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Bill Insull | Colliers | Houston

Bill Insull


Senior Vice President

License # 416290

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Professional Summary

Bill brings more than 30 years of diversified real estate and business background to his approach to representing building owners. With more than 1,000 lease transactions completed on behalf of owners in San Francisco and Houston, he employs versatile, innovative approaches to creating, managing, and executing programs that target client and tenant needs to meet and exceed desired results. Bill's  primary focus is on office leasing and he has significant experience with industrial properties as well.

Bill’s approach to the business of commercial real estate ownership representation is that of a transaction-oriented and relationship-based self-starter. He employs an alert eye for identifying and executing pathways to capitalize on opportunities to reach goals by using effective sales/marketing, analytical, management, communication and interpersonal skills.

Bill earned his CCIM designation from the CCIM Institute. In his work for property owners, he has consistently outperformed market occupancy rates as exemplified by his work on behalf of Granite Properties, Inc. where he reached and maintained 99% occupancy on a five building multi-tenant office portfolio totaling ~ 1M SF.

Click here to visit the Houston Agency Leasing Group page. 


  • Real Estate Broker's License, Texas
  • Certified Commercial Investment Member, CCIM Institute
  • BBA in Real Estate & BA in Government, The University of Texas at Austin

Memberships & Involvements

  • CCIM Houston/Gulf Coast Mentor Volunteer (2019)
  • Habitat for Humanity Volunteer (2017-2018)
  • Spring Branch Memorial Sports Association Commissioner, Boys Senior Soccer (2012-2014)
  • Spring Branch Memorial Sports Association Boys Senior Soccer Manager (2011-2014)
  • Spring Branch Memorial Sports Association Boys Baseball Manager (2009-2014)
  • Heights-Norhill Little League Board of Trustees Member (2003)
  • Heights-Norhill Little League Boys Baseball Manager & Coach (2001-2008)


Service Lines

Landlord Representation

Property Type


My Team

Featured Research

Oct 18, 2021

Q3 2021 | Houston Office Market Report

The office market stabilized in Q3 as expected. Absorption was only very slightly positive, but the positive absorption reverses what had been steady declines. The COVID Delta variant definitely caused...
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Jul 9, 2021

Q2 2021 | Houston Office Market Report

Our office market continues to struggle to move to positive absorption in most submarkets, but there is a 6 to 12 month lag from decision to expand and actual occupancy. Our conversations with clients suggest the momentum has improved.
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Featured News

Oct 4, 2021

4411 San Felipe tops out and signs new lease with Ciel Restaurant + Lounge

Colliers is pleased to announce DC Partners is celebrating the topping off, a key milestone of the construction process for finishing the top floor, of 4411 San Felipe in Houston, Texas.
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Oct 2, 2021

Breast Cancer Awareness Month

Our Colliers Houston office is taking part to honor our very own Cindy Gise, Marsha Lilly and everyone who may currently be fighting the battle, survivors and those who have lost their battle by wearing pink every Friday.
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