“We are so happy we hired Hammerstone Builders for our kitchen renovation.  Maria Klemperer-Johnson, the company owner, worked with us on the design, drafted the specifications for the cabinet construction, and did the installation of both the cabinets and the tile backsplash.  She is a real find: her work is excellent, with meticulous attention to detail.  We especially appreciated her problem-solving ability.  Our project presented special challenges because of our old, uneven masonry walls, but she was great at finding creative solutions.
Maria is a pleasure to work with: upbeat attitude, arrives as scheduled, returns calls, leaves the worksite clean each day, and is good at estimating time.  And… she listens!  She is patient and makes every effort to please.  Christina and Miwa, who assisted her, are also pleasant and efficient.  Her fees are very fair.  I speak from years of experience with contractors, and my standards are high, but I recommend Hammerstone Builders unequivocally.”
–Barbara, Ithaca, NY
“[Maria] is an OUTSTANDING timber framer..who helped us build our house. If you are interested in learning from not only a talented carpenter but a really good person who is dedicated to doing things right…the first time please learn from Maria. I am thrilled to know she is teaching!”
— Joanne and Deborah Cippola-Dennis, clients
“Maria was on the timber-framing team that community-built the vendor pavilions for Trumansburg Farmers Market & the local community in 2010. She knows her stuff and she’s a good communicator!”
— Deirdre Cunningham, Market Manager at the Trumansburg Farmers’ Market
“Knowing and working with Maria and witnessing her projects, and the teams she has lead, people in this course will be present to an extraordinary learning environment. This is an opportunity to access excellence.” 
— Ben Boynton, owner of Red Barn Cabinet Shop
I have watched Maria closely working for several months on my own house. She is extraordinarily skillful and resourceful at dealing with every kind of situation and is an effective leader of her team. She is surely a terrific teacher, given her temperament, and I only wish that I could have sent my daughters to study with her.
— Don Randel, Ithaca homeowner