“We hired Cornerstone to convert our landscaping to a drought-tolerant configuration and were extremely pleased with the results. The estimate Gregory provided was reasonable and the work was completed on schedule, on budget and consistent with the plan. If and when glitches arose, Gregory was always responsive and dealt with issues promptly and fairly. The crew was organized, thorough and diligent. They were a pleasure to deal with at every level, from Gregory on down. We could not be happier with the outcome and would recommend Cornerstone without reservation.”

– Robert B., Homeowner

“I have been a landscape designer for almost 20 years. Gregory has proven to be the most reliable and communicative contractor I have worked with in that time, as well as the most positive and personable. Having him install my projects makes my life easier. I trust both his intentions and his expertise in executing my designs. His bid prices are reasonable, and he is extremely open and honest about his pricing. His crew is hard-working, knowledgeable and easy to communicate with. Gregory is a man of upstanding character and talent, and he is always my first choice when I need a contractor to install a job.”

– Arianna J., Landscape Designer

“We hired Greg on the heels of a zoning issue that we needed amended in our backyard. He was very creative in his design, helpful on every level of planning and executed the project beautifully with a prompt and courteous crew. Our project ended gorgeously and we couldn’t be happier. We’ve referred him to many others and will continue to do so. Thanks Greg!”

– Sara C., President of Radiant Organizing

“We had some long-term drainage issues to fix and at the same time wanted to take the opportunity to upgrade our landscaping. Cornerstone brought in a landscape architect, created a beautiful plan, and worked off of it very well. They were efficient, full of helpful suggestions and great ideas. And they did not simply execute from plan, in fact we ended up with a landscape that extended the plan in several significant ways including a new perimeter fence and new flagstone entry with a bridge over a dry creek bed. Gregory was always available to discuss options and issues, and the staff was very professional and courteous. We are very happy with the result!”

– Jerry N., Homeowner



“Gregory Hyman, and his crew at Cornerstone Landscapes, were an absolute dream to work with. Gregory is highly knowledgeable about drought-tolerant landscaping and infrastructure to make every drop of water go the furthest. We asked for Gregory’s help in designing and installing a driveway that would comply with City codes but also be decorative and beautiful, installing a laundry-to-landscape greywater system, and roof, surface drains and French drains all that tie into infiltration basins to keep our water on-site! He designed and installed a complete drought tolerant landscape conversion of our front yard as well. 

He is technically proficient, creative, diligent, and so respectful of his clients’ time and money, not to mention a kind and thoughtful person. It was a pleasure collaborating with him on design ideas, and his budget and time-frame estimates were spot-on. He was present at the job-site to supervise, and his foreman and crew members were incredibly professional and proficient, and I liked working with them just as much as with Gregory. You will be so pleased if you choose to work with them!”

– Amy D., Homeowner

“We just completed the second of two phases of our yard renovation with Cornerstone Landscapes, which were the last of many renovations to our entire property. The work we’ve done with Cornerstone has been the easiest, smoothest and most problem free by far. I recommend Gregory Hyman highly, both professionally and personally. As a contractor, his approach is top level: his attention to detail, timely responses, clarity of communication, vision, approach and problem solving are outstanding. There were times by the end of the second project, as I was time-short, that I left decisions completely in his hands, and was never disappointed. I trust the quality of his work; his knowledge far exceeds normal expectations, especially in key areas such as water preservation, drainage, excavation and grading, fencing, and irrigation. 

He also has an excellent understanding of plants and trees. He took on many construction issues such as: project coordination and management, trellises, stone work, wall construction, hardscape and outdoor living spaces, paths, fireplaces and fire pits and managed other contractors in areas such as pool renovation, sewers, gas and electrical. His team is top level; all very polite, respectful, unobtrusive and hard working, with every detail attended. Given his professional approach, and combined with a great team, you can’t go wrong in hiring Gregory and his team.”

– Tony O., Homeowner

“If you are looking for landscape experts and crew that show up when they are supposed to, know what they are doing and are delightful people to work with, Cornerstone is the one for you. With Gregory’s help we have made our property something we are proud of and have enhanced the value of our home.”

– Laura R., Homeowner

“As a former contractor, I am very particular about the people with whom I work. Gregory is extremely professional, communicates well and is very conscientious. His work was performed quite efficiently and I found the quality of his work product to be excellent. Since working for me, I have recommended him to several people, and I would not hesitate to contract with him again for my next project.”

– Bill S., Consulting Arborist

“We took on a substantial landscape project that took several months to complete due to the scope of work, and Gregory and his team did not disappoint. Gregory’s communication and follow-up were outstanding and anytime we had questions, concerns, or wanted to make changes or additions, he and his crew were extremely responsive. The quality of work in all facets was also outstanding. Our project included design, hardscape, retaining walls, planting and irrigation, raised garden boxes, fences, a new driveway, and a fire pit, all of which turned out great! Gregory would not be happy until we were 100% satisfied! It is very refreshing to work with someone who values integrity and is genuinely concerned about customer satisfaction. I would highly recommend Cornerstone Landscapes to anyone!”

– Bob L., Homeowner

“Gregory Hyman of Cornerstone Landscapes came highly recommended by a longtime friend and contractor. It is a pleasure to work with someone as competent, honest and ethical as Gregory, and I would highly recommend him for any landscape-related project.”

– Bob S., Homeowner