About My House

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505_n_alta_vistaLooking to find out more about your home in Monrovia? There are many resources to help you discover information about your property!

The Los Angeles County Assessor provides general information regarding your parcel and the buildings on it.

Building permits can be found online using the OnBase Document Portal. 

*Note that OnBase requires the use of Internet Explorer and pop-up blockers must be turned off.

  • Search with key words to find building permits or peruse the folder list to find the documents that interest you.  
  • Use the * as a wildcard for searches
  • Click the binoculars to start your search
  • Click the Door (top left area) to logout when you are done

For older building permits from 1911 through 1947, check out the Permit Book.

And, finally, there are nearly 150 historic landmarked homes in Monrovia!  

Monrovia is filled with historic homes of many styles, from Victorian and Craftsman to Revival and Cottage.  

For a list, map, and photos of historical homes in Monrovia, visit the Monrovia Historic Preservation Group website.

Learn more about the landmarking process here.