yea, sorry not even close.
It is way more complicated than that.
1. the tax value normally legs a lot. They are only update about once every 10 years, then it is a process that takes several years to do again on a region by region basis. The tax value almost never equals even the appraised liquid value. Don't ever try to use it for anything but tax purposes.
2. Once the new tax value is set, and the new tax rate is issued it can only be increased at a rate of 10% a year until it reaches the new rate. This is to stop sudden undo hardship on the owner. Even at that, the new rate can be contested. So, a property with a pending review might also have a different rate.
3. There are special exemptions for property zoned rural agricultural properties. Sometimes that includes properties well within what we would consider urban areas.
4. There is also special property tax exemptions related to the owners income level.
5. Even property zone agricultural property, typically can have up to three houses on it, not including barns and sheds without needing to be rezoned urban. So the buildings on property often are no indication of the zoning. For larger properties, it is often quicker to just subdivide and build and register another lot. Then you can build another three houses. On the other hand, properties can be rezoned urban that are a long way from any sort of civilization. I can think of several right off hand that are good 20 mins from any town we know about. The smallest that a property can be subdivided in most of Chile without being rezoned is 5,000 square meters from the designation rural agricultural property. I have also seen large buildings (a 5 story school comes to mind ) in the center of cities in Chile, that the renters got some big surprises when they turned out not to be zoned for commercial purposes because the real estate agent lied to them and they failed to check.
So, for all the above reasons (I am sure I am missing more than a few also) two properties that are exactly equal in every way on the surface and located right next to each other, might have completely different property tax rates. Best to request the property tax certificate on the particular property in question.
The good news, is that for the most part, property tax in Chile is really low no matter what witchcraft the IRS is using to determine the payment.