Draw a shape around your site and export to .kml
Sign in to mymaps.google
+Create a new map.
Search or navigate to your site.
Change 'base map' to Satellite.
(Desktop - drop down on bottom of dialog).
(Mobile - the dialog is under legend).
Use the line tool to draw a rectangle around the site.
Optional, rename map and layer to descibe your site.
From site menu, the three vertical dots, export kml, select layer to export (not map) tick kml, download.
Tell us about the project ?
What do you require, do you have specific deliverables ?
What is your timeframe ?