Presumably what you have in that picture is a screenshot of a vector format file (EPS or PDF or AI), in which case great, you already have what you need.
Open it in Illustrator, clean up what you don't need, lock the layer, then create another layer and start drawing on top of the template.
When you're done, move the template layer (what you call the ...
Stop using the wrong tool. Use Illustrator first.
Ask for a PDF file of that blueprint. If it is drawn correctly that file IS your template. Just remove the lines you do not actually need.
Define a scale and draw internally a rectangle where you want your raster image, your Ps file.
You can make a clipping mask and put all the lines inside. Now Export ...