Your Partner in Overcoming Immigration Challenges
Helping Individuals, Businesses and Organizations Nationwide to obtain their Visas, Green Cards and Citizenship.
N400 Harbor Immigration Law
N400 Harbor Immigration Law, P.L.L.C. is a full-service immigration law firm located in Pompano Beach, Florida. In addition to serving clients in Florida, we help individuals, businesses, and organizations nationwide to obtain visas, Green Cards, and citizenship.

Comprehensive Immigration Services You Can Trust
At N400 Harbor Immigration Law we understand that the United States of America is a melting pot of immigrants from all over the world. We also are aware of the legal challenges that many immigrants who are coming and seeking to stay in the U.S. face every day. Here at N400 Harbor Immigration Law we work tirelessly and compassionately to help our clients navigate the complexities of the U.S. immigration legal system.
We are invested in your story and provide legal services with a high level of expertise and care. We would be honored to represent you, so you can plan and build your future in the United States of America.
Our Services
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Dario Castañeda, ESQ
Founder & Managing Attorney
Mr. Castañeda concentrates his practice in both family-based and employment immigration law and has extensive experience in removal proceedings.
Immigration News
Important Update – New USCIS Asylum Annual Fee Requirements
USCIS has implemented new fees for asylum applicants that affect both new and pending cases. It is very important for all asylum applicants to understand these…
Read MoreActualización Importante – Nuevos Requisitos de la Tarifa Anual de Asilo de USCIS
USCIS ha implementado nuevas tarifas para los solicitantes de asilo que afectan tanto a los casos nuevos como a los pendientes. Es muy importante que todos…
Read MorePermanent Resident vs. U.S. Citizen: Key Differences
Starting life in a new country requires grit, patience, and a significant amount of paperwork. Along the way, two terms keep popping up, permanent Resident and…
Read MoreCarrying Hope Across Borders: Honoring Migrants and Refugees
As we approach the World Day of Migrants and Refugees, we at N400 Harbor Immigration Law, P.L.L.C. are reflecting on the powerful journeys of those who…
Read MoreFiancé Visa vs. Spouse Visa: Which Is Right for You?
Planning a life together in the United States is exciting, and the first big choice is which visa fits your plans. Some couples want to marry…
Read MoreLlevando Esperanza a Través de las Fronteras: Honrando a los Migrantes y Refugiados
A medida que se acerca la Jornada Mundial del Migrante y del Refugiado, en N400 Harbor Immigration Law, P.L.L.C. reflexionamos sobre los poderosos viajes de quienes…
Read MoreWhat to Expect at Your Immigration Lawyer Consultation
Big plans often start with a simple meeting. If you are feeling unsure about the rules, timelines, and forms, you are not alone. At N400 Harbor…
Read MoreQué Significa para Usted la Nueva Política de Inmigración “America First”
El enfoque de “America First” en inmigración se centra en una aplicación más estricta, menos beneficios y mayor prioridad para los ciudadanos nacidos en el país.…
Read MoreK1 Visa Interview Questions: What to Expect
Applying for a K-1 fiancé(e) visa is an emotional process — not just because it’s a major step toward starting your life together in the United…
Read MoreWhat Are the Advantages of a Green Card?
Dreaming of building a life and career inside the United States is common across the globe. Securing a Green Card often turns that dream into daily…
Read MoreStories from Our Satisfied Clients
"I had an exceptional experience with Dario Castaneda during a recent phone consultation. He was incredibly knowledgeable and took the time to thoroughly explain every detail of my case, ensuring I fully understood my options. His professionalism and patience were evident throughout the entire conversation, and I never felt rushed. Dario's expertise in immigration law is clear, and his ability to break down complex legal matters into easy-to-understand terms made me feel confident and well-informed. I highly recommend him for anyone in need of immigration legal assistance!"
"Amazing lawyer! Dario guided us through the entire process of requesting our E2 Visa. He was always available for my calls or texts, also his team was always on top of every single detail. He got us ready for our interview and presented a great case, we only got asked two questions during the interview because of this!"
"I recently attained U.S. citizenship, and I owe my gratitude to Dario Castenada and N400 Harbor Immigration Law for their invaluable assistance. Dario expertly guided me through every step of the process. He even took the time to call me the day before my interview, outlining what I should expect and the kinds of questions that would be asked. I'm extremely thankful for Dario's effort to alleviate my stress!"
"Do yourself a favor and hire Attorney Dario and his team. They are amazing, they made my immigration application process easy and so smooth. I was able to get everything I needed in exactly a year. I am now a green card holder and ready to travel the world. Thank you Dario for everything.”
"Dario and the N400 Harbor Immigration Law team are extremely knowledgeable, and they take the time to patiently explain the complexities of immigration law. He is a very empathetic person who goes above and beyond to ensure everything is done with a keen eye for detail and in a timely manner. Dario is quick to respond to any inquiries and ensures you feel listened to and understood"
"I just want to start off by saying how thankful and blessed I was for coming across Dario and his whole attorney team. Dario helped my husband with receiving his citizenship a few weeks back, it was stressful for us due to my husband having a background many years back but Dario fought for us and helped push everything thru and made it as stress free as possible. He was always so understanding and explained everything so thoroughly. I would highly recommend him!"
"Mr. Castaneda has shown a lot of attention to my citizenship process and is very attentive throughout each step. He is very knowledgeable in his field and I am very glad that I have him representing me. I am very confident in his skills and it's a great comfort knowing that I hired a top-tier professional like Dario, to guide me through this complicated process!"
"Dario and everyone at his firm did an incredible job with our case which had a positive outcome. He immediately put our mind at ease with excellent consultation. He filed the forms in an incredible timely and thorough manner. He followed up immediately when the government responded. And he coached us before our interview which made everything easier. I would recommend him to anyone who has an immigration issue."
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