This is a contemporary document.
The writer appears to be fluent in English. I don't know his/her ethnic background (or name). The handwriting itself provides no hints as to ethnicity (it's all printed caps, no crossed 7's, etc.)
The handwriting is very neat. No chance of it being a plus-minus sign.
The writer is involved somehow in the field of architecture, home-remodeling or construction, (I don't know precisely where/how.)

