Website
Call
Costello, Brennan, DeVidas, Sasso and Sinclair, P.C.
As the Number 1 law firm to protect your rights, our lawyers handle cases for Matrimonial (Divorce & Family), Criminal Law, Probate and Juvenile Law, Personal Injury, Workers Compensation and Real Estate Transactions.
Highlights and features
  • Matrimonial Law
  • Real Estate
  • Worker's Comp
  • Criminal Law
  • Probate Law
  • Juvenile Law
  • Personal Injury
Services
Matrimonial Law Our attorneys are sensitive to the individual needs of each of our clients in family disputes as we recognize that they can be emotionally charged and difficult for many families. Our matrimonial law practice includes:

divorces
custody actions
relocations
property disputes
child support and alimony
Workers Compensation At Costello, Brennan, Devidas, Sasso, & Sinclair, P.C. we provide you with the information to make the right choices so that you can receive the best medical care, benefits, and income. When injured in a workplace accident, sustains an occupational illness, or suffers the job-related aggravation of an existing condition, you may be eligible for Worker’s Compensation. These benefits, again, include medical benefits, wage loss benefits, disability benefits, and death benefits.
Criminal Law No matter what criminal charges you are facing, an experienced attorney is your best defense in proving your case or helping to achieve a reduction in charges or sentencing. Costello, Brennan, Devidas, Sasso, & Sinclair, P.C. is ready to put our experience to work on your defense. Contact our office now to put your future in good hands.
Personal Injury Our attorneys have obtained jury verdicts in all areas of personal injury litigation, including premises liability and automotive liability. If you find yourself in need of help, this highly skilled and qualified team of personal injury attorneys will make a difference in your life. We will work to restore, to the full extent of the law, what you lost in income, property damage, and physical injuries.
People
Kieran J. Costello Esq
Kieran J. Costello Esq
Kieran J. Costello, Esq. is a member of the Connecticut Trial Lawyers of America, the Connecticut Bar Association, the American Bar Association and the American Association for Justice. In addition, Mr. Costello is the Co-Chair of the Family Law Section of the Greater Bar Association, a Member of the Elder Law Committee of the Connecticut Bar Association and a Member of the Trust and Estates Committee of the Greater Bridgeport Bar Association.

Mr. Costello has been an Adjunct Professor of Law at Housatonic Community College since 1993. Previously, he was a Professor of Law at Albertus Magnus College and Associate Professor at the University of Bridgeport.

Mr. Costello volunteers at Fairfield Community Services, where has served on the Board of Directors, the Domestic Violence Crisis Center of Stamford/Norwalk and the Y.W.C.A. of Greenwich. He has also served as a member of the Board of Directors at “the Center for Family Justice” in Bridgeport where he continues to volunteer. Mr. Cos
Christopher P. Brennan Esq
Christopher P. Brennan Esq
Attorney Brennan concentrates in the areas of personal injury law, family law and criminal law. Attorney Brennan is an experienced trial attorney. Throughout his legal career, he has litigated thousands of civil, family and criminal cases and has participated in worker’s compensation hearings throughout the state.

After completing law school, Attorney Brennan began his legal career as a contract specialist working for Otis Elevator, a Fortune 500 United Technologies Company focusing on commercial contract negotiation and labor litigation. After leaving Otis Elevator, Attorney Brennan became an associate at Esty and Buckmir, LLC, an insurance defense firm focusing on worker’s compensation and general insurance defense litigation for major insurance companies.

As a partner at Costello, Brennan, DeVidas, Sasso and Sinclair, P.C., Attorney Brennan represents countless numbers of clients in areas of personal injury litigation, worker’s compensation litigation
Reviews (14)
Kay Gac
Kay Gac
Aug 16, 2021
Report
From start to finish dealing with this firm and Cody Taylor, Esq. was an absolute pleasure. Very professional and responsive. Could not be more pleased and we are very grateful.
Angela Grasso
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
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.
Joanne Stevens
Joanne Stevens
Apr 03, 2020
Report
Kieran Costello is the only lawyer I trust to represent me in my custody battle. I was in the worst situation possible before I met Kieran and I thought I was really out of options and scared that my relationship with my children was gone. I highly recommend Kieran. He will fight for you.
Stephanie Johnson
Stephanie Johnson
Mar 31, 2020
Report
I was recently represented by Claire DeVidas in my divorce. Claire was knowledgable, efficient, empathetic and effective. I interviewed several firms and am very glad I chose this one. Highly recommend Claire and her firm.
Kate Larson
Kate Larson
Sep 04, 2017
Report
I used Chris Brennan for my divorce case and I would highly recommend him! He was attentive, cost efficient and stood up to my bully ex.
Anna Gustava Brady
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
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.
Carolyn Baker
Carolyn Baker
Apr 23, 2017
Report
Claire DeVidas defended me when my ex decided to file a motion to reduce his alimony payments. It was not easy but Claire was able to show that my ex was voluntarily lowering his income just to pay me less and won the hearing. I would recommend Claire to anyone the has to face the ugliness of the family courts, great attorney.
Teresa Gold
Teresa Gold
Jul 31, 2016
Report
After consulting with several different law firms I decided to go with Costello, Brennan and DeVidas to handle my probate case. I was extremely happy with their service. All the attorneys there were so helpful and knowledgeable. I highly recommend them!
Karen Munson
Karen Munson
May 04, 2016
Report
I would like to say that Attorney Mitchell Teta is a great attorney. He really helped me with my case.
Sue Hart
Sue Hart
Apr 09, 2016
Report
I interviewed several law firms and was glad to have chosen Costello, Brennan and DeVidas. Working with Attorney Teta and Attorney Sasso I always felt informed and protected. I highly recommend this Firm.
Michelle Williams
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.
Sandy Wenner
Sandy Wenner
Jun 29, 2015
Report
I was represented by Attorney Costello and other attorneys in his office regarding my ugly divorce. The office was very responsive to my questions and were fierce advocates in the courtroom. I highly recommend Costello, Brennan and DeVidas, P. C.