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FB1 – Family Based Immigration for Unmarried Sons and Daughters of US Citizens

Basic Requirements:

Unmarried sons and daughters of U.S. Citizens, who are also 21 years old or older, are eligible under the family-sponsored first preference. To be considered “unmarried,” an individual must never have been married to begin with or has been divorced or widowed. The U.S. citizen parent of a qualifying unmarried son or daughter may petition for his or her green card under this immigration preference category. Since they are no longer considered dependent children (because they are at least 21 years old), these individuals do not qualify as an immediate family member of their U.S. citizen parent. With only 23,400 visas available annually under their preference, including any visas unused by the forth preference category, there is typically a long waiting list for this first preference. While the waiting time does fluctuate, individuals waiting for a green card under this preference should expect to wait around seven years after initially filing their petition. However, anyone immigrating from the Dominican Republic, Philippines, Mexico, China, or India should expect to wait even longer that the seven years.

Family Members:

Once an unmarried son or daughter of a U.S. citizen gains a green card, his or her children (those under 21 and unmarried) will be eligible as derivatives permanent resident status (green card). As such, children may accompany successful applicants into the United States.

Application Process:

There are two steps in the application process for this immigration preference category. To get the process started, a U.S. citizen parent must file a petition on behalf of their unmarried child (who is 21 or over). After the petition has been successfully filed, the USCIS will issue the applicants with a priority date. Once that date is reached, indicating that a visa has become available for this immigration category, the daughter or son (accompanied by their immediate family) may initiate the next step. Should the applicant already be legally in the United States, he or she may adjust his or her status. Alternatively, should the applicant be outside of the U.S., he or she would need to apply through consular processing.


At the Law Office of William Jang, PLLC, our immigration lawyers typically charge the following in attorney’s fees when filed in the United States at the USCIS (United States Citizenship and Immigration Services) (please read this disclaimer), in addition to the filing fee that is currently charged by the USCIS:

[Step 1]

  • $750 in attorney’s fees for the immigration petition.
  • $420 for the US CIS immigration petition filing fee

[Step 2]

  • $1,500 in attorney’s fees per immediate family for adjustment of status.
  • $1,070 per each person ($635.00 for each person under 14 years of age if applying with parent) accompanying the applicant

*The quoted prices are for individuals who are already in the United States and who need to file for an Adjustment of Status. If applying from outside of the U.S., a different set of fees will be charged.


At the Law Office of William Jang, PLLC, our Austin-based immigration lawyers are extensively experienced in immigration law and with the representation of family members of U.S. citizens who wish to obtain green cards. Please take a look at a sample of approved cases we have handled.

What do we need to get started?

Information and Documents needed for FB1 – Unmarried Son or Daughter of US Citizen
Sample Retainer Agreement

What Our Clients Are Saying

Marco Blazquez
Marco Blazquez Dec 05, 2018

It is my greatest pleasure to give my sincere gratitude to Mr. William Jang and his staff. We received my wife’s and stepson’s ten year green cards today and we could not have done it without the expertise, detail and sympathy of this law firm. Mr Jang and his associates are by far the most... Read More

Huc P.
Huc P. Nov 01, 2018

Great experience! Immigration processes can be complicated and at times confusing. The Law of Office of William Jang, offered tremendous amounts of information, answered all my questions and if I had any issues or concerns they were very prompt in getting back with me with a clear solution. I will... Read More

Rosario kennedy
Rosario kennedy Oct 16, 2018

We would like to thank Mr. William for representing us we are highly satisfied with the quality of service and the end results, he and his staff are highly knowledgeable and very professional, we recommend mr. William for you legal representation.

Tyler Hernandez
Tyler Hernandez Oct 09, 2018

Great service, and always got a prompt answer when I needed it. Highly recommended.

Heathe Kumar
Heathe Kumar Sep 15, 2018

William Jang and his staff walked us through the entire green card process and helped prepare us for the green card interview. Our case wasn’t completely easy because of difficulties getting my husband’s birth certificate from his home country’s corrupt government but William Jang helped us... Read More

Huc P.
Huc P. Aug 22, 2018

Great experience! Immigration processes can be complicated and at times confusing. The Law of Office of William Jang, offered tremendous amounts of information, answered all my questions and if I had any issues or concerns they were very prompt in getting back with me usually with a clear solution.... Read More

Matthew & Doris
Matthew & Doris Jul 01, 2018

My wife has her green card in hand and William Jang and his crew were there for us every step of the way. William is a top notch, calculated, down to business professional and you would be hard pressed to find another attorney who could match his strength of character and attention to detail. A+... Read More

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Law Office of William Jang, PLLC Law Office of William Jang, PLLC William Jang
314 E Highland Mall Blvd #406 Austin TX 78752 (512) 323-2333