Almost nobody in this trade publishes prices, which is why the first thing most homeowners want after a spring goes is simply a number they can plan against. So here it is, and then the reasoning behind it.
A single torsion spring fitted in Carlsbad is an estimated $215 to $425. A matched pair on a double door is an estimated $325 to $545. An extension spring pair on an older door is an estimated $185 to $325.
Why it has to be a range
A spring is not a stock item with one price, and this is the honest reason nobody can quote you a firm figure over the phone.
The correct replacement is determined by four measurements taken off the spring on your door, read against the weight of the door itself: wire gauge, the inside diameter of the coil, the relaxed length, and the direction it was wound. A light single door in Carlsbad Village and a wide insulated double in Aviara are genuinely different parts at genuinely different costs.
Anybody quoting a fixed spring price sight unseen is doing one of two things: guessing at the wire size, or quoting the cheapest spring they stock with the intention of revising the figure once somebody is standing in your garage. Neither is what you want.
What is inside those figures
The band covers the spring, the labor, rebalancing the door by hand with the opener disconnected, and resetting the opener's travel and force limits to how the door now moves.
The diagnosis is absorbed into the job when the work goes ahead on the same visit, rather than added on top. And the visit ends with the reversal proved against a flat board on the slab, because the force settings that safety system relies on are calibrated to a balanced door, and new springs change the balance.
If any of those steps are missing from a cheaper quote, the quotes are not comparable. A spring fitted without rebalancing and resetting the opener is a job half done, and the half that was skipped is the half that protects the opener you already own.
The two upgrades that actually pay
Cycle rating. A 10,000-cycle builder spring lasts roughly seven to twelve years at four or five openings a day. Stepping up to 20,000 or 25,000 cycles adds an estimated $70 to $140 and roughly doubles that. On a door used as the family entrance, which in most Carlsbad houses it is, that pays for itself the first time it does not break.
The coating, if you are near the water. This is the Carlsbad-specific one. A properly galvanised spring costs more than a plain oil-tempered one and resists the corrosion pitting that is genuinely shortening spring life on the coastal side of the city. On a Terramar or Village door it is money well spent. On a Bressi Ranch or Vista door the benefit shrinks considerably, and a company that recommends it everywhere is not paying attention to your address.
Why both springs on a two-spring door
Because both were fitted on the same day, have taken the same cycle count, and near the coast have had the same corrosion exposure. The one that has not broken is next rather than better, usually within months.
There is a mechanical reason as well. Uneven tension across the shaft racks the door in its tracks and grinds garage door rollers on the low side. Doing the pair while the shaft is already de-tensioned costs a fraction of a second call-out.
Coastal springs cost more per decade, not per spring
This is the part that does not show up in a single quote and matters over the life of the door.
Fatigue cracks start at surface imperfections. Corrosion creates surface imperfections. Chloride in onshore air pits the wire, each pit concentrates stress where smooth steel was assumed, and the spring reaches the end of its fatigue life before its rated cycle count.
You can see it on your own door without touching anything. Fresh spring steel is smooth and evenly gray. A spring that has lived in marine air goes matt, dull and faintly rough. That texture is why a beach-block Carlsbad door is on a shorter replacement cycle than the identical door in an inland valley, and it is a real cost of living near the ocean that nobody mentions when you buy the house.
What makes a cheap quote cheap
There are three usual answers, and they are worth knowing while you are still on the phone:
- The lowest cycle rating, and sometimes the nearest stock wire size rather than the correct one. It works, and it is back sooner.
- A number that covers arriving rather than the repair, with parts and labor appearing as a second figure once the door is apart.
- Plain galvanising on a coastal door, which is fine ten miles inland and short-lived three streets from the sand.
Ask what the cycle rating is, what the coating is, and whether rebalancing and resetting the opener are included. Three questions, and they turn an unhelpful price comparison into a useful one.
And the warranty
Ask for the parts and labor terms written on the estimate with a duration against each. "Standard warranty" with no length attached is not a warranty, it is a phrase. Shop supplies charged as an unspecified percentage is the other line that turns into an argument later.
None of that is unusual to ask for. California requires a written contract for home improvement work above $500, caps the deposit at $1,000 or ten percent of the contract price whichever is less, and gives you three days to cancel a contract signed at home, five if you are 65 or over. A contractor who treats those as optional is telling you something useful about the rest of the job.