I paid around $700 to have the torsion bar and both cables replaced around 5 years ago. Standard 2 car garage.
Yes, call a few places. You'll want to have some measurements handy (just guessing - door width, wood/metal door, spring length (probably standardized though), etc) and they can give you a cost over the phone.going to call a few places tommorow and see.
I don't think it will be that high but better to be prepared for a higher amount ! Garage door service work is amazingly inexpensive, in my experience but that said, if a competent professional will make an on-site service call to my house and do a repair including parts for under $300, I'm happy !! I don't question how long the service takes or if they can do the work quickly.250-300
Words well spoken - for most homeowner.I have installed the springs in my younger days but It is wiser to pay a pro , get heavy duty springs and pay for the install by a pro. It is much cheaper that an emergency room visit and the cost of the surgery to sew up you hand/ time off work etc.. I had a friend try to do it ,lacking the mechanical ability and his had was severely damaged. Yes Severely damaged.
Perhaps. I've done it five times on my own doors and three times for friends, if the door is large and heavy then yes it's more likely you could get injured if you're careless. But on lightweight aluminum doors the tension just isn't that high and it's really not very dangerous.Words well spoken - for most homeowner.