About our company & our team

Our history

Double Diamond Construction and Development, LLC, its Principals, and Officers, have individually and together completed nearly half a billion ($500 million) in development and construction over the past 20 plus years.  The majority of this development has been in the affordable multi-family segment of the market.  Our output to date is nearly 4.100 units.  We have successfully developed units in three states (Illinois, Missouri, and Kentucky) and have a phenomenal track record of being on time and on budget.

Patrick W. Werner and Robert C. (Chad) Hartle, founders of Double Diamond, together with Gregory A. Lee and Nathan E. Leoni, pride themselves on being very communicative and cooperative with stakeholders, especially pertinent governmental entities.  Our track record and references will vouch for our willingness to “do the right thing, not the easy thing.”  Our development experience allows us to provide that element of support during the pre-planning and pre-development phases.

Our team has extensive experience in working with MHDC and its development/construction.  process.  This includes meeting all requirements concerning MBE/WBE, LIHTC, Davis-Bacon Wage Requirements, State Housing Agency Construction Compliance, Section 3, and Green Certification.  Our team has built nearly a dozen affordable developments which are to Green Standards or Green Certified.  A few of these developments have won awards and our team members are regularly asked to speak at industry events on Green Certification, Universal Design, and other aspects of affordable development.

Safety & timelines

Double Diamond Construction & Development, LLC is committed to job safety.  We have an OSHA certified10 and 30-hour trainer on staff who has an outstanding safety record.

“Although production is our push, safety is our priority. With a certified OSHA 10 and 30-hour trainer on staff, Double Diamond Construction performs safety training courses upon scheduling.

Most importantly, we strive to maintain safe job sites through daily foreman coordination, weekly toolbox safety meetings, routine safety evaluations, and audits, a thorough safety manual, and a knowledgeable, trained superintendent at every job site.

We work very hard as a company to ensure everyone associated with our projects, go home as they came, at the end of every working day.”


Double Diamond Construction & Development understands the extremely sensitive times associated with LIHTC developments.  Our timeline starts with the initial consultation with the client.  We continue to fine-tune the timeline through the development process, to ensure that the development is completed on time to avoid costly adjusters being imposed upon the owner.  References are available upon request.

Patrick Werner

General Partner

Business Experience:

  • CHAIRMAN OF C.N.A. Insurance Company – Agents Organizer for the St. Louis, MO area
  • FUNDRAISER – YMCA Youth Campaign
  • 1968 – 1975    Partner in  – Construction Co.
  • 1975  –  2001  Organized and managed Custom Insurance Services, Inc.
  • 1996  –  2013  Developed and or constructed twenty-five Affordable Apartment Complexes
  • Sold my ownership in Custom Insurance Services, Inc. in March 2001
  • Sold my ownership in Central City Financial Services, Inc. in March 2001
  • 2003 – I have 50% ownership in Double Diamond Construction & Development LLC, a general contracting business.

This business has completed seventeen apartment projects and has Five under construction. Two of the projects that were completed in 2009 and 2010 were Adaptive Reuse of a Historic Schools. Read more

Chad Hartle

General Partner

Robert Chadwick “Chad” Hartle first became a general contractor in 1992 when he started building affordable housing developments.  In 2003 he and Patrick Werner co-founded Double Diamond Construction.  Since its inception Double Diamond has completed construction jobs totaling over $150,000,000.  As a result of its founder’s broad background in the industry, the company’s primary focus is on the construction of affordable housing.  Double Diamond not only performs general contracting but also provides ‘value-added services’ to affordable housing developers through the decades of experience its upper management team brings to the table.  In addition to affordable housing, it also builds market-rate apartments, commercial buildings, single-family homes and performs adaptive re-use of historic buildings. Read more

Nathan Leoni

Project Manager

Title:  Project Manager, Double Diamond Construction
Degree:  Bachelor of Science – Construction Management, Southeast Missouri State University, Cape Girardeau, MO

Experience:

  • Surveyor’s Assistant, Koehler Engineering and Land Surveying, January 2007 – December 2008
  • OSHA 500/510 – Midwest OSHA Education Center Certified OSHA 10 & 30 Hour Trainer – January 2015
  • Pursuing Certified Health and Safety Official Designation – Anticipated Completion, January 2016

Amber Werner

Office Manager

Greg Lee

Business Development Manager