Guidance I found so far:
Petitiion I-130
Where to File: A petitioner residing in the United States should file Form I-130 at the Service Center with jurisdiction over the petitioner's place of residence.
Petition I-485
Where to File:
Effective December 1, 2004, if you live in Alabama, Arizona, Arkansas, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Illinois, Indiana, Kentucky, Louisiana, Maine, Massachusetts, Michigan, Minnesota, Mississippi, Nevada, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming, as well as the District of Columbia, Guam, Puerto Rico, and the Virgin Islands of the United States, you will need to mail your application to:
U.S. Citizenship and Immigration Services
P.O. Box 805887
Chicago, IL 60680-4120
Or, for non-United States Postal Service (USPS) deliveries (e.g. private couriers)
U.S. Citizenship and Immigration Services
Attn: FBASI
427 S. LaSalle √ 3rd Floor
Chicago, IL 60605-1098
If you live in any other state than those listed above, file your Form I-485 at your local USCIS Office (except if you are in the Baltimore District - then file at the Vermont Service Center.) NOTE: Some offices accept Form I-485 only by mail. Please check with your local USCIS Office for local filing procedures.
I-130 should be send to California service center.
To file both forms concurrently the beneficiary should reside in US.
And again –> CSC, since the Chicago box is only for the east coast applicants.
Based on above, I presume it's chicago and not just close by district office or suboffice?
