- Accelerated payments to a specific vendor
- Overhead charges that jump mid-project without explanation
In one case we reviewed, a partner was charging 70% of a project manager’s salary to the JV while the manager spent half their time on other jobs. The fix? A pre-agreed allocation formula based on time logs.
How to Audit Like a Pro
Don’t wait for a dispute. Build audit triggers into your JV agreement:
- Right to request a forensic review if cost variances exceed 5% on any major line item
- Use CPAs with construction-specific experience
- Require all financial records in a shared, cloud-based system updated within 48 hours
Case studies show that JVs with real-time financial transparency have 60% fewer disputes. It’s not about control—it’s about clarity.
When Trust Breaks: What Remedies Actually Work
The law offers tools, but construction moves faster than courts. You need remedies that protect the project, not just your pride.
Here’s what works at each stage:
| Project Phase | Best Remedies | Why It Works |
|---|---|---|
| Pre-construction | Injunction, dissolution | Stop a bad-faith bid before mobilization. Leverage is highest here. |
| Active build | Expedited arbitration, constructive trust | Avoid work stoppage. A court can freeze misused funds without halting progress. |
| Closeout | Damages, accounting, buyout | Project is done. Now it’s about financial reckoning. |
The Real Cost of Breach: It’s Not Just Money
Public litigation over fiduciary duty can damage reputations, trigger bond cancellations, and get firms dropped from preferred vendor lists. In our practice, clients often prefer confidential arbitration—even if it means accepting less—just to avoid the stigma.
That’s why prevention is the best strategy. A well-drafted JV agreement doesn’t just list rules—it creates a culture of transparency.
Drafting Clauses That Hold Up on the Job Site
Generic legal language fails under construction pressure. Your JV agreement must be operational, not just legal.
Use specific, measurable terms:
- Define “conflict”: “A Material Conflict includes bidding on any project within 50 miles in the same specialty, or using affiliate subs with a markup over 5% of market rate.”
- Set data rules: “All JV financial and scheduling data lives in [software]. No siloed spreadsheets.”
- Handle force majeure: “During material shortages, partners must jointly allocate supply—no preferential treatment for outside projects.”
And don’t forget BIM data. The model belongs to the JV. No partner can use it to train AI or bid similar jobs without consent.
Planning the Exit: How to Dissolve Without Destroying
An automatic dissolution clause sounds strong—until you’re left with a half-built hospital and an angry owner. Smart agreements plan for a clean wind-down.
Include these in your JV contract:
- 30-day transition: The non-breaching partner takes over site safety and work-in-place protection.
- Lien bond funding: The breaching partner must help secure a bond to clear claims.
- Client continuity: Pre-negotiated path for the non-breaching firm to step in under the prime contract.
Also, define how to value unfinished work: use percentage-of-completion accounting, include remobilization costs, and factor in any liquidated damages.
Better Than Dissolution: The Buyout Option
Give partners a way out that doesn’t kill the project. Example: “If a fiduciary breach occurs, the non-breaching partner may buy out the other at 80% of fair market value after a 15-day cure period.”
This makes breach costly but survivable. In our experience, just having this clause reduces bad behavior by making consequences immediate and real.
Frequently Asked Questions
Fiduciary duty in a construction JV is a legal obligation where partners must act with utmost loyalty and good faith, intensified by project-specific pressures like shared control, mechanic's lien laws, and the commingling of resources toward a single goal.
The duty of loyalty requires partners to avoid conflicts, such as steering subcontracts to affiliates without transparency, charging above-market rates for equipment, or settling claims for personal gain, ensuring actions benefit the JV.
Conflict of interest prohibitions require full disclosure of financial interests in subcontractors or suppliers and forbid unilateral awards to affiliates without competitive bidding or audited cost-plus fee structures.
Disclosure must be written, immediate, and specific, covering ownership interests, affiliate pricing, competing bids, and kickbacks, submitted via standardized forms to the JV's management committee for audit trails.
Profit diversion involves manipulating project accounting, such as inflating affiliate invoices, misallocating shared costs, or padding change orders, to divert funds from the JV for personal gain.
Remedies include compensatory damages for lost profits, constructive trust on diverted assets, injunctive relief to stop harmful conduct, and forfeiture of the breaching partner's profit share.
A material breach of fiduciary duty, like undisclosed conflicts or profit diversion, can trigger dissolution rights, allowing the wronged partner to seek buyout or project takeover per the JV agreement.
Mechanic's lien laws intensify fiduciary duties because one partner's failure to pay subcontractors can result in liens against the entire project, directly harming all partners and requiring heightened loyalty.
Key clauses include material conflict thresholds, real-time financial transparency via cloud platforms, objective equipment cost allocation based on telematics, and provisions for force majeure and data ownership.
During pre-construction, injunctions or dissolution are viable; in active construction, expedited arbitration or receivership; post-construction, disgorgement or damages are more feasible for breach remedies.
Detection involves forensic accounting for red flags like abnormal cost variances, undocumented field adjustments, consistent selection of high bidders, and accelerated payments to affiliate companies.
Effective disclosure obligations create bright-line rules that prevent misunderstandings by mandating timely, written reports of conflicts, which are essential for legal remedies and maintaining trust between partners.
