Phelps & Associates Land Surveyors provides professional land surveying services for both routine and challenging projects.

For over 30 years, Phelps and Associates Land Surveyors has served Sonoma, Marin, Napa and Mendocino counties.  We have knowledge and experience in over 4,000 land parcels in the North Bay.  Our team can provide clear answers concerning your property.  The long history and rapport we have with local agencies and other experts allows us to effectively navigate your project through to completion.

We are licensed by the Board of Professional Engineers and Land Surveyors.  Our field equipment consists of the latest in electronic theodolites with built-in distance measuring capability, along with real time kinematic Global Positioning System receivers. 

We have excellent esprit de corps, the staff are truly competent, and we zoom...


Services often utilized by our clients include:

  • Boundary Retracement
  • Topographic Mapping
  • Subdivisions
  • Construction Staking
  • ALTA Surveys
  • GPS
  • Lot Line Adjustments
  • Aerial Mapping Exhibits
  • Elevation Certificates
  • Expert Witness for Litigation


Our office is located at 632 Petaluma Avenue, Sebastopol
Hours: 8:00am-5:00pm Monday-Friday
Call (707)829-0400