About GWJ Boss Construction

At GWJ Boss Construction

We’re more than just a construction company — we’re a team of craftsmen committed to building things the right way. With decades of combined experience, our mission is to provide Salem, NH homeowners with reliable, high-quality general contracting services they can count on.

Founded on the principles of honesty, precision, and work ethic, our company has earned a reputation for doing things right the first time. Whether we’re framing a new garage, installing a roof, or remodeling a kitchen, we approach every job with the same level of care and dedication.

A Local Company You Can Trust

We’re proud to be locally owned and operated out of Salem, New Hampshire. This community is our home, and every project we take on reflects our commitment to our neighbors. We understand the challenges of New England weather, local permitting requirements, and what homeowners in this area value most — quality work that stands the test of time.

When you hire GWJ Boss Construction, you're working directly with owner Gary Johnson and a small, highly-skilled crew that values your time, your home, and your satisfaction.

Our Core Services

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Roofing

We deliver durable roofing solutions that protect your home year-round. From tear-offs and replacements to repairs and flashing, our crew handles it all.

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Siding

Our siding work enhances curb appeal while boosting insulation and energy efficiency. Choose from a variety of styles and materials for the perfect fit.

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Framing

Every great project starts with strong framing. Whether it’s new construction or a structural upgrade, we provide expert craftsmanship from the ground up.

A gray house with a white garage door and a porch.

Remodeling

From modern kitchens to cozy basement renovations, we help homeowners reimagine their space with thoughtful design and flawless execution.

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Additions

Need more room? We design and build additions that blend beautifully with your existing home — function meets style.

Our Commitment to Quality

We don’t take shortcuts — and we don’t disappear after the job is done. At GWJ Boss Construction, customer satisfaction is our priority from day one. That means:

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Clear, honest estimates

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Respectful crews who keep job sites clean

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Transparent communication at every step

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Work that meets or exceeds code and industry standards

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Projects delivered on time and on budget

 Hear What Our Clients Say

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"Gary and his team built our addition exactly how we envisioned it. They kept everything on schedule, cleaned up every day, and the final product is beautiful."

Michelle R., Facebook Review

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 "I've worked with a lot of contractors and Gary is one of the best. He’s honest, responsive, and the quality of his work speaks for itself."

Tom G., Facebook Review

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 "They remodeled our kitchen and we couldn’t be happier. They treated our home with respect and finished everything right on time."

Laura D., Facebook Review

FAQs About Our Company

  • How long have you been in business?

    GWJ Boss Construction has been serving the Salem area for many years, with decades of combined experience in the construction industry.


  • Is GWJ Boss Construction licensed and insured?

    Yes, we are a fully licensed and insured general contractor operating in New Hampshire and surrounding areas.


  • Do you provide free estimates?

    Absolutely. Every project starts with a free, no-pressure consultation where we listen to your goals and provide a clear, fair estimate.


Contact Us Today

Want to work with a contractor who delivers on promises? Choose GWJ Boss Construction for honest service and top-tier craftsmanship.

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 General Contractor | Salem, NH

Contact Us

Serving Southern New Hampshire & Northern Massachusetts

Open 7 Days a Week | 8:00 AM – 7:00 PM