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Reliable Attorney DiAna Law Group Lawyers

Reliable Attorney

Are you in need of:
Good advice.
A fighter when its time to fight.
But most of all …
a RELIABLE attorney, you can trust.

This is what we do every day!

Personal Injury

If you or someone you love has been hurt in an accident, the most important thing you need is an reliable attorney you can trust and can talk with personally.

Call us first before you get sold on high priced contingency fees only to be treated like a number by a first year associate shuffling paper.

We care about our clients and treat them the way we would want to be treated! With over 30 years* dealing with insurance companies, we know how they think and we know how to get your case settled for the maximum amount possible.

Wills, Trusts, and Estates

When you need a Will, Trust, or Power of Attorney (POA), our goal is to give you peace of mind. We do that by carefully listening to you and then putting your wishes into the proper legal words. Our clients always comment on how easy we made the process because we explain how things work in “people language” not “lawyer speak.” We make the process of creating an estate plan simple and easy. But most of all, we give you peace of mind. 

Probate and Trust Administration

When a loved one dies you need help sorting through a lot of complicated issues like, do you need to open a Probate, Summary Probate, or can you settle the estate with a Trust Administration. We can lessen the burden by helping you make those decisions and also by making sure the rightful heirs and beneficiaries receive their inheritance. Handling an estate is complicated and if it is not done properly, you could be liable to heirs, beneficiaries, creditors for unpaid bills, and other liabilities for unpaid taxes and MediCal liens. We make the process simple because we advise you step by step. In your time of need, you need a reliable attorney you can trust and one that can make complicated legal issues simple to understand. 

Get a FREE Consultation with a Reliable Attorney TODAY!

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Meet the team

We are committed to treating our clients the way we would want to be treated.  You can rest easy knowing we will fight for and protect your interests. Whether you were injured in a car accident, hurt by someone, need help with a will, a trust, or need help with a probate or trust administration – we can help.

Reliable Attorney DiAna Law Group Jack V DiAna

John "Jack" V. DiAna


You can rest easy knowing we will fight to protect your interests.

Experienced Attorney DiAna Law Group Debra

Deborah Jean Taylor


Of all the awards I have won, there is nothing that compares to the satisfaction of hearing our clients breathe a sigh of relief. I care and our clients know I care.

Reliable Attorney DiAna Law Group



Everyone at DiAna Law Group has one purpose - to serve our clients the way we would want to be served.

Our Promise

“We treat our clients the way we would want to be treated.

Its the golden rule.”

- Jack Vincent DiAna


Jack went above and beyond for me even getting back to me when in an airport to reassure me during an emergency. He spent time explaining things to me and was very knowledgable. I was completely happy with the deal he negotiated for me - 100% satisfied and would highly recommend him!

Jose B
Happy client in Brentwood, Contra Costa County, California

Jack helped me acquire a business. He was great to deal with, was very knowledgable, and explained everything to me. I learned a lot from him, but most importantly, I could trust him 100%. He has great intentions and did a great job for me. I highly recommend him!

Proprietor SCY

Jack, has helped me on multiple occasions. Very knowledgable and upfront on many issues that I have had with a property management company. I highly recommend him as he is attentive and very helpful on many levels. I truly appreciate Jack, and what he has done to help alleviate my issues and stress! Thank you Jack DiAna!

Isabell Ch...
Bay area resident

"Jack and Jennie treated me very well. Jack consulted with me on very short notice and gave me very sound advice."

Alfred K...

When my personal injury case got down to the serious negotiation stage, I had 100% confidence Jack was going to take care of me and I felt protected. I can't describe it any other way, I felt protected. It helped eased the stress immensely. He handled a room full of lawyers, insurance company lawyers and other high power lawyers, like a pro. He never stopped fighting for my interest. In the end, what I got was so far above what they told me was their final offer and was extremely happy! I whole-heartedly recommend Jack!

D.A. Vallejo, Solano County, California
D.A. Vallejo, Solano County, California

I had been looking for a lawyer for several months. I talked with over 20 different attorneys and met with a dozen of them but when I talked to Mr. DiAna, I knew he was the right lawyer for me. He was an excellent listener and was very determined to win my case. He took a complex case and presented it in such a way that was easy for the judge to follow. Mr. DiAna went the extra mile and spent an extraordinary amount of time with me. He was always available to talk to me and answer all my questions. He is also a great coach so I knew what to expect at the trial. He is a very honest and trustworthy man. He fought for what is best for me and won my case!

D. Petrova - Concord, Contra Costa County, California
Very happy business litigation client

Recently won cases – Results that count

$100,000 settlement for our client that was rear ended on I80. Insuance only offered $13,000. We made the pay $100,000.

$500,000 settlement for a car accident by a driver that only had $15,000 of insurance coverage. Through diligence and persistence we got our client over $500,000.

A settlement of $28,000 for a cut in a motor vehicle accident.

$70,000 for an injured back in a slip and fall in a restaurant.

$91,000 from the City of Oakland for a fall on a sidewalk.

A dog bite for an amount that is protected by a confidential settlement. The dog owner was careless in restraining a dog known to be aggressive.

Settled a personal injury case against a large Bay Area corporation for an assault and battery on a customer.

$25,000 settlement from a car accident with a commercial vehicle.

Obtained favorable settlement terms on a California Proposition 65 case.

$35,000 for a fractured arm from a  fall in a bar.

$40,000 settlement for a car accident.

$85,000 for a slip and fall on a sidewalk poorly maintained in Fremont, California. 

Success depends on various factors. Each case is different and results vary based on the specific circumstances of the case.

One thing that does not vary – we fight for you!


This site is owned and managed by Attorney John (“Jack”) Vincent DiAna. The legal information provided on this site does not constitute legal advice or formation of an attorney-client relationship. * Any reference to the amount of experience refers to all experience, even in previous careers. The lead attorney, Mr. John DiAna was licensed to practice law in 2014 and has dealt with insurance companies as an agent and broker for the past 30 years in both personal and commercial lines. He has advised thousands of clients on all kinds of matters including business formation, management, coverage issues, mergers and many other commercial matters. His longterm and significant experience gives him real world experience in helping individuals and businesses navigate through legal issues and gives him an edge when negotiating on behalf of his clients.