Costello, Brennan, DeVidas, Sasso and Sinclair, P.C. provides comprehensive legal services designed to meet the diverse needs of our clients. Whether we are handling complex business transactions or offering personalized legal support to individuals and families, we are committed to delivering exceptional results. Our legal team is made up of professionals who share a dedication to quality and are consistently staying updated on the latest developments in their respective practice areas. We take pride in offering thoughtful, knowledgeable, and effective legal guidance, working collaboratively with our clients to ensure their rights are protected and their objectives are achieved. Our approach is centered on achieving the best possible outcomes for each client, no matter the complexity or scope of the legal matter at hand. From negotiating contracts to navigating legal disputes, we are prepared to support and advise clients through every step of the legal process. We understand the importance of trust in the attorney-client relationship, and we prioritize communication, transparency, and personalized attention in every case we handle. At Costello, Brennan, DeVidas, Sasso and Sinclair, P.C., we are passionate about delivering results that reflect our commitment to excellence and the success of our clients.
Highlights and features
- Matrimonial Law
- Real Estate
- Worker's Comp
- Criminal Law
- Probate Law
- Juvenile Law
- Personal Injury
Payment methods
- Cash
- Debit cards
- Credit cards
Services
At our firm, we prioritize resolving family disputes with the least amount of stress and cost for our clients. We aim to reach a settlement that satisfies our clients’ needs, but we are prepared to take cases to court if necessary. With extensive trial experience, Costello, Brennan, Devidas, Sasso, & Sinclair, P.C. is well-equipped to handle complex family law cases. 
Chapter 568 of Connecticut's Workers' Compensation Act secures benefits including income continuation, medical care, and family support for workers injured on the job. Despite the clear legal protections, your employer or their insurance may sometimes fall short of these obligations. If that happens, Costello, Brennan, Devidas, Sasso & Sinclair, P.C. is ready to assist you. 
Facing criminal charges can be a daunting experience, but you don’t have to go through it alone. If you’ve been charged, take steps to protect yourself by selecting a defense strategy you can rely on. At Costello, Brennan, Devidas, Sasso, & Sinclair, P.C., we build strong, personalized defense strategies. Our firm has represented clients in cases involving DUI/DWI, traffic violations, sex crimes, violent crimes, white-collar offenses, and juvenile crimes. When possible, we assist with record expungement or sealing to reduce the lasting impact of criminal charges. 
If you're injured and in need of help, you need an attorney who will stand up to insurance companies and opposing lawyers. Costello, Brennan, Devidas, Sasso, & Sinclair, P.C. specializes in personal injury law and is committed to defending injured clients. Our attorneys have proven themselves as top trial lawyers who will go to court to secure the compensation you deserve. Led by Kieran Costello, Esq., Christopher Brennan, Esq., and Claire DeVidas, Esq., our team delivers a range of legal services with a strong record of successful jury verdicts in personal injury cases, from premises liability to automotive accidents. Let our highly skilled team of personal injury attorneys help you reclaim what you’ve lost, whether income, property, or physical health.
People
Kieran J. Costello Esq
Kieran J. Costello, Esq. is an active member of several prestigious legal organizations, including the Connecticut Trial Lawyers Association, Connecticut Bar Association, American Bar Association, and American Association for Justice. He serves as Co-Chair of the Family Law Section of the Greater Bridgeport Bar Association and participates in the Elder Law Committee of the Connecticut Bar Association, as well as the Trust and Estates Committee. Since 1993, Mr. Costello has also been an Adjunct Professor of Law at Housatonic Community College. His teaching experience includes positions as a Professor of Law at Albertus Magnus College and as an Associate Professor at the University of Bridgeport.
Christopher P. Brennan Esq
Attorney Brennan specializes in personal injury, family law, and criminal law. With years of experience as a trial attorney, he has successfully handled thousands of cases in civil, family, and criminal law, along with workers' compensation hearings across the state. Prior to his legal career, Attorney Brennan worked as a contract specialist at Otis Elevator, a Fortune 500 company under United Technologies, where he focused on commercial contract negotiations and labor litigation. Later, he joined Esty and Buckmir, LLC, an insurance defense firm, where he handled workers' compensation and general insurance defense litigation for major insurers.
Claire DeVidas Esq
Since joining Costello, Brennan and DeVidas, P.C. in 2008, Claire DeVidas has focused her practice on family law, managing cases involving divorce, child custody, alimony, child support, restraining orders, and post-judgment modifications. With experience representing high net worth individuals and those with intricate compensation structures, Claire brings unique expertise to her clients. Prior to her legal career in family law, Claire served as an Assistant District Attorney in New Orleans, where she prosecuted violent crimes like domestic violence. This experience gives her valuable insights into abusive relationships, providing an advantage to her clients in court. Additionally, she offers divorce mediation services aimed at helping couples avoid costly litigation and protect their financial resources.
Reviews (14)
Dru Milkino
May 26, 2022
Claire Devidas is a professional, great lawyer and a person with a big heart. She helped me a lot with the issue of temporary custody of my son during a difficult period of my life, helped me resolve all issues with documents, was always in touch, supported me in court and literally saved my family. Huge gratitude and respect.
Kevin Meehan
Mar 03, 2022
Fantastic experience working with Claire and Kieran. They provided extraordinary guidance along the way and always welcomed my questions and thoughts. Incredibly patient but more importantly, they were consummate professionals and highly experienced. They know their stuff and aggressively act on the client's behalf.
Angela Grasso
Jul 29, 2021
I had the immense pleasure of working with Kieran Costello & Sean Plumb throughout my divorce process. Divorce is difficult enough on any individual but both Kieran & Sean couldn't have been more professional, knowledgeable & encouraging throughout the process (Kieran's sense of humor kept my spirits up as well)! They were there by my side & kept me updated every step of the way! The entire staff at this office is wonderful. I would HIGHLY recommend their services to anyone going through a difficult/challenging divorce. They will not disappoint!
Karen Kay
May 19, 2021
John Oberson
May 17, 2021
In a contentious divorce proceeding, I needed a robust litigation team. Costello, Brennan, DeVidas, Sasso and Sinclair was just what I needed. Attorney Kieran Costello, with his in-depth legal knowledge and Attorney Edward "Skip" Sinclair, with both his legal knowledge as well as his financial background, brought the case to a successful conclusion. I would recommend CBDSS to anyone.
Anna Gustava Brady
Jun 04, 2017
Divorce is, almost without exception, a difficult and painful process. I am incredibly grateful to Kieran Costello, Megan Leffard, and everyone at Costello, Brennan, and DeVidas for guiding me through with expertise and compassion. They were professional, reliable, and communicative. I was never left wondering what was happening or why. When I reached out to give or receive information, responses came in a timely manner.
I have recommended Kieran to a friend and will continue to recommend Kieran and Costello, Brennan, and DeVidas without hesitation. As my marriage deteriorated, I prayed for a miracle and found one. Many thanks for helping me navigate my way out of my previous situation and into my new life.
I have recommended Kieran to a friend and will continue to recommend Kieran and Costello, Brennan, and DeVidas without hesitation. As my marriage deteriorated, I prayed for a miracle and found one. Many thanks for helping me navigate my way out of my previous situation and into my new life.
Tom Goodwin
May 01, 2017
Jonathan Miranda
Mar 31, 2017
Chris Brennan worked on my personal injury case. He took the time to explain the process, the steps required to resolve my case and kept me informed. I had a great deal of confidence in Chris, he resolved my claim to my satisfaction. I highly recommend Chris to anyone looking for legal representation for a personal injury claim.
Alissa Pepe
Sep 28, 2016
I first consulted with Kieran Costello, who was humorous but very knowledgeable. He then handed my case to Attorney Mitchell Teta. Attorney Teta has been amazingly helpful and assertive in dealing with my child custody case. He is honest and direct, and continues to help me fight in court for the best interest of my child. I can't thank him enough for all he has done. Highly recommended firm and law office.
Greyson Schwing
Jul 12, 2016
Richard Breglia
Apr 09, 2016
I have referred Christopher Brennan to many of my clients. He has successfully closed several Real Estate transactions and has always delivered top notch service. Past clients have also retained Chris for evictions, misc. litigation and divorce with the same positive results. He is a diligent worker and always responds in a timely manner. I have only received positive feedback from my clients and will continue to refer Chris clients in the future.
Paola Colombo
Aug 30, 2015
Michelle Williams
Jul 24, 2015
I want to thank Kieran Costello and his team at Costello, Brennan and DeVidas. Kieran helped me get through the most difficult time in my life. He and his team were always fast to respond to my questions and gave me good advice at a time that when I found it difficult to think straight. He always took the time to explain the process to me. Kieran went out of his way to get the other side to work with us and come to a settlement.
He worked to bring closure and expedite the divorce. I never felt as though I was just an account at his firm. Not only did Costello, Brennan and DeVidas handle all of the issues involved with my divorce, they treated me with kindness, patience and understanding. Kieran truly helped me to get back on my feet and re-start my life. I wouldn't want anyone to have to go though the pain of divorce, but if you find yourself in the same position that I faced, I highly recommend Kieran to help you get through it.
He worked to bring closure and expedite the divorce. I never felt as though I was just an account at his firm. Not only did Costello, Brennan and DeVidas handle all of the issues involved with my divorce, they treated me with kindness, patience and understanding. Kieran truly helped me to get back on my feet and re-start my life. I wouldn't want anyone to have to go though the pain of divorce, but if you find yourself in the same position that I faced, I highly recommend Kieran to help you get through it.
Lori M.
Mar 03, 2015
There is no room for second best when battling divorce and domestic violence. It can be one of the most challenging experiences of your life. I count my blessings each day and thank God that Kieran Costello is on my side. His compassion, intelligence, and commitment to justice has and will continue to ensure the safety and well being in every way of both my child and myself.
Not only can you trust that he will help you to achieve your desired outcome, you can trust that he and his staff are going to give it their all each step of the way. Only the best attorney will always ensure a return phone call before the end of the day and not only make sure your concerns are addressed, but end the conversation with a blessing. God Bless you Kieran and staff!
Not only can you trust that he will help you to achieve your desired outcome, you can trust that he and his staff are going to give it their all each step of the way. Only the best attorney will always ensure a return phone call before the end of the day and not only make sure your concerns are addressed, but end the conversation with a blessing. God Bless you Kieran and staff!