Innovative Design-Build Solutions for the

Pioneer Valley Since 1991.

Integrity’s reputation for fine craftsmanship and exceptional customer service has been recognized in the Pioneer Valley for over 25 years. “Integrity” is more than a name. It’s a promise, and it applies to the designs we create, the financial expertise we demonstrate, and the exemplary service we delivery with every job.
  • Integrity Is Founded in 1991

    Integrity was originally founded by Peter Jessop in 1991. Integrity’s first mark in the Pioneer Valley came with the completion of 32 homes in Amherst in 1994. This development, known as the Pioneer Valley Co-Housing community, was one of the first communities of its kind in the eastern United States.

  • Anna Cook and Heidi Flanders Become Owners

    In 2012, Anna Cook and Heidi Flanders assumed ownership of the company. Today, Anna serves as the Principal Project Manager and Heidi is the Principal Designer. 

  • First Passive House Construction

    In 2016, Integrity completed the construction of a GO Logic-designed house in Amherst. The project received a Passive House Certification, the first of it’s kind in the Pioneer Valley and one of only a few in Massachusetts.

Pillars of Our Company Culture


Trust is at the center of our office culture and our client relationships. We are committed to fostering this confidence between our team members and clients by maintaining open, honest communication.


Creativity permeates our approach to both design and construction. Our designers are skilled in creating custom architectural solutions and our build team excels in innovating ways to construct these design solutions.


We’re experienced with net-zero construction and LEED Certification, as well as designing for a wide assortment of eco-friendly building systems. We support and encourage all our client’s environmental goals and are committed to helping achieve them.


One of Integrity’s core values has always been to support the growth and well being of our surrounding communities. We are strong advocates for and supporter of dozens of non-profits and charities each year. 

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