About Green Monster Landscapes

Mark Arsenault began Green Monster Landscapes, LLC in 2003 by installing walkways and patios with little more than a shovel and wheelbarrow. The business grew quickly, necessitating the addition of employees and equipment.

Today, the Green Monster Landscapes team consists of dedicated landscape professionals who are skilled in the areas of landscape design, stone masonry, hardscape installation, planting installation, fine gardening, irrigation, low-voltage landscape lighting, site construction and grading. The company is fully equipped to perform all of services on a turnkey basis; allowing them to control the quality of work and ensuring their clients receive nothing less than perfection.

No one is going to work harder to make you happy. Period. At Green Monster Landscapes, we take an incredible level of pride in our work and settle for no less than perfection from ourselves.

– Mark Arsenault

  • We offer a one-year warranty on all plant material.
  • We offer a five-year warranty on hardscape installations.
  • Free estimates on all services. Estimates are tailored to your particular needs at no additional cost.
  • We offer a variety of payment options. With financing plans, monthly billing, maintenance packages, we can help you stay on budget.
  • Interesting and creative landscape designs.
  • Extensive knowledge in hardscape, horticulture, irrigation, and all other areas of our service palette.
  • Fully insured with Liability and Worker’s Compensation insurance. Don’t risk your largest investment with an uninsured landscape provider!
  • Continuing education and employee training: We’re always on top of industry trends and changes. Our off-season is spent at trade shows, seminars, and training classes.
  • We are nearly self-sufficient and resort to subcontracted services only when absolutely necessary. When subcontractors are required, we have a tight network of contractors that we know and trust.
  • We use top-quality commercial equipment: All the equipment in our fleet is reasonably new, and on a strict maintenance schedule. We invest in state-of-the-art technology that makes our jobs more efficient.


No, we are exclusively a Landscape Design-Build firm.

As much as we would like to, this is impossible. There are too many variables with design-build projects. We have to inspect the site, take measurements, and most of all get a sense for what you want. However, after meeting with you and inspecting the site, we will be able to talk budgetary numbers.

We do not offer landscape design as a stand-alone service; nor do we necessarily create one for all of our projects. We may produce a planting plan, scaled drawing, or just a concept sketch – however, this is determined on a project-by-project basis.

Generally, we will travel up to a 30-mile radius from Dover, NH. Many of our projects are in New Hampshire Lakes Region towns like Alton, Wolfeboro and Wakefield, and NH seacoast towns like Dover, Durham, Portsmouth, Hampton, Newfields, and Rye.

Yes! Weather permitting, we install permeable pavers, build dry stack stone walls, and also install interior stone veneer work.

We do not install swimming pools; however, we have managed many backyard pool projects. We can provide the electricians, plumbers, and even the pool installation contractors if needed. It makes sense to hire the landscape contractor as the GC because we are there for the duration of the project.

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