After official released root tools by Sony for some version of Xperia z3, on the web is available new Xperia z3 root one click for z3, z3 compact and tablet series. Read more here: http://xperia-z3-root.blogspot.com/ or: https://archive.org/details/xperiaz3root or: http://www.everg0n.com/sony-xperia-z3-root-one-click-no-bl/

I hope this info will be usefull if you want to root Xperia z3 in home. Greetings.