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Costello, Brennan, DeVidas, Sasso and Sinclair, P.C. Costello, Brennan, DeVidas, Sasso and Sinclair, P.C.
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Your Trusted Legal Partner in Fairfield, CT
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.
Services
Divorce Attorney Child Support Child Custody Spousal Support Divorce Mediation Real Estate Transactions Workers Compensation Criminal Defense Probate Attorney Juvenile Law
Highlights and features
  • We offer over 25 years of combined experience in Connecticut family law
  • Our team includes former adjunct law professors and certified domestic violence counselors
  • We maintain active memberships in Connecticut Trial Lawyers and local bar associations
  • Our attorneys have successfully handled thousands of divorce and custody cases
  • We provide personalized case management with daily communication and updates
Payment methods
  • Cash
  • Debit cards
  • Credit cards
What people say
Genuinely concerned Exceptional attorneys Fiercely advocated Compassion and expertise Unmatched domestic violence experience
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Services
Divorce Attorney
Our experienced divorce attorneys guide clients through dissolution proceedings with sensitivity and strategic representation. We handle asset division, alimony, and child-related matters while prioritizing amicable resolutions. Our team combines courtroom expertise with mediation skills to achieve favorable outcomes while minimizing emotional distress during this challenging life transition.
Child Support
We help establish, modify, and enforce child support orders that meet Connecticut guidelines while addressing children's actual needs. Our attorneys work with parents to create fair arrangements covering housing, education, and healthcare expenses through negotiation or litigation when necessary.
Criminal Defense
Our criminal defense team protects clients' rights against charges ranging from DUI to violent crimes. We challenge evidence, negotiate plea agreements, and provide courtroom representation while working to minimize long-term consequences through record expungement options.
Probate Law
We assist with wills, trusts, and estate administration while handling guardianship and conservatorship cases. Our attorneys provide comprehensive probate services including will contests and fiduciary representation throughout Connecticut's probate courts.
Personal Injury
Our personal injury attorneys represent clients in auto accidents, slip-and-fall cases, and workplace injuries. We pursue compensation for medical expenses, lost wages, and pain suffering through settlement negotiations or jury trials when necessary.
Questions
How does CBDSS Law handle child custody cases?
We create custody plans focusing on children's well-being while reducing parental conflict through negotiation and mediation.
Can I modify existing child support orders?
Yes, we help adjust support orders when circumstances like job loss or medical needs change significantly.
What makes your divorce mediation different?
Our process emphasizes respectful communication and practical solutions while maintaining privacy and control over outcomes.
Do you handle out-of-state family law matters?
We primarily serve Connecticut residents but can assist with interstate custody and support issues through proper jurisdiction.
How are attorney fees structured?
We offer transparent billing with free initial consultations and work to accommodate clients' financial situations.
Reviews (14)
Dru Milkino
May 26, 2022 Report
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 Report
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 Report
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 Report
Attys Costello and DeVidas recently helped get me divorced and I can't thank them enough. Kieran is brilliant in front of a judge and Claire's focus on detail gets motions and agreements written accurately and persuasively. I highly recommend this team.
John Oberson
May 17, 2021 Report
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 Report
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.
Tom Goodwin
May 01, 2017 Report
I hired Chris after getting seriously injured in a work place accident. He was able to fight the worker's comp. commission in order to reach a very favorable settlement for me. I highly recommend Attorney Brennan.
Jonathan Miranda
Mar 31, 2017 Report
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 Report
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 Report
I have enjoyed dealing with Kieran Costello over the last few years. I always appreciate his direct and professional manner and his staff and partners are always courteous and professional. I recommend Costello, Brennan, and DeVidas with confidence to anyone needing a good attorney.
Richard Breglia
Apr 09, 2016 Report
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 Report
The Costello, Brennan and DeVidas, P.C. office, specifically Anthony Sasso, Esq., was extremely helpful and attentive helping me through a personal matter during a difficult time. The results we super positive and the stress was minimal. I recommend.
Michelle Williams
Jul 24, 2015 Report
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.
Lori M.
Mar 03, 2015 Report
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!