Here we go...


http://www.catastro.meh.es/esp/servicios_destacados1.asp#menu5_7

Go down near the bottom of the page, in section 4.7. Just above the Google Earth image is a link to the install.

I haven't run it again now as I'm already installed. When you install it you may need to activate it by checking the box in the 'places' list at the left. you can turn it off there when it gets in the way.

To use it, just hover over the area of interest and a big refresh icon shows (eventually). Click on coloured squares and select the Cadastral number that comes up. A new window gives you the Cadastral data. The Google map also shows the outline of the parcels and location of buildings.

Happy hunting.  :)