Washington Specialty Contractor vs General Contractor for HVAC Businesses

The choice between registering as a specialty contractor or a general contractor shapes how your Washington HVAC business can operate — what projects you can bid on, whether you can hire subs, and how much financial security you need to put up. Most HVAC business owners default to the specialty classification because it's cheaper, but that choice comes with a restriction that catches many off guard.

Specialty Contractor Registration

When you register as a specialty contractor with L&I, you select one of the specialty classifications defined in WAC 296-200A-016 — for HVAC work, that's the "HVAC" or "Hvac/refrigeration" specialty. This limits your business to performing work strictly within that classification.

The financial requirements for specialty registration:

• Surety bond: $15,000 continuous (increased from $6,000 on July 1, 2024)
• General liability insurance: $250,000 combined single limit minimum
• Registration fee: $150.20 biennially

The Subcontracting Prohibition

Here's where specialty registration creates problems that most new HVAC business owners don't anticipate: a specialty contractor is prohibited from hiring subcontractors under Washington administrative rules.

If an HVAC project requires gas piping or plumbing work that your crew isn't qualified to perform, you can't subcontract that scope to a plumber or gas fitter. The work must be performed by your direct employees — people on your payroll with the appropriate certifications.

This restriction matters on projects that involve fuel conversions (requiring gas piping), hydronic heating systems (requiring plumbing connections), or combined mechanical and plumbing scope. If you're a specialty HVAC contractor and you hire a plumbing sub to run gas lines on your project, both you and the sub are in violation — L&I can issue citations to the specialty contractor for using subcontractors and potentially to the subcontractor if they're aware of the arrangement.

General Contractor Registration

Registering as a general contractor removes the subcontracting restriction. You can perform multi-trade projects and hire registered subcontractors to execute specialty scopes — including plumbing, sheet metal, structural framing, or primary electrical connections that fall outside your HVAC specialty.

The financial requirements are higher:

• Surety bond: $30,000 continuous (increased from $12,000 on July 1, 2024)
• General liability insurance: $250,000 combined single limit minimum (same as specialty)
• Registration fee: $150.20 biennially (same as specialty)

The bond is the main cost difference. A $30,000 surety bond costs roughly twice the annual premium of a $15,000 bond — typically $200-$600 per year for a clean record versus $100-$300 for the specialty bond. The exact premium depends on your personal credit and claims history.

How to Decide

Register as specialty if: You only do HVAC work, your projects don't require plumbing or gas piping by someone other than your own employees, and you want to minimize your bond costs. This covers most residential HVAC contractors who have their own crew handling the full scope.

Register as general if: You regularly manage projects that involve multiple trades, you want the flexibility to hire plumbing or gas piping subcontractors on HVAC jobs, or you're planning to grow into full mechanical contracting. The higher bond cost buys you operational flexibility that a specialty registration can't provide.

The Typical Growth Path

Many HVAC businesses start as specialty contractors — it's cheaper, simpler, and sufficient for straightforward residential work. As the business grows into commercial projects or combined mechanical packages, the subcontracting restriction becomes a bottleneck. At that point, you can file a modification with L&I to change your registration from specialty to general, which requires upgrading your surety bond from $15,000 to $30,000.

The registration switch itself is straightforward — submit the updated bond and pay any applicable fees. The harder part is that your surety company will re-underwrite the bond at the higher amount, which may require updated financials.

Bond Escalation Under Multiple Judgments

Regardless of which classification you choose, your bond requirements can escalate beyond the baseline if judgments are filed against your registration. Under WAC 296-200A-030:

• No judgments: baseline bond ($15,000 specialty / $30,000 general)
• 1 final judgment: escalated to $20,000 account balance requirement
• 2 final judgments: escalated to $30,000 account balance requirement
• 3+ final judgments: escalated to $45,000 account balance requirement

These escalation thresholds apply within a single registration cycle and replace the baseline account-balance requirement, creating a significant financial burden for contractors with multiple claims.

The Washington HVAC License Guide includes a contractor registration blueprint that walks through both paths — specialty and general — with the full bond, insurance, and administrator requirements for each, so you can make the right choice before you file.

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