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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

Robert Scalise
Robert Scalise Jun 03, 2019

When my wife was denied her visa I didn't have time to commit to several consultations. I researched local immigration lawyers and placed my bet on Mr. Jang and his staff. I could not have made a better decision. Every step of the way Mr. Jang went out of his way to ensure that he was delivering... Read More

J A May 22, 2019

Great handle my case promptly.

Nishita Muhnot
Nishita Muhnot Apr 28, 2019

Mr. Jang was very knowledgeable, meticulous and good with his work. I applied to have conditions removed on my green card and it was a tricky case. My case was approved. He always swiftly and patiently answered all my queries. Above all, I found him to be genuinely helpful and a good human being.

JUNSIK Choi Apr 04, 2019

Mr Jang is a great attorney. He worked on my N400 applications and went through all documents very carefully and finally got approved. I really appreciate his efforts for that.

Chunlin Wang
Chunlin Wang Mar 02, 2019

We are totally impressed with Mr. Jang, Ms. Natalia, and the rest of staff. They are honest, knowledgable, and very thorough. We had dealt with the immigration process (years ago) and had experience with immigration attorneys. Mr. Jang clearly stands out. He explains everything in details and set... Read More

Nazini Khader
Nazini Khader Feb 21, 2019

It was great working with Mr.Jang. The whole process was smooth and he paid attention to every minute detail. I would recommend Mr Jang.

Maurice Alexander Clepkens
Maurice Alexander Clepkens Feb 18, 2019

Mr. Jang and his staff were wonderful! I was fairly nervous about the process I was embarking on (adjustment of status), but Mr Jang was very thorough and paid a lot of attention to detail, as well as explaining everything clearly. I can't thank them enough for guiding me to success. And another... Read More

Yanitza Gutierrez
Yanitza Gutierrez Jan 30, 2019

From the start i got told the case was going to be a difficult one and indeed it was. Started in 2012 with DACA and was able to continue renewing DACA, my last renewal was 2019 Jan even though i was fighting to get my Green card not my DACA i still needed something to hack me up incase i got... 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