There is, and will continue to be controversy regarding high tension wires, and whether they are potentially harmful or not.
Many years ago when this became a hot button topic, in my town, which has wires running through some neighborhoods, they did a a lot of investigation and had a number of scientific studies done....even held town meetings as there are wires running near an elementary school.
Nothing conlcusive, indicating danger, was found.
Many scientitsts say we are exposed to more "rays" (simple word to use, although not scientific) from our hair dryers and microwaves than from proximity to those wires.
Just as an FYI - you can call and have PSE&G or Jersey Central come in and take a reading .
So.......The jury is out with any kind of definitive answer.
Putting scientific studies aside - for a buyer - the real issue is perception.
Homes near or under those wires do sell for less.
However, they DO sell, and usually, in my experience, the buyer gets a lot more house for the money than if the home were located on a different street.
So.......do your due dillgence.......understand that you should be getting a really good, discounted price for that home,
When you go to sell in the future, you may have more challenges, and will really need to price the home accordingly.
There are buyers who won't get out of the car to see the home once they are told the wires are there -but....... there are also buyers who are not concerned about it, and appreciate they will be getting a good buy.
It's a personal decision.