3 Answers

You can do it yourself for about 100-200 dollars……...

Some states like California require a licensed contractor and a permit to replace water heater.

 Onsite water heaters run anywhere from $100.00 - $1500.00. .Depending if its gas or electric. If its electric ,it will require a 210 plug. If you do not have one then one  will need to be installed as well. It also depends on how many bathrooms, people in the home and water using appliances you have. ( The more people you have the more you will be using water at the same time; showers, dishwasher and laundry. You may need two(most likely not)  How much you pay a Licensed contractor  depends on you. You really do get what you pay for when it comes to contractors. Get quotes to make sure your getting  charged properly. BUT ,Check with your County  first and find out what the regulations are. I know it blows but the damage it can do to your house if it's not put in right is way more than what it would cost to have it done right the first time. If you look around you might be able to find a licensed contractor that does side jobs and can do it cheaper .