Subcontractor
A specialized trade firm hired by the GC to perform one scope of a larger project.
Quick Answer
A subcontractor is a specialized trade firm hired by the general contractor to perform a specific scope of work — electrical, plumbing, drywall, or concrete, for example — rather than the entire project. Subcontractors contract with the GC, not directly with the owner, and typically bid competitively for their portion of the work during preconstruction.
The Full Picture
Subcontracting exists because modern construction requires deep specialization no single firm can maintain in-house. A GC would need licensed, equipped, experienced crews in every trade to self-perform a whole project — instead, the GC contracts out most scopes to firms that specialize in exactly that work and do it every day.
Mechanically, the GC breaks the project into bid packages by trade, following a standard scope structure like CSI MasterFormat, and solicits competitive proposals from qualified subcontractors for each package. The GC (or its precon team) reviews and levels those proposals — comparing scope, exclusions, qualifications, and price on an apples-to-apples basis — before selecting and contracting with a subcontractor for each package.
In practice, a subcontractor's proposal is built from its own estimate of the drawings and specs relevant to its trade, and it often excludes or qualifies items it interprets differently than the GC expects. Reconciling those differences — catching what's missing before award, not after — is the core discipline of subcontractor bid leveling.
For a GC's precon team, subcontractors are both an information source and a risk to manage: their proposals inform the GC's own cost picture, but an unleveled or incomplete sub bid becomes a scope gap the GC has to absorb or fight over during construction. Prequalifying subs on financial stability and past performance, alongside leveling their pricing, protects against both cost and delivery risk.
Real Examples
Common Misconceptions
People assume: A subcontractor works for the project owner.
Actually: Subcontractors contract with the general contractor, not the owner. The owner typically has no direct contractual relationship with subs, which is why disputes over a sub's work usually flow through the GC.
People assume: The lowest subcontractor bid is always the best one to accept.
Actually: A low bid that excludes scope or carries thin qualifications can cost more in the end through change orders. Bid leveling exists precisely to normalize scope across bids so price comparisons are actually comparable.
Does MeltPlan Solve This?
Partially — adjacentMeltPlan doesn't define or prequalify subcontractors, but it directly handles the work of evaluating their proposals: it levels every subcontractor bid for a trade package in minutes, surfacing scope gaps, exclusions, and qualifications so the GC selects a sub based on true, comparable scope — not just the bottom-line number.
Level subcontractor bids in minutes →Frequently Asked Questions
What's the difference between a subcontractor and a general contractor?
The GC holds the prime contract with the owner and is responsible for the whole project; a subcontractor is hired by the GC for one specific trade scope and has no direct contract with the owner.
How are subcontractors selected on a project?
The GC solicits competitive bids for each trade package, often from a prequalified list, then levels and compares those proposals on scope, price, exclusions, and qualifications before awarding the work.
What is a sub-subcontractor?
A firm hired by a subcontractor to perform part of that subcontractor's scope — for example, an insulation firm hired by the drywall sub. The GC's contract chain typically doesn't extend that far down directly.
Why does subcontractor bid leveling matter?
Because subcontractor proposals rarely arrive in identical scope. Leveling normalizes them so the GC compares true apples-to-apples pricing, catching gaps and exclusions before they become expensive surprises during construction.
What's a bid package in relation to subcontractors?
A bid package is the defined scope of work, drawings, and specs sent out to solicit competitive proposals from subcontractors for a specific trade — electrical, concrete, glazing — as part of the GC's overall bidding strategy.