Office | Langhorne, PA
Choose Office Branch
Pennsylvania

About Zlock & Grisillo

Bucks County Pennsylvania Family Law Lawyers and Divorce Attorneys with offices located in Doylestown, Pennsylvania and Yardley, Pennsylvania.

Founded in 1996, Zlock & Grisillo is a top family law firm with offices in Langhorne-Newtown, PA and Doylestown, PA, Bucks County, Pennsylvania. Our attorneys and staff focus almost exclusively on assisting clients with their family law matters, including divorce, custody, support, protection from abuse, and all related issues. We understand that family law poses unique challenges for clients. Our goal is to support our clients through their difficult times by providing the expertise necessary to effectively handle our clients' matters. We recognize that clients may desire different approaches to handling their cases, and we are prepared both to amicably settle and to litigate cases pursuant to our clients' needs. Regardless of the approach, we are our client's advocates from beginning to end.

 

Awards

Reviews for Zlock & Grisillo

Have you consulted or hired this firm?

Leave a review about your experience with this firm.

Write a Review

Overall Rating
Showing 1-10 of 74 client reviews from Lawyers.com
Lawyers.com Rating Snapshot
5 stars
88%
4 stars
5%
3 stars
0%
2 stars
1%
1 star
5%
What do people say on Lawyers.com?
Communication
4.8
Quality of Service
4.7
Responsiveness
4.7
Value for Money
4.7
Family Law
Posted by Carl
October 25, 2025
Hired Attorney Mark Zlock

Mark Zlock is an exceptional family law attorney who is knowledgeable, calm, and deeply strategic. From our very first meeting, he brought clarity and confidence to an extremely difficult process. He is the rare attorney who can prepare for court like a warrior yet also knows when and how to reach a fair resolution outside of it. After working with several other attorneys over the years, Mark was the only one who truly got it done. He is highly respected by judges and peers alike, communicates clearly, and delivers results through preparation, integrity, and experience. I am incredibly grateful for his dedication and professionalism throughout every step of my case. I am truly glad I retained him. I would much rather have Mark on my side of the table than across the aisle. If you are looking for a trustworthy, skilled family law attorney in Bucks County who genuinely cares about both the outcome and the people involved, I cannot recommend Mark Zlock highly enough.

 
Family Law
Posted by Twosixthree
October 12, 2025
Hired Law Firm

Amir Stark is Hands down best family lawyer in bucks county There is simply no better family law attorney in Bucks County...he is respected by clie ts, opposing attorneys ( probably feared at this point(, and most importantly by the judges. I lucked into having him on a pfa Wednesday ( plaintiff) and we have lierally won every decision rendered since....not just because he knows how to play the game...he understands that you need evidence, he knows how to calm you down, he knows the law, and hes the most responsive and detailed lawyer you will find...our opposition tried 5 laywers and we beat them all because of his work ethic, the truth, and his ability to keep us focused on the tasks at hand...it helped that the other guy is a lying sociopath but you cant just walk into a courtroom and say that...he has been there every step of the way for us at multiple firms and despite me being a testy client from time to time he never waivered and never let us down. I consider him a friend

 
Child Custody
Posted by Kathleen
August 16, 2024
Hired Attorney Mark Zlock

We had a very complicated custody case. WE WON after hiring Mark Zlock just four months ago. Mark worked with our daughter from day one helping her to gain confidence as she navigated the legalize of family law to maintain the safety of her child. Mark helped us develop an offer to settle before court but it was turned down. We ended up with more than we were asking for! He was extremely well prepared for court after working carefully to prep our daughter for testimony. Her confidence on the stand was a testament to his skill. The support staff at Zlock&Grisillo were diligent in assisting Mark with organizing supporting documents needed to win our child's custody. Ensuring her safety legally is worth every dollar. If it looks like things might not go well, we recommend hiring Mark Zlock: He is a legal 'Bull Dog'!

 
Family Law
Posted by Daniel
August 08, 2024
Hired Attorney Mark Zlock

Mark's expertise is undoubtedly unparalleled in the field of family law. His outstanding success rate is due to his care and dedication to every case. It takes a great deal of preparation to be successful in the courtroom and Mark spends the time needed to cover all the possibilities to be ready for any potential surprises. I highly recommend Mark for any family law dispute. The money is well spent with Mark! Daniel

 
Family Law
Posted by anonymous
August 07, 2024
Hired Attorney Mark Zlock

It was a great pleasure working with Mr. Zlock and multiple people from his office. He is highly professional, caring and exceptionally well prepared. Unlike some other attorneys, he is virtually always available to answer phone calls, even late at night, early in the morning and on weekends. He puts in a lot of effort while working on your case, but this is undoubtably time and money well spent. He will make the most of your situation. Highly recommended!

 
Child Custody
Posted by Lynnsy
August 05, 2024
Hired Attorney Mark Zlock

I have only kind words to share about Mr. Zlock. My case is not over. However, the guidance and patience Mr. Zlock has provided me, alongside of his knowledge and practices in law are respected. I trust only his judgment to bring me through the remainder of a very difficult custody case and on the other side with gratitude. Mr. Zlock (Mark) is a very honest attorney and I would like to compliment him with high recommendations for future clients. - Thank you for your continued guidance, Lynnsy

 
Divorce
Posted by John
May 24, 2024
Hired Attorney Jeffrey Grisillo MBA

From the moment I had my first consultation with Jeff, I felt like I had someone in my corner that was going to fight for me. He and the rest of the team were incredibly knowledgeable and were constantly one step ahead of my ex-wife's counsel. He was available whenever I had a question and was able to walk me through the divorce process step by step. I'm not exaggerating when I say that Jeff and the team probably saved me $100K through some excellent negotiating tactics. I would recommend him to anyone going through a divorce.

 
Child Custody
Posted by Becky
February 22, 2024
Hired Attorney Jeffrey Grisillo MBA

Jeff has been my lawyer for many years now. I was using other attorneys and Jeff has always been amazing. I have also used his partners and they have been wonderful. Jeff has been there for me through thick and thin and is worth every penny. We have been to court multiple times and he wins each time. He’s tough and knowledgeable and anyone who hires him is lucky to have him in their corner. He is always available and always looks out for his clients the best way possible

 
Family Law
Posted by ANUM
August 08, 2023
Hired Attorney Mark Zlock

I won my case today, choosing Mark Zlock to represent me was the best decision. He was absolutely amazing. Knowledgeable, understanding, brilliant! I appreciated the fact that he was always willing to explain everything and made sure you were prepared. I am forever grateful. Thank you so much.

Child Custody
Posted by Joseph
July 20, 2023
Hired Attorney Jeffrey Grisillo MBA

I can't say enough great things about my experience with Jeff Grisillo. From the moment I hired him, he was ALWAYS there for me. My goal was to get primary custody of my two boys. Jeff was with me every step of the way, through countless phone calls and many court hearings. Jeff always took my phone calls when he was in the office. If he wasn't in the office, he would return my call later that day or evening. He even answered phone calls and questions from my parents! Jeff is extremely knowledgeable and very good at explaining what to and not to expect, especially in court. He worked tirelessly to prove that I should have primary custody. I was told by many people that I wouldn't have a chance because Bucks County almost always goes in favor of the mother, and the best I could hope for was 50/50 custody. In the end, I was awarded primary custody of my boys because of Jeff Grisillo! I will always be indebted to him for that. He is a great lawyer - none better!

 

Services

Areas of Law

  • Family Law 33
    • Domestic Relations
    • Child Custody
    • Child Custody Mediation
    • Child Support
    • Grandparents Custody
    • Grandparents Visitation Rights
    • Parental Rights
    • Parenting Time
    • Termination of Parental Rights
    • Alimony
    • Cohabitation Agreements
    • Divorce
    • Domestic Violence
    • Marital Agreements
    • Matrimonial Law
    • Military Divorce
    • Name Changes
    • Non-Traditional Family Law
    • Paternity Post Divorce Modification
    • Postnuptial Agreements
    • Premarital Agreements
    • Qualified Domestic Relations Orders (QDROs)
    • Spousal Support
    • Uncontested Divorce
    • Custody Modification
    • Joint Custody
    • Sole Custody
    • Custody Agreements
    • Custody Orders
    • Alimony Modification
    • Alimony Pendente Lite
    • No Fault Divorce
    • Contested Divorce

  • Fathers Rights
  • Annulment
  • Agency and Distributorships 2
    • Equitable Distribution
    • Marital Property Distribution
  • Property Law 1
    • Marital Property Law
  • Restraining Orders
  • Legal Separation 1
    • Separation Agreements
  • Other 2
    • Property Settlement Agreement
    • Relocation

Office Details

  • Languages

    English
    Spanish
    Russian.

  • Payment Information
    Payment & Cost Features

    Fixed hourly rates
    Fixed fees available

    Accepted Credit Cards

    Discover
    Visa
    American Express
    MasterCard
    Other - Check
    Cash

  • Video Calls

    Offers Video Calls

    Video Call Options

    Zoom

  • Firm History
    Year Established

    1996

  • State Bar Summary

    All Attorneys are members of the Pennsylvania and Bucks County Bar Associations. Kevin M. Zlock and is also members of the American Bar Association. Brian A. Coverdale is a member of the NJ Bar.

  • Pro Bono Services

    A commitment to public service to veterans and First Responders has always been our priority. We represent them at no charge in no fault, no issues divorces. We also participate in the initiative Wills for Heroes.

  • Additional Links

Contact Zlock & Grisillo

4.7
127 reviews

777 Township Line Road, Suite 240Langhorne, PA 19067U.S.A.

Show on map
Fax: 215-504-1313
Office Hours:
  • Monday 08:00 AM - 07:00 PM
  • Tuesday 08:00 AM - 07:00 PM
  • Wednesday 08:00 AM - 07:00 PM
  • Thursday 08:00 AM - 07:00 PM
  • Friday 08:00 AM - 07:00 PM
  • Saturday 09:00 AM - 01:00 PM
  • Sunday 09:00 AM - 01:00 PM

Activity

Legal Community Contributions

Case type is required.
I am is required.
First name is required.
Last name is required.
A valid zip code is required.
Country is required.
State is required.
A valid city is required.
A valid email address is required.
A valid phone number is required.
Message is required.
0/1000 characters

By clicking the Submit button, you agree to the Terms of Use, Supplemental Terms and Privacy Policy. You also consent to be contacted at the phone number you provided, including by autodials, text messages and/or pre-recorded calls, from Lawyers.com and its affiliates and from or on behalf of attorneys you request or contact through this site. Consent is not a condition of purchase.

You should not send any sensitive or confidential information through this site. Emails sent through this site do not create an attorney-client relationship and may not be treated as privileged or confidential. The lawyer or law firm you are contacting is not required to, and may choose not to, accept you as a client. The internet is not necessarily secure and emails sent though this site could be intercepted or read by third parties.

This site is protected by reCAPTCHA. See Google’s Privacy Policy and Terms of Service.

Thank you! Your message has been successfully sent.

For your records, a copy of this email has been sent to test@test.com.

Summary of Your Message
Case Type:
I am a/an:
First Name:
Last Name:
City:
Zip Code or Postal Code:
State:
Country:
Phone Number:
Message: