McMahon LaRue Associates

Engineers & Surveyors
We refer to our firm as the right-sized engineering and surveying firm. Our education and years in the industry give us breadth and depth of services to offer our clients. At the same time, we are small enough to be able to be responsive to our clients when they call on us in time of need. We have the ability and flexibility to meet aggressive deadlines.

President Greg McMahon and Vice President Al LaRue are working toward a quarter-century as co-owners! Longevity shared in the region, within the industry, and working together make McMahon and LaRue strong in their fields. Their hands are on the projects with a high-level of experience.

Our service reach is beyond Rochester, throughout Monroe County and the surrounding counties. - Orleans, Genesee, Livingston, Ontario, Wayne. We know this land well and can quickly educate those we serve about the areas of need. McMahon’s work is grounded in Western and Central New York. LaRue’s reach spans from Lake Ontario to the Finger Lakes, and beyond to the Genesee River, St. Lawrence River, Hudson River, Mohawk River and Upstate regional streams and creeks. We cover most of New York state delivering FEMA services.

Customers come back for the firm’s experience, thoroughness and completeness, understanding of the discovery process, and sensitivity to closing times and deadlines. Skills tapped include:
  • Civil Engineering
  • Structural Engineering
  • FEMA Services: flood plain issue surveying, etc.
  • Instrument Surveys (Residential/Commercial)
  • Property Stake Outs
  • ALTA/NSPS Instrument Surveys
  • Site constraint management (zoning, soil wet lands/floodplains, etc.)
  • Soil knowledge
  • Expert Witness

We Serve:



We are presented with legal issues involving property lines, property and fence disputes, preparation for land transactions, refinancing, and development opportunities.


Site engineers, civil engineers, and surveyors are needed by architects

Developers/ Builders

Developers need us when they are interested in a parcel of land or are trying to grow their business into out-of-town parcels in our area.

City/ Town Planning

Site planning and site designs are what we deliver to City/Town Planners for their review and approval.