John Edward Brennock

John Edward Brennock

5.0
Rating: 8.5

Licensed for 16 years

Real estate Lawyer at Naperville, IL
Practice Areas: Real Estate, Probate, Estate Planning ... +5 more

1771 West Diehl Road, Suite 120, Naperville, IL

About John

Biography

Practice Areas

8

Practice Areas

Probate 30%

Contested Estates, Estate Litigation and Guardianship

17 years

30%
Real Estate 30%

17 years

30%
Landlord or Tenant 15%

Lease negotiation and eviction litigation.

17 years

15%
Business 5%

17 years

5%
Appeals 1%

12 years

1%
Elder Law 1%

12 years

1%

Fees and Rates

Cost

Free Consultation

$0 first 6 minutes

Hourly Rates

$ 175-375 per hour


Payment Methods

  • Cash
  • Check

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Licenses

Licensed in Illinois for 16 years

State: Illinois

Acquired: 2009

Active and Authorized to Practice Law

No misconduct found

Location

Diaz Anselmo & Associates P.A.

1771 West Diehl Road, Suite 120, Naperville, IL, 60563

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John Edward Brennock's Reviews

Avvo Review Score

5.0 /5.0

73 Client Reviews

Showing 1 - 5 of 19 reviews | General Knowledge

Posted by Barbara Vasconcelos & Paul-Louis Gros | April 30, 2025 | Hired Attorney | Real Estate

Smooth and Stress-Free Home Buying Experience

I had a fantastic experience working with Diaz Anselmo Law Firm on the purchase of my home. Attorney John Brennock and paralegal Anne Baker were both outstanding—knowledgeable, responsive, and genuinely committed to making the process smooth and stress-free. John guided me through the legal aspect...s with clarity and confidence, and Anne was incredibly organized and helpful with the many details that come up in a real estate transaction. They were always available to answer my questions and made sure everything stayed on track for a timely closing. I truly appreciated their professionalism, patience, and personal attention. I wouldn’t hesitate to work with them again or recommend them to anyone in need of a reliable real estate legal team.

Posted by Kelly | September 11, 2024 | Hired Attorney | Estate Planning

Great experience

Worked with John Brennock on estate planning and have nothing but positive things to say. He is extremely knowledgeable, patient, professional, and always took the time to answer our many questions. The support team was excellent as well. We will be returning to John for any future legal needs!

Posted by Kevin | May 21, 2024 | Landlord & Tenant

Great experience

Mr. Brennock was very helpful in addressing an issue that we had with a landlord. He was very knowledgeable of the Chicago ordinances and provided excellent counsel.

Posted by Will | May 24, 2023 | Hired Attorney | Probate

Probate, Estate litigation, Real Estate... One stop shop!

I hired John after my mother died to handle the probate estate as well as to help with litigation regarding estate assets and his guidance and ease of availability was exactly what I needed at that difficult time in my life. Knowing next to nothing about probate, there was no way I could have navi...gated it without his help. He handled all the paperwork, filing, and communication with the courts as well as being easily reachable through email and phone calls whenever I had a question. He helped me out similarly when it came to litigation regarding the estate assets. What became an unnecessarily long, uphill legal battle (by no fault of John) turned into a huge win for me and the estate. I should also add that he secured wins for the estate every step of the way, including when the matter was taken to appeals by the other side. The courts found his arguments persuasive and well-founded despite the difficult road to get there. I had another attorney working on the estate litigation and he was able to deftly work with schedules between them, the courts, and the other side which I'm sure wasn't an easy task and involved many a late night. John and his firm also helped me sell the estate's real estate holdings which was also a painless process for me. In fact, my realtor said they were the easiest and most professional lawyers they ever did business with! His professionalism was steadfast through the whole process and if I had to do it over, I'd, without a doubt, retain John's services again, especially given the 5 star outcome across the board. Highly recommend.

Posted by Gail | February 13, 2020 | Hired Attorney | Real Estate

Super Lawyer

John is an excellent lawyer, a domain expert in every aspect of real estate law. He sets you straight with his legal knowledge, takes time to explain to you what you may not want to hear, and protects you from repercussions and liability. He treated me like a million dollar client for a small legal a...ssignment. Honestly, if you want a solid real estate lawyer who treats you well and protects you like a super hero with his legal expertise, don't look anywhere else. I only wish I'd discovered him sooner.

See All Client Reviews

John Edward Brennock's Lawyer Endorsements

Endorse John
Michelle K. Grayzeck headshot
Michelle Grayzeck

Unknown lawyer | Feb 12

Relationship: Fellow lawyer in community

"I endorse John. He is a passionate and zealous advocate for his clients and an absolute professional to work with."

Aaron E. Rifkind headshot
Aaron Rifkind

Landlord or tenant lawyer | Sep 23

Relationship: Opposing Counsel on matter

"I endorse this lawyer."

Joseph Andrew Brabender IV headshot
Joseph Brabender

Landlord or tenant lawyer | May 20

Relationship: Worked together on matter

"John and I have worked together on numerous landlord-tenant matters with excellent results."

Brad E. Karlin headshot
Brad Karlin

Unknown lawyer | Jun 02

Relationship: Fellow lawyer in community

"I endorse this lawyer."

Scott David Goldman headshot
Scott Goldman

Unknown lawyer | Apr 25

Relationship: Friend

"Mr. Brennock is an excellent attorney with an excellent track record. When it comes to representation in the greater Chicago area, you cannot go wrong using Mr. Brennock's exceptional services. Do not let your rights be handled by anyone else -- Mr. Brennock is the right stop for you."

Jeffrey Anthony Skiendziul headshot
Jeffrey Skiendziul

Landlord or tenant lawyer | Mar 21

Relationship: Fellow lawyer in community

"I find Mr. Brennock to be a highly reputable and reliable attorney who is knowledgeable, capable and compassionate towards his clients. Anyone needing legal advice should turn to John Brennock. I endorse this lawyer."

Jason Michael Perash headshot
Jason Perash

General practice lawyer | Feb 23

Relationship: Worked together on matter

"I endorse this lawyer. John tutored me years ago in law school, and he always had a thorough command of the various areas of law. We have talked often since then, and he has given me valuable advice on how to run my practice and help clients. If you live near Chicago and have a problem that John can help you with, I unquestionably recommend a call to John."

Howard M Lewis headshot
Howard Lewis

Landlord or tenant lawyer | Feb 23

Relationship: Fellow lawyer in community

"I endorse this lawyer. Attorney Brennock is an outstanding attorney with an excpeptional reputation. He is a strong and zealous advocate for his clients and a credit to the legal profession."

Stephanie Bowman Arsenty headshot
Stephanie Arsenty

Unknown lawyer | Feb 17

Relationship: Fellow lawyer in community

"I endorse this lawyer."

Edwin H. Korb headshot
Edwin Korb

Landlord or tenant lawyer | Mar 05

Relationship: Worked together on matter

"I endorse this lawyer. He is bright, knows the law well, has a great temperment yet is an excellent advocate for his clients. He has a strong work ethic and always quotes the most reasonable fees. I know he has many satisfied clients."

Carlton Richard Marcyan headshot
Carlton Marcyan

General practice lawyer | Mar 05

Relationship: Fellow lawyer in community

"J.E. Brennock is an aggressive, insightful and smart lawyer who provides valuable service and assistance to his clientele. Most importantly he is a person who can be trusted and zealously protects his client's interests. I strongly recommend him to be your counsel. Carlton R. Marcyan Attorney/CPA/CFP"

View All Endorsements
Jason Michael Perash headshot
Jason Perash

Unknown lawyer

Stephanie Bowman Arsenty headshot
Stephanie Arsenty

Foreclosure lawyer

Brad E. Karlin headshot
Brad Karlin

Litigation lawyer

Jeffrey Anthony Skiendziul headshot
Jeffrey Skiendziul

Criminal defense lawyer

Mark Aaron Silverman headshot
Mark Silverman

Landlord or tenant lawyer

Experience

Rating:  8.5 (Excellent)

Honors

2015

Client's Choice Award - Landlord & Tenant Law, Avvo

2014

Client's Choice Award - Landlord & Tenant Law, Avvo

2013

Client's Choice Award - Landlord & Tenant Law, Avvo

2012

Clients' Choice Award - Landlord & Tenant Law, Avvo

2008

The Eugene S. Quigley Delta Theta Phi Scholarship Award., Delta Theta Phi Law Fraternity, Power Senate

Work Experience

2023 - Present

Senior Associate Attorney, Diaz Anselmo & Associates P.A.

2021 - 2023

Associate Attorney, Diaz Anselmo & Associates P.A.

2020 - 2021

Principal, Law Offices of John E. Brennock

2019 - 2020

Associate Attorney, Spain, Spain & Varnet, PC

2015 - 2019

Senior Associate Attorney, Alicja M. Sroka & Associates, P.C.

2009 - 2015

Principal, Law Offices of John E. Brennock

2008 - 2008

Legal Intern, Glassen Rhead McLean Campbell & Schumacher

2008 - 2008

Student Attorney, Washtenaw Public Defender Clinic

Associations

2017 - Present

Illinois State Bar Association

Member - Judicial Evaluation Committee (Cook County)

2016 - Present

DuPage County Bar Association

Member

2016 - Present

Illinois State Bar Association

Member - Standing Committee on Delivery of Legal Services

2011 - Present

First American Title

Attorney Title Agent

2011 - Present

Chicago Title

Attorney Title Agent

2009 - Present

American Bar Association

Member

2009 - Present

Chicago Bar Association

Member

2009 - Present

Illinois State Bar Association

Member

Sample of Legal Cases

FirstMerit Bank, N.A. v. Soltys, 2015 IL App (1st) 140100

Appellate court affirmed dismissal of claims against Defendant/Client

Security Deposit Recovery Case

Settled - Tenant received $5,550.00

Security Deposit Recovery Case

Settled - Tenant received $4,314.50

See More Legal Cases

Education

2008

Western Michigan University

JD - Juris Doctor

2006

John Carroll University

BA - Bachelor of Arts

Speaking Engagements

2024

Landtrust Title Services - May 2024 presentation

Title 101 and 2024 Title Market Trends: What REALTORS Need to Know

2024

Chicago Veterans Real Estate Meetup - July 2024

Risk Mitigation, Protecting Your Interests and Getting the Deal Closed: Your Attorney's Role in the Real Estate Transaction

2019

The Chicago Friendly Lawyers Conference - 2019 Law Firm Buisness Plans (starting and growing your practice)

2017

ABA Law Student Division National Arbitration Competition - National Finals

Arbitration Competition - Judge

2015

Chicago Bar Association Moot Court Competition Competition Judge

2015

ABA Law Student Division National Arbitration Competition - National Finals Arbitration Competition - Judge

2014

ABA Law Student Division National Appellate Advocacy Competition

Moot Court - Appellate Judge

2014

7th Circuit Spring Meeting Lunch with Professionals (Landlord/Tenant)

Publications

Languages

English

Activity

Avvo Rating

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  • Experience & background Years licensed, work experience, education
  • Legal community recognition Peer endorsements, associations, awards
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