What is a Subcontractor?
A subcontractor is a specialized tradesperson or company hired by a general contractor to perform a specific portion of a construction or renovation project. While the GC manages the overall project, subcontractors handle the individual trades: electricians, plumbers, HVAC technicians, roofers, framers, drywall installers, painters, tile setters, and concrete workers are all common subcontractors on renovation projects.
Subcontractors have a contractual relationship with the GC, not with the property owner. The GC hires them, manages their schedule, approves their work, and pays them. The property owner pays the GC, who in turn pays the subs. This chain of payment is important because disruptions in it — particularly when a GC doesn't pay subcontractors — can result in mechanic's liens on your property.
Why subcontractors matter to investors
Even if you hire a GC to manage your renovation, understanding subcontractors matters because they do the actual work. The quality of your renovation is the quality of the subs who perform it. A GC is only as good as the subcontractors they hire. When evaluating a GC, ask about their regular subs — do they use the same crews consistently, or are they constantly finding new workers? Consistent sub relationships indicate reliability and established quality standards.
Some experienced investors bypass the GC entirely and manage subcontractors directly. This saves the GC's markup (typically 15-25% above sub costs) but requires the investor to coordinate scheduling, manage the project timeline, handle permits and inspections, and ensure quality. It's a viable strategy if you have the time, knowledge, and local presence to manage construction, but it's a full-time job on anything beyond a light cosmetic renovation.
Lien rights
Subcontractors who aren't paid by the GC can file a mechanic's lien against your property, even though you paid the GC in full. This is one of the most dangerous scenarios in renovation investing. You pay the GC $80,000, the GC doesn't pay the plumber $8,000, and the plumber files a lien on your property. You may have to pay the plumber directly to clear the lien, effectively paying for the work twice.
Protection strategies: require lien waivers from all subs before making progress payments to the GC, use joint check agreements (where your check is made payable to both the GC and the sub), and verify that the GC has paid subs before making the final payment.