Ductwork Installation & Fabrication in Washington

Ductwork installation in Washington typically costs between $3,000 and $8,000 for standard projects, and $4,000 to $10,000 for larger homes or more complex layouts. The final price depends on the total linear footage of ductwork needed, the number of supply and return runs, accessibility of the installation space (crawl space, attic, between floors), and any structural modifications required to route the ducts properly.

In-house custom sheet metal fabrication gives us complete control over fit, quality, and timeline. Many HVAC companies subcontract their ductwork to third-party sheet metal shops, which adds cost, introduces scheduling delays, and creates a gap in accountability. When one company builds the ducts and another installs the equipment, quality can suffer. We fabricate every piece to the exact dimensions of your home, ensuring tight seams, proper sizing, and maximum airflow efficiency from a single accountable team.

We use commercial-grade galvanized sheet metal for all trunk lines and main runs. This is the same material used in commercial HVAC installations. It is more durable, more rigid, and handles airflow more efficiently than the flex duct that many residential HVAC companies default to. All joints are mechanically fastened, sealed with mastic, and wrapped with insulation to prevent air leaks, condensation, and energy waste.

Common signs include rooms that are consistently too hot or too cold despite a working HVAC system, visible damage or disconnections in accessible duct sections, excessive dust coming from vents, whistling or rattling noises from the ducts, high energy bills, and ductwork that is more than 20 to 25 years old. We can inspect your existing ductwork and determine whether repair, modification, or full replacement is the most cost-effective option.

Yes. All ductwork installations are permitted and inspected to meet or exceed Washington State building code requirements. We handle the entire permitting process and coordinate building inspections so you do not have to deal with the paperwork. Proper permits protect you as a homeowner and ensure the work meets safety and efficiency standards, which is especially important if you sell your home in the future.

Absolutely. When installing a new heat pump, furnace, or AC system, the existing ductwork frequently needs modifications to handle different airflow requirements. New heat pumps, for example, often require larger return air pathways than older furnaces. We evaluate your current duct system during the HVAC assessment and include any necessary modifications in the project scope to ensure your new equipment operates at peak efficiency.

A full ductwork installation for a typical home takes 2 to 4 days depending on the size and complexity of the layout. Simple duct modifications or partial replacements may be completed in 1 to 2 days. When ductwork is being installed alongside new HVAC equipment, we coordinate both scopes to minimize disruption and complete the entire project as efficiently as possible. We provide a clear timeline before starting any work.