Keystone Custom Builders

About Keystone

Keystone Development Corporation is a full service real estate development and construction company specializing in multi-family development and custom built single family homes. Our Massachusetts based company and its affiliates have been developing real estate since 1975. Michael Staiti and Rick Olstein, the current owners, have been involved in the permitting of over 500 residential units, the construction of more than 200 homes and the acquisition and development of over 1 million square feet of commercial real estate. Keystone's principals are personally invested in each and every project they undertake. This hands on approach and attention to detail has led to a strong record of successful commercial and residential projects and ensures Keystone Development's success in the future.

Keystone's expertise encompasses all facets of land use analysis, site design, permitting and approvals. Keystone is experienced in raw land development as well as the adaptive re-use of existing property. Keystone Development manages the entire development process. From site acquisition and design through permitting and infrastructure construction, we assure a seamless and successful project from start to finish.

Keystone's has extensive experience in all aspects of residential design and construction from moderate, smaller homes to luxurious estates to attached townhomes. Keystone believes that every building site is unique, and that elements such as topography, directional exposures and natural site characteristics must be considered in designing a home. The final result of these considerations is a harmonious relationship between a house and the land on which it sits.

Keystone combines old world quality and craftsmanship with modern technology and building innovations to create superior homes. In 2007, Keystone undertook an ambitious program to become a 'Green Builder' becoming the first certified Earthcraft House builder in southeast Georgia and joining the Build Green Massachusetts council as a founding member. Keystone's owners and project managers are all Certified Green Professionals, a new certification from the National Association of Home Builders, confirming Keystone's expertise and commitment to Green Building. In addition, Keystone has committed to meeting Energy Star certification in every home it builds. Keystone's commitment to Green Building techniques and use of sustainable resource materials provides a home that is highly energy efficient and environmentally conscious. Keystone is able to implement these innovations without compromising the character and integrity of traditional design and architecture.

Keystone also has a strong background in commercial and industrial development. Keystone's principals, through their affiliate WRT Management, own and manage a substantial commercial portfolio of real estate which includes office, warehouse/distribution, manufacturing, R & D and retail properties. WRT typically acquires older, underutilized properties and through adaptive renovation is able to re-position them as viable real estate assets. Keystone understands the challenges inherent in redeveloping older properties and is experienced in the renovation, environmental clean up and the modernization of older properties. Keystone Development has a proven history of creating value in underutilized commercial property.

Keystone is a full service construction management firm. Keystone employs an experienced staff of project managers, site supervisors and construction personnel, whose construction expertise range from single and multi-family residential building to large scale commercial projects. Keystone manages all aspects of construction including site and infrastructure development, building construction and final finishes. Keystone works closely with architects, engineers and local officials to navigate the obstacles inherent to the construction process. We also maintain close contact with customers during construction to keep them involved and informed as their new home or building is being built. The result is a cohesive and efficient process that allows Keystone Development to deliver the quality product our customers deserve.

Thank you for considering Keystone for your next project or new home. We take great pride in everything we do, but especially in creating 100% customer satisfaction.

We understand that whether you are building the home of your dreams or an industrial facility for your business, this purchase will affect you for years to come. We also realize that each project is unique and deserves to be treated as such. We listen carefully to your needs and use our extensive expertise to turn your dreams into reality.

Keystone's owners and staff work hand in hand with homeowners and businessmen from start to finish, providing necessary information and addressing concerns as they arise. We provide you with confidence and satisfaction throughout the building process and after you have moved in.

Thank you for taking the time to get to know us better. Our quality, value and service is why homeowners and business leaders choose Keystone Development Corporation to build their new home or commercial project.


  • National Association of Home Builders (NAHB)
  • Builders Association of Greater Boston
  • 50+ NE Housing Council
  • Marlborough Regional Chamber of Commerce
  • Blackstone Valley Chamber of Commerce
  • Build Green Massachusetts
  • Energy Star Program
  • Earthcraft House-Greater Atlanta Home Building Association
  • Massachusetts Realtor Association
  910 Boston Post Road    Marlborough, MA 01752   |   508.229.7827    |   |   site map