Multi-Prime Contracting
The owner contracts directly with several trade primes instead of one GC.
Quick Answer
Multi-prime contracting is a project delivery approach in which the owner holds separate prime contracts with several contractors, such as general construction, mechanical, electrical, and plumbing, rather than one general contractor. Coordination falls to the owner or its construction manager. It can reduce GC markup but increases coordination, scheduling, and scope-gap risk for the owner.
The Full Picture
Multi-prime contracting exists for two main reasons: some owners want to eliminate a general contractor's markup on major trades, and some public jurisdictions have historically required separate prime contracts for certain trades. New York's Wicks Law is the best-known example, requiring separate prime contracts for plumbing, HVAC, and electrical work on many public projects above set thresholds.
Mechanically, the design is divided into multiple contract packages, each bid separately and awarded to its own prime contractor. No single contractor controls the site. The owner, often through a construction manager acting as agent, is responsible for scheduling, sequencing, coordinating interfaces, and resolving disputes between primes.
In practice, the dividing lines between packages become the main risk. Every scope boundary, such as who provides blocking for mechanical units or who cuts and patches for electrical work, must be defined in the documents. When a boundary is unclear, each prime can reasonably price it out, and the owner inherits the gap.
For preconstruction, multi-prime work means scope definition moves from the GC to the owner's team. Package writers must assign every item to exactly one contract, and bid review has to check each prime's exclusions against the other packages, not just against its own scope.
Real Examples
Common Misconceptions
People assume: Multi-prime contracting always saves money by removing the GC's markup.
Actually: The owner saves the markup but takes on coordination cost and risk. Interface disputes, schedule conflicts between primes, and scope gaps between packages can easily offset the savings.
People assume: A construction manager in a multi-prime project carries the same risk as a GC.
Actually: Usually not. In the typical multi-prime setup the CM acts as the owner's agent, advising and coordinating without holding the trade contracts or guaranteeing cost, so the owner keeps the risk.
Frequently Asked Questions
What is multi-prime contracting?
Multi-prime contracting is a delivery approach where the owner signs separate prime contracts with several contractors for different parts of the work, instead of one contract with a general contractor. The owner, or a construction manager acting for the owner, coordinates the primes.
Why do owners use multi-prime contracts?
Some owners want to avoid a general contractor's markup on major trades or maintain direct control over specialty contractors. Certain public jurisdictions have also required separate prime contracts by law, such as New York's Wicks Law for plumbing, HVAC, and electrical work.
What are the risks of multi-prime contracting?
The main risks are scope gaps and overlaps between packages, schedule conflicts between primes that do not answer to one another, and disputes over interfaces. The owner carries these risks because there is no single contractor responsible for the whole project.
How does multi-prime differ from CM-at-Risk?
In CM-at-Risk, one construction manager holds all trade subcontracts and guarantees a maximum price. In multi-prime, the owner holds the trade contracts directly, and any CM involved usually acts as an advisor or agent without taking on cost risk.