Don’t just believe us...

The Costello way is evidenced by the exceptional service we provide to all of our clients. Based on their comments, our clients feel the difference when they walk through our doors.

Costello’s corporate philosophy is built around responsiveness and commitment to clients. In business for 30 years, our growth has been fueled largely by repeat business, demonstrating our quality of work and responsiveness to clients. We have assembled some of our favorite client testimonies for your review:


We trust Costello; the company and the individuals. They are committed to the success of our projects and their execution is the best I have experienced.

Jordan Mack, Principal

Concourse Development

Costello does such a great job on Expedited Bond Applications. It makes our lives easier and the applications sail through the TCEQ.

Lynne Humphries

Allen Boone Humphries Robinson LLP

The Costello Engineering team has repeatedly gone the extra mile in not only designing and executing solutions to drainage and flooding problems encountered by our client (specifically, repeated flooding in 2016 and 2017), but they have also been instrumental in locating and helping the client apply for and secure grants to fund the projects, some of which would have otherwise been unachievable. Costello’s expertise and resources allowed our client to punch outside of its weight class for the betterment of a community.

Joel Cleveland

The Muller Law Group, PLLC

As land developers we have been pleased to be able to utilize the services of Costello for over 10 years. We fully intend to utilize the firm in many of our future projects.

David A. Cannon

Trend Development

I have used Costello, Inc. as my lead consulting civil engineer for more than twenty years, including on very large communities. Their service is timely, professional, and on budget. In addition, they think like developers.”

Jimmie F. Jenkins, Vice President, Master Planned Communities

Toll Brothers

Costello, Inc. has provided very efficient engineering service to our LID for many years. We depend on them for their engineering expertise and judgment. They are a highly competent engineering organization that is very responsive to their clients’ needs.

Kalapi Sheth, President

Fort Bend County Levee Improvement District No. 19

Working with Costello on each of our Developments is truly a TEAM effort. The entire company’s resources are made available to develop the Best solution for each community.

Steve Tennis, Vice President of Development

Concourse Development

Costello’s team demonstrates professionalism and excellence through actions, not words. They return calls quickly; they meet deadlines; they solve difficult problems with cost effective solutions; and they promote opportunities for women and people of color who are often under-represented in our industry.

Nancy Carter

The Muller Law Group, PLLC


Get started with Costello today

Learn why working with Costello has created long-term clients, word-of-mouth referrals, and new business all over the Houston region and beyond.