Pricing Deep-Dive · Updated 14 November 2026
Extension Spring
Replacement Cost
The stretched springs that run alongside the horizontal tracks, one on each side. What replacing the pair costs, what the published guides say, and the safety cable the door industry says every extension spring needs.
Headline number: $130 to $350 installed for a pair of extension springs on a 7 ft door of 100 to 200 lb, parts, labor and service call included. Replace both together, and make sure a safety cable runs through each spring.
Our estimate, not a quote: spring prices from DIY Garage Door Parts, labor from Yelp's cost guide, safety guidance from DASMA, all read 14 October 2026.
How we price this: Our ranges are estimates built from published inputs, not quotes: retail spring prices, the service-call and hourly rates in Yelp's cost guide, and job times from HomeAdvisor and Yelp. Low ends are rounded down and high ends up to the nearest $5. Sources, first read 13 October 2026 and re-read 14 October 2026: DIY Garage Door Parts, extension springs, Yelp cost guide, HomeAdvisor and DASMA, Safety Tips for Garage Doors. HomeAdvisor and Angi are both owned by Angi Inc., which pays this site a commission for quote requests. (Angi Inc. 2025 Form 10-K)
Show the arithmetic
- Pair of extension springs replaced (pair; estimate from stated inputs; includes parts, labor, service call): $130 to $350. parts 2 x $29.92 to 2 x $72.90, plus labor $75 to $200 (a $75 to $100 service call covering the first hour, plus up to one more hour at $100): $134.84 to $345.80, rounded out to the nearest $5.
- Extension spring, part only (per spring; quoted; includes parts): $29.92 to $72.90. DIY Garage Door Parts, springs for 7 ft doors rated 100 lb ($29.92) to 200 lb ($72.90).
- Labor and service call for one visit (per job; estimate from stated inputs; includes labor, service call, minimum labor): $75 to $200. $75 service call when the job fits in the first hour (HomeAdvisor: two springs in 30 minutes to one hour); $100 service call plus one more hour at $100 when it runs to about two hours (Yelp): $75 to $200.
Parts are priced at what the two suppliers charge the public. Installers buy for less and many mark parts up, and neither figure is published, so a quote's parts line can be higher than ours.
Wage check: The BLS puts the median mechanical door repairer (the occupation that includes garage door mechanics) at $26.79 an hour (May 2025). Wages are 70.0% of private-industry employer costs (June 2026), so that technician costs an employer about $38.27 an hour before the van, insurance, overhead and profit. Yelp's $40 to $100 hourly rate sits at or above that cost, which is what a billed rate should do. (BLS OEWS, 49-9011 Mechanical Door Repairers; BLS Employer Costs for Employee Compensation)
What the guides say
| Guide, word for word | Pair installed |
|---|---|
| HomeAdvisor: "Extension springs cost $50 to $100 per spring to replace, including labor and materials."Unit: per spring, installed. Doubled for a pair. HomeAdvisor does not say whether a second spring on the same visit costs the full figure again, so this may overstate a pair. | $100 to $200 |
| Yelp cost guide: "A pair of new extension springs costs about $40–80; labor for replacing them typically runs $130–160."Unit: pair: parts and labor quoted separately. Parts plus labor, added. Yelp's own FAQ gives the same total: "Replacing both costs about $170–240." | $170 to $240 |
| CostInspector: "Extension springs run $150 to $350 a pair."Unit: pair, installed, before a separate service call fee. As published. CostInspector cites no sources. | $150 to $350 |
| Our estimate: two springs at retail plus one visit of laborUnit: pair, installed, service call included. Arithmetic under "Show the arithmetic" above. | $130 to $350 |
All three guides read 14 October 2026. They differ mostly in what they include: per spring or per pair, with or without a service call. Our range is wider at the top because it allows up to two hours of labor at Yelp's top rate and the dearest 7 ft spring we price.
What extension springs are
Extension springs stretch rather than twist. There is one on each side, running along the horizontal track, and they stretch as the door closes and pull as it opens. Yelp's cost guide says they are "used with older-style, one-piece tilt-up garage doors (usually in pairs, with one spring on each side)". If you see one spring, or two, on a shaft above the door instead, you have torsion springs: see torsion spring replacement cost, or torsion vs extension for the two side by side.
Cost breakdown for the pair
Parts: $59.84 to $145.80 for two springs at DIY Garage Door Parts, whose extension springs for 7 ft doors rated 100 lb and 200 lb cost $29.92 and $72.90 each. Labor and service call: $75 to $200 on Yelp's published rates, the same visit as any spring job. Total: $130 to $350. The same store lists extension springs for heavier and taller doors, up to 450 lb and 8 ft, at higher prices; our range covers 7 ft doors of 100 to 200 lb only.
Compared with a torsion pair, $145 to $520 on the same basis, an extension job is a little cheaper because the springs are. The labor is the same visit. Missing or rusted safety cables, worn pulleys or frayed lift cables are separate lines: ask the technician to show you the worn part and price each one separately. See also spring and cable replacement cost.
The safety cable is not optional
DASMA, the Door and Access Systems Manufacturers Association: "If your garage door has extension springs, you need a safety cable that runs through the spring and secures to the wall or ceiling at each end. When your garage door is down, extension springs are under high tension. If the spring breaks, it may cause injury. A safety cable can keep that broken spring contained."
And if yours have none: "If you have extension springs but do not have a safety cable, call your local dealer for a safety inspection." A spring replacement is the natural time to have cables fitted. We found no published price for safety cables that we could verify, so ask for them as their own line.
Replace both springs
Yelp: "If one extension spring breaks or loses tension, both should be replaced." The two springs balance the door from each side, and they have worked through the same cycles. Prime-Line rates its extension springs at 10,000 cycles. The same logic for torsion doors is on our cost when one spring breaks page.
Converting to torsion springs
The guides quote a conversion at well above a like-for-like pair: HomeAdvisor: "Converting from extension to torsion springs costs $400 to $800."; CostInspector: "Conversion runs $300–$600.". HomeAdvisor adds that it "can be a good investment if you're concerned about the lack of safety cables on extension springs." Fitting safety cables to the springs you have also answers that concern, so ask for both prices. We do not give a conversion range of our own: we found no published parts list for a conversion to price.
A torsion system needs room above the door for the shaft and springs, so ask the technician whether your garage has it before you compare prices. Once converted, future replacements are torsion jobs: $145 to $520 for a pair on our estimate, as on the double-spring page.
What to ask the technician
- Are you replacing both springs as a pair? (Yelp: both should be replaced.)
- Is there a safety cable through each spring, and if not, what does fitting them add as a separate line?
- What door weight are the new springs rated for, and how did you check it?
- Are the pulleys and lift cables in good condition? Show me any part you want to replace.
- If you recommend converting to torsion, what is that as a separate quote, and does my garage have room for it?
- What is the warranty on the springs and on the labor, in writing?
Related cost guides on this site
Frequently Asked
How much does it cost to replace extension springs?
$130 to $350 for the pair on our estimate, parts, labor and service call included, for a 7 ft door of 100 to 200 lb. The springs are $29.92 to $72.90 each at DIY Garage Door Parts; the rest is one visit of labor. The guides: HomeAdvisor $100 to $200 a pair, Yelp cost guide $170 to $240 a pair, CostInspector $150 to $350 a pair, each converted as the table on this page shows.
Are extension springs cheaper to replace than torsion springs?
A little, on our estimate: $130 to $350 for an extension pair against $145 to $520 for a torsion pair, with the same labor. The difference is the springs: $29.92 to $72.90 each for the extension springs we price, $35.38 to $157.94 for torsion springs.
Do extension springs need safety cables?
Yes. DASMA: "If your garage door has extension springs, you need a safety cable that runs through the spring and secures to the wall or ceiling at each end. When your garage door is down, extension springs are under high tension. If the spring breaks, it may cause injury. A safety cable can keep that broken spring contained." If yours have none, DASMA says to call your local dealer for a safety inspection.
Should I convert from extension to torsion springs?
It costs much more than a like-for-like pair. HomeAdvisor: "Converting from extension to torsion springs costs $400 to $800." CostInspector: "Conversion runs $300–$600." HomeAdvisor adds that the change "can be a good investment if you're concerned about the lack of safety cables on extension springs." Against that, our like-for-like extension pair is $130 to $350.
How long do extension springs last?
Prime-Line, a spring maker, rates its extension springs at 10,000 cycles, one opening and one closing each. That is the same as a standard torsion spring: DDM Garage Doors says those are designed around a minimum of about 10,000 cycles. Torsion springs also come in high-cycle grades; Prime-Line lists its extension springs at 10,000 only.
Can I replace extension springs myself?
No. DASMA (the Door and Access Systems Manufacturers Association) says on its garage door safety tips page that "spring systems are dangerous and should be repaired only by trained professionals," and that applies to extension springs as well as torsion springs. DASMA notes that extension springs are under high tension when the door is down and a broken one may cause injury. Hire a trained garage door technician.
FAQ sources, read 14 October 2026: DASMA, Safety Tips for Garage Doors, Prime-Line, sectional garage door extension springs (GD 12194 series), HomeAdvisor, Yelp cost guide, CostInspector and DIY Garage Door Parts, extension springs.