Most power lines in the USA are built on "rights of way". This is a strip of land along the power line and to the sides where the power company have rights over the land use. No building is allowed on the ROW. Accordingly, the USA does not have homes right up close to power lines like the UK does.
There is some evidence that the homes closest to the power lines may be of higher socioeconomic status.
The UK
This page deals with the situation in the USA - see here for the equivalent page for the UK.