EPC for owners

No contract structure transfers risk. Contracts price risk and assign its first landing place. The owner who signs "fixed price" believing risk has left the building has simply prepaid for the portion the contractor could see, and kept the rest.

Section 01What fixed-price actually fixes

A lump-sum EPC price fixes the cost of a defined scope: the work described in the drawings, specifications, and exhibits at signing, built under the site conditions the contract assumed. Everything outside that definition, discovered conditions, owner-driven changes, utility requirements that arrive after design, schedule impacts from permits, remains priced at change-order rates, which are never the bid's rates.

This is not contractor villainy; it is arithmetic. A bidder can only price what is defined, and prices uncertainty as contingency. The looser the definition at signing, the more the "fixed" price contains padding for risks that may not materialize, and the more the gaps get repriced later at monopoly rates, since switching contractors mid-project is rarely credible. The owner's real cost control therefore happens before the EPC contract exists: in the quality of the load basis, the site investigation, the utility documentation, and the equipment definition the bid is built on. Federal cost benchmarks for generation construction exist precisely because realized costs scatter widely around estimates when scope definition is weak.¹

Section 02Where change orders are born

The fixed price is a photograph of the project as defined on signing day. Change the subject, and you pay for a new photograph.

Section 03The three interfaces that decide the budget

On-site power retrofits fail at seams, not centers. Three seams dominate:

The utility seam. The tie-in to your switchgear and the utility's requirements around it, protection, metering, witness testing, outage windows, is jointly owned by you, the EPC, and the utility, which means by default it is owned by no one. Assign it by name in the contract: who applies, who attends, who pays for utility-driven changes, and whose schedule absorbs utility delay. An outage window missed because paperwork lagged can idle a crew for weeks at daily rates.

The operations seam. Retrofit construction happens inside a running facility. Tie-in outages, crane picks over occupied areas, energized-work boundaries under the electrical safety rules, and laydown space all interact with production.^2,3 The contract needs an outage plan agreed with operations before signing, not a clause promising to "coordinate."

The commissioning seam. The gap between "constructed" and "performing" is where projects quietly lose months. Define acceptance numerically: which tests, at which conditions, witnessed by whom, with which measured values constituting completion. Vague acceptance criteria convert your leverage into a negotiation after the contractor's crews have left.

Section 04Remedies, read honestly

Owners often treat liquidated damages and warranties as schedule and performance insurance. Read plainly, they are narrower instruments. Delay liquidated damages are a capped daily amount, frequently bounded at a small percentage of contract value, useful pressure, but rarely close to the business cost of a missed energization for a facility waiting on power. Equipment warranties remedy defects on the vendor's terms, repair or replace, not your consequential losses. Bonds and parent guarantees address contractor failure, not contractor slowness.

The honest planning posture follows directly: build the schedule so the remedies are never the plan. Realistic float around the utility and permit milestones, equipment ordered against verified lead times, and an owner's representative reviewing progress monthly are worth more than any damages clause you will ever negotiate. The remedies are the airbag, not the brakes.

Reading the change-order file before you sign

There is one diligence request that predicts EPC outcomes better than any reference call, and almost no owner makes it: ask each finalist for the change-order history of their last three comparable projects, anonymized as needed, as a percentage of original contract value and categorized by cause. Contractors track this internally with precision, because it is their margin story. A builder whose recent projects ran low single-digit change percentages, concentrated in owner-requested scope, is telling you their bids are complete and their site investigations real. A builder whose projects ran into double digits, concentrated in differing conditions and design gaps, is telling you their fixed price is an opening position. Some will decline to share; declining is also information.

The same conversation is the right moment to fix the economics of the changes you cannot prevent. Three instruments, all cheap while competition still exists: unit rates for the predictable variables, trenching by the foot, conductor by the length, rock by the yard, so discovered quantities reprice at bid-tension prices rather than monopoly ones; a markup cap on change-order overhead and profit, stated as a percentage in the contract; and allowances for the known-unknowns, a named budget for, say, utility-driven protection changes, spent only as invoiced, returned if unspent. Allowances are sometimes criticized as soft scope, but used honestly they are the opposite: they move a risk everyone can see from the padding inside a lump sum, where you pay for it whether or not it happens, into a transparent line where you pay only if it does.

Finally, agree on the change-order process itself as if you will use it weekly: who can direct a change, in what form, priced within how many days, approved by whom, with work never proceeding on verbal instructions. The most expensive words on a construction site remain "go ahead, we'll paper it later." A one-page protocol, signed with the contract, retires them.

Section 05The owner's pre-signing checklist

• Scope definition an outsider could price. If a second contractor could not bid your package without a week of questions, the package is not done, and the price you get will prove it.
• A load basis and utility file in writing. Interval data, the interconnection status, and the utility's written requirements, attached as exhibits, not described from memory.
• Named seam owners. Utility, operations, and commissioning interfaces each assigned to a person, with the money consequences of each seam written down.
• Numeric acceptance criteria. Tests, conditions, witnesses, values. The sentence "commissioning to industry standards" is a future argument, prepaid.
• A change-order protocol with prices in it. Labor rates, markup caps, and approval authority agreed while you still have alternatives.
• Independent review. An owner's-side engineer or advisor who reads the package with no stake in the construction margin. The review costs a rounding error against the first avoided change order.

None of this is legal advice, and a construction contract deserves construction counsel. What an owner's-side study contributes is upstream of the lawyers: a scope defined from measured data and documented utility facts, so the fixed price you sign is a photograph of a project that was actually in focus.