Definition
A Roman civil law term with two closely related meanings arising from the law of hire (locatio conductio):
(1) The product or output of work let out for another's use — that is, a thing produced or processed through contracted labor and delivered to the party who engaged that labor.
(2) The hiring out of work or labor to be performed upon a thing — the contractual arrangement itself by which a worker or craftsman undertakes to apply skill or effort to another's property or to produce a result.
The term belongs to the family of locatio conductio operis, one of the recognized forms of hire under Roman law, in which what is contracted for is a completed result (the opus, or work) rather than ongoing service. The party performing the work is the conductor operis; the party commissioning it is the locator. Opus locatum thus describes both the object of that arrangement and the arrangement itself, depending on context.
Common Confusion
Opus locatum is frequently encountered alongside opera locata and locatio conductio operis, and the distinctions matter. Opera locata refers to the hiring of services or labor generally — the worker's ongoing effort — whereas opus locatum refers to a discrete piece of work or its completed product. Locatio conductio operis is the broader contractual category encompassing both. In historical sources, writers sometimes use these phrases interchangeably or imprecisely; researchers should read surrounding context carefully before inferring which concept is actually in play.
Why It Matters in Research
Opus locatum appears almost exclusively in sources engaging with Roman civil law or in common law treatises that trace the historical roots of contract and bailment doctrine. It will not surface in American case law as a cause of action or operative legal standard, but it appears in scholarly and treatise writing on the law of work, hire, and what later common law would call contracts for services versus contracts for a result — a distinction with enduring doctrinal significance in employment, construction, and independent contractor law.
Researchers tracing the intellectual genealogy of the common law's distinction between a contract of service and a contract for services will find opus locatum useful as a conceptual anchor. The Roman law differentiation between locatio conductio operis (result-based hire) and locatio conductio operarum (time- or service-based hire) maps imperfectly but recognizably onto modern distinctions between independent contractors and employees, and onto the difference between service contracts and construction or production contracts.
A trap in historical sources: because Burrill's entry appears to be incomplete as preserved, researchers relying on Burrill alone may find the entry truncated. Black's and Rapalje & Lawrence provide the more complete dual-meaning formulation.
This term also connects to bailment research. When a thing is delivered to a craftsman for work to be done upon it and then returned, classical analysis treated this as a species of locatio conductio operis. Common law bailment doctrine absorbed and adapted this framework, and treatises discussing bailment for hire or work-and-labor relationships sometimes invoke the Roman terminology. Researchers moving between Roman law sources, early English equity or common law treatises, and modern contract doctrine should track this lineage carefully.
Historical Dictionary Support
Black's and Rapalje & Lawrence are in full agreement on both meanings and present them in nearly identical language, suggesting direct derivation from a common source or mutual influence. Both entries are compact, definitional, and non-analytical — they establish the term's meaning without situating it within a broader doctrinal discussion.
Burrill's entry, as available, begins with the Latin identification and classification ("Lat. In the civil —") but is truncated in the preserved text, preventing assessment of whether Burrill offered anything beyond the standard dual-meaning formulation. What survives confirms the term's civil law pedigree but adds nothing substantive.
None of the three historical dictionaries situate opus locatum within the fuller structure of locatio conductio or explain its relationship to opera locata and the distinction between result-based and service-based hire. Researchers needing that analytical context must go beyond these dictionary sources to Roman law treatises or to works on the history of contract doctrine.
Jurisdictional Note
Opus locatum has no operative jurisdictional significance in American or English law as a term of art applied in courts. Its relevance is doctrinal and historical. Louisiana, with its civil law heritage, is the most likely jurisdiction in which Roman law categories retain any residual analytical weight, though even there the term would appear in scholarly rather than applied legal writing.