How to use measurements

I’m pretty new to using Unreal 4. I’m trying to start off small. I want to build a house. To get straight to it.
Is there a way I can enter in actual measurements: inches, feet, meters or square foot. I can highlight an object or a box and I see how I can edit using: X, Y, Z. It would be easier to enter in a measurement than guessing like I am now.

Editor units are in centimetres, so if you set something to be 100 x 100, it will be 1 meter by 1 meter.

You can change the unit in Project Settings, Editor, Appearance.

I changed units to feet in Appearance. It’s not changing the dimensions in the brush settings window. It is still in centimeters. What can I do to enable the settings? Thanks for the help!