Services About Our Approach Contact (520) 836-7947
Casa Grande, Arizona

Who will guard what you've built — and help it grow?

At O'Neil & Steiner, we pair decades of legal and financial experience with a commitment to your long-term security. Whether you're planning an estate, navigating business law, or building a tax strategy that actually works, we give you counsel you can act on with confidence.

Schedule a Consultation Explore Our Services
25+ Years of Practice
500+ Clients Served
AZ Licensed Attorneys
Professional office setting in Casa Grande
Legal documents on a desk
Trusted Counsel Since Established
Scroll to learn more
What We Do

Comprehensive legal and financial services, tailored to your situation

We don't believe in one-size-fits-all solutions. Every matter we take on begins with listening, then moves to a strategy designed around your goals.

Estate Planning

Wills, trusts, and comprehensive estate plans that protect your family's future and honor your wishes. We make the complex straightforward.

Learn more

Business Law

From formation to dissolution, we guide local businesses through contracts, compliance, disputes, and growth with practical, results-oriented counsel.

Learn more

Tax Strategy

Minimize liability and maximize returns with proactive tax planning. We work across individual and business tax needs with clarity and precision.

Learn more

Wealth Management

Thoughtful financial planning that aligns with your risk tolerance, timeline, and life goals. We help you build, protect, and preserve what matters.

Learn more

Civil Litigation

When disputes arise, we provide decisive representation in civil matters — from negotiation through trial — with a focus on the best outcome for you.

Learn more

Real Estate Law

Residential and commercial real estate transactions, title issues, landlord-tenant matters, and zoning — handled with attention to every detail.

Learn more
O'Neil & Steiner office interior
Casa Grande's trusted legal and financial advisors
About Our Firm

Rooted in Casa Grande. Committed to you.

O'Neil & Steiner was founded on a simple conviction: people in our community deserve legal and financial counsel that is both expert and personal. We are not a high-volume firm. We are not a call center. When you work with us, you work directly with attorneys and advisors who know your name, your situation, and what's at stake.

Our practice spans estate planning, business law, tax strategy, wealth management, civil litigation, and real estate law. Whatever your need, we bring the same standard — thorough preparation, honest communication, and a genuine investment in your outcome.

01
Integrity First We tell you what you need to hear, not what's easiest to say.
02
Client-Centered Your goals shape our strategy — not the other way around.
03
Community Focused We live here, too. Your success is our success.
Our Approach

A process built around clarity and confidence

01

Consultation

We begin with a thorough conversation — no pressure, no assumptions. You share where you are; we listen and ask the right questions.

02

Strategy

We develop a clear plan tailored to your objectives, explaining every option so you understand the path forward and the reasoning behind it.

03

Execution

We handle the details — documentation, filings, negotiations — with precision and care, keeping you informed at every milestone.

04

Ongoing Support

Our relationship doesn't end at closing. We're here for follow-ups, revisions, and the next phase of your planning — whenever you need us.

When I first came to O'Neil & Steiner, I was overwhelmed — unsure of where to start with my estate plan and worried about the cost. They took the time to explain everything clearly and made the entire process feel manageable. Years later, I still rely on their guidance whenever something comes up.

A Loyal Casa Grande Client Estate Planning & Wealth Management
Get in Touch

Let's start a conversation

Whether you have a specific question or simply want to learn more about how we can help, we welcome the opportunity to speak with you. Reach out by phone, email, or by visiting our office — we're here.

Office Address 318 E Cottonwood Ln
Casa Grande, AZ 85122

Request a Consultation

Fill out the form below and we'll get back to you within one business day.

Is this your business? This is my business