Garage Door System GuideGarage door springs carry the full weight of the door and wear out on a predictable cycle. This Old House reports that replacing a garage door spring typically costs $300 to $540 depending on the spring type and system. DASMA, the trade association for door manufacturers, warns that these springs sit under high tension and should be handled only by a trained door systems technician.
Torsion vs Extension Springs
Garage doors use one of two spring systems. Torsion springs mount horizontally on a shaft above the door opening and store energy by twisting. Extension springs run along the horizontal tracks on either side of the door and store energy by stretching as the door closes.
The two systems differ in cost and in how they wear. According to This Old House, extension springs tend to be the cheaper system to replace, while torsion springs cost more because they use more durable components and require careful tension adjustment. Both systems age on a cycle basis, where one cycle is a single open-and-close of the door.
The practical takeaway is that the spring type already installed on your door usually determines the replacement path. Matching the correct spring size and cycle rating to the weight of the door is part of what makes this a technical job rather than a simple parts swap.
What Spring Replacement Costs
This Old House puts the overall cost to replace a garage door spring at $300 to $540, with an average installed price of about $420. That figure bundles both parts and labor into a single installed price rather than breaking out an hourly rate.
Cost splits by spring type. This Old House lists extension springs at $300 to $400 installed, with the parts themselves running $20 to $60, and torsion springs at $350 to $540 installed, with parts running $80 to $120. The higher torsion figure reflects the sturdier hardware and the added tension work involved.
Spring failure often travels with related wear. For budgeting alongside a spring job, This Old House prices a garage door cable repair at $170 to $320 and a full opener replacement at $430 to $730, so it helps to have the technician inspect the whole system while the door is apart.
Safety: Why Spring Work Is a Pro Job
Garage door springs store enough energy to lift a heavy door, and that energy has to go somewhere if the spring or a bracket is released without control. DASMA states plainly that when the door is down, extension springs are under high tension, and that if a spring breaks, it may cause injury.
The tension is highest on the adjustment hardware. DASMA warns that the brackets involved are under extreme tension and should be adjusted or loosened only by a trained door systems technician, and that spring cables carry the same danger and should be replaced only by a trained technician. This is why torsion and extension spring work is treated as a professional task rather than a routine DIY repair.
The federal safety picture reinforces caution around garage door systems generally. The U.S. Consumer Product Safety Commission publishes guidance titled "Non-Reversing Automatic Garage Door Openers Are a Hazard," which urges homeowners to inspect the garage door and its hardware and to keep the system in safe working order. Taken together, the DASMA and CPSC guidance point to the same conclusion: leave spring tension to a trained technician.
When to Replace and What Else to Check
Springs give warning through behavior rather than a calendar date. Because This Old House rates a torsion spring at roughly 10,000 to 20,000 cycles, a door used many times a day reaches that count faster than one used twice a day, so cycle count matters more than age alone.
A spring job is a good moment to service the surrounding hardware. This Old House prices a garage door tune-up at $120 to $240, which typically covers lubrication, balance checks, and hardware tightening that extend the life of a new spring. Pairing the tune-up with the spring replacement can reduce repeat service calls.
Because the same high tension applies to cables and brackets, the inspection should be done by the technician doing the spring work rather than by the homeowner. This keeps the whole counterbalance system, springs, cables, and brackets, in the hands of someone with the correct tools and training.