I am building a wooden garden gate for the rear of my house. It will bridge an existing 3-foot wide concrete walk which adjoins the garage. On the lock side of the gate I will use a 4x4 treated lumber and set it in a hole in the ground in concrete. On the hinge side, the gate needs to be attached to the house, there is no room for another 4x4 on that side of the gate. The bottom of this 2x4 will start six inches above the concrete walk.
I thought I would use a 2x4 and use lag screws to screw it to the side of the house. The 3' wide gate will fit between the 4x4 post set in concrete and the 2x4 attached to the house (garage).
Will this arrangement compromise building codes or cause complaints from termite inspectors when I sell the house? Of course, the 4x4 is treated lumber. Do I need to use treated lumber for the 2x4, too?
Thanks
Walter