Dogwood tree

[Spooky33]

I truly need some help with a rather large (15 foot) dogwood tree growing on the edge of my lilac tree.
I did speak to a nursery specialist about removal and I was told that if there is a good root ball made, it can be done and relocated to new spot.
Can anyone advise me further? I do not wish to harm either tree but clearly, the Dogwood tree is taking over the lilac bush...
Any and all advice is most welcome.
Thank you

 

[John Paul Sanborn]

Depending on the size, the lilac may be easier to move. They are more forgiving.

I would coppice the lilac this year in dormancy then dig and move it dormancy the one year latter.