About Us

GMG Group was founded in 1991 by Ettore Guarracino. After learning the art of renovating, remodeling and new construction in both the residential and commercial Boston markets, Ettore’s son Pasquale took over the family business in 1999. He gave the company its current name in 2013, expanding the company’s capabilities by strengthening its core of expert employees and subcontractors.The new name reflects Prime’s sound commitment to being the number one residential contractor and commercial developer in Massachusetts for customer service, craftsmanship, creative problem-solving and fostering client relationships that are built to last.


At Prime, our “no-nonsense” philosophy means that every one of our team members and subcontractors operates with the same commitments to excellence:

  • Client and worker safety are paramount (every work area is protected with the highest degree of safety measures)
  • Go the extra mile for every client and each detail
  • Show up on time for every job, every day
  • Keep the work environment clean and classy (there’s never yelling or foul language used on our worksites)
  • Maintain open, honest communication with clients at all times
  • Solve problems with flexibility, patience, intelligence and a collaborative spirit
  • Make every decision with the end result – perfection - in mind


From residential additions, remodels and new construction to commercial demolition and development, at Prime we pride ourselves on bringing excellent craftsmanship to every detail. With over 30 years of construction experience in the greater Boston area, our clients benefit from our unparalleled knowledge of specialty building materials and local permitting and work ordinances. Our relationships in the industry are with the finest craftsmen, tradesmen and subcontractors in the Commonwealth. From custom stair railings for your home to building a heavily branded chain restaurant franchise, our team has the experience to get the job done right.


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Our Team

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Owner & President

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Owner & President

Prime Building’s Owner and President Pasquale Guarracino began his hands-on field experience in the industry in the early 1990s. In 1999, Pasquale took over the family business and continues to expand Prime’s capabilities for residential and commercial projects.

  • MA CSL 078468
  • MA HE 087997
  • MA HIC 176678
  • OSHA 30 Construction Safety and Health 11-600520829
  • RRP Lead Safety Compliance  201205120-RSI-05
  • Wentworth Institute Continued Education Courses:  Plan Reading, CSL Prep Class, Stair Building, Roof Building
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Project Manager

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Project Manager

Project Manager Joseph Gearhart has almost two decades of construction and project supervision in the New England area. He graduated from the Windham Regional Vocational Technical School in Willimantic, Connecticut, where his studies had an emphasis in Architectural Drafting and Design.

Joe began his career framing custom homes for eight years in the Connecticut suburbs before moving to South County, Rhode Island where supervised everything from large renovations in Jamestown and Newport to large multi-unit condo project installations. In 2006, Joe moved to Boston where he worked with several general contractors before finding his home at Prime Building in 2012. Some of his recent work includes:

  • A 10,000 square foot LEED Certified green home in Lincoln, MA
  • Several custom homes in Weston, MA including a 7,900 square foot home at the Weston Country Club
  • A software lab in Kendall Square, MA
  • Office renovations for multiple nonprofit agencies in Boston and Cambridge, MA
  • MA CSL 95563
  • MA HIC 163284
  • OSHA 10 Hour Construction Safety Compliance 001116223
  • RRP Lead Safety Compliance EPA 40 CFR part 745.225 R-I-29085-10-05-213870.00-8252

What our clients say

  • "As a Designer I have worked with Joe on both new construction and large renovation home projects. He is a delight to work with because he stays focus on the teams goal and is 100% always looking out for his client.What makes Joe Gearhart at Prime Builders & Development so valuable on your next project, is that he sees the Big Picture, but in very small minute details from the beginning to the end. Clients talk about their projects with compassion, emotion and focus on their dreams for the space in the future. It is the Design team and Contractor’s responsibility to layout the road map. Joe’s breathe of knowledge in construction enables him to give you a realistic idea of cost and options to get you where you want to go. His on hands management of projects is in my mind an insurance to you that no matter how big the project is no detail will be overlooked. "

    Susan Brisk

    Euro-Plus Design of Wayland

  • "Joe Gearhart and his team is the only team I would trust to work with and deliver on ANY construction project or renovation whether new or existing. I have worked with Joe for the past 3 years with various Investors and small business clients from Multi-families to 8 story apartment complexes. Each time, Joe Gearhart’s process is one of great collaboration with his team of specialists and he works tirelessly to ensure things are done right, on time and on budget. His quality of his workmanship and attention to detail is second to none. If you want the best General Contractor to ensure your next building or home, then call Joe & Prime."

    Kim Clark

    Commercial Real Estate Agent

  • "Joe and his crew are highly skilled, honest as the day is long, dependable and nice to work with. I trust them above anyone else to deal with whatever upgrades and repairs my house needs and give them the highest recommendation – 5 stars. "

    Ann Lees

    Resident | Brookline, MA