WTH Land Surveyors P.C. is family owned and New York State Licensed since 1989.

Why us?

Family Owned

William T. Holgan Land Surveying P.C. has been family owned and operated since Mr. Holgan became New York State licensed in 1989. We provide a high level of personal service and honest feedback regarding your project.

Certified Experience

Since 1989, William T. Holgan Land Surveying P.C. has built a highly regarded reputation within the industry, local government and surrounding community.

Competitive Pricing

While our pricing is fair, competitive and transparent, our level of service and industry knowledge is unparalleled.

Our Services

Title Land Survey & Mapping

Title Land Survey & Mapping for Property Purchase and Refinance

  • Boundary Surveys
  • ALTA Surveys
  • Legal Descriptions
  • Easement Locations
  • Encroachment Surveys
  • Fence and tree/shrub line location
  • Property line staking
Construction Land Surveying

Construction Land Surveying

  • Site Planning
  • Topographic Mapping
  • Benchmarks set
  • Foundation Staking and Location
  • Piling Stake outs
elevation certifcates land surveyor

Land Planning & Development

  • Subdivisions
  • Building Permits
  • CO’s and Compliance
  • Board of Health
  • Septic Design
  • Radius Area Maps
  • Lot Line Adjustments
FAQs - Long Island Land Surveyors

Elevation Certificates/LOMA (Letter of Map Amendment)

  • Flood Zone Determination
  • Building Elevation Determination
  • All elevations in North American Vertical Datum of 1988 (NAVD 88)
  • New York Rising

What our Customers are Saying

View all of our reviews on Google.

Great people to work with. They both were very thorough and knew their stuff. Highly Recommended.

Lilla Geremia Avatar Lilla Geremia
September 11, 2018

I was referred to William T. Holgan Land Surveyors through a friend. I called and they made an appointment to do my residential survey immediately. They showed up on time and were quite professional in all ways. Once the survey was done I was able to pick it up and they explained in detail what exactly what was what and what the diagrams were. I would highly recommend them to anyone looking to do a survey. 5 stars

August 26, 2020

We highly recommend this company. We had contacted other survey companies though we were very dissatisfied. Thankfully, I discovered this company. Both William and Leeanne have been courteous, professional, and interested in doing anything to assist us. William and Leeanne work most efficiently--in fact, we still are awaiting our permit and they have been the only ones to provide responses quickly and have made us feel at ease during the several months of attempting to obtain it.

Ross Schneider Avatar Ross Schneider
November 15, 2018