Aerial view of a surveyed Hawai'i parcel
Est. 1975 · Kailua-Kona, Hawaiʻi · Licensed Professional Surveyors

A Tradition of Excellence
in Land Survey and Planning

Serving the Hawaiian Islands and the Pacific Basin since 1975 — from precision boundary, topographic, and shoreline surveys to subdivision design and entitlement support.

Our Services Order a Survey
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K-1 Boundary Stakeout· K-2 Encroachment Surveys· Topographic Mapping· Shoreline Certification· Elevation Certificates· Subdivision· Construction Stakeout
Our Track Record

Trusted across Hawaiʻi Island’s
premier properties

Our team has performed land surveying, land planning, development, and related professional services at many of Hawaiʻi Island’s most exclusive resort communities, largest properties, and most important public facilities.

Kohala Coast Resorts

  • Mauna Kea Resort
  • Mauna Lani Resort
  • Waikōloa Beach Resort
  • Hualālai Resort
  • Four Seasons Resort Hualālai

Private Communities

  • Kūkiʻo
  • Kohanaiki
  • Kaʻūpūlehu
  • Hōkūliʻa
  • Puakō

Kona & Public

  • Kailua-Kona
  • Keauhou
  • Kona International Airport
  • Federal / State / County
  • Military properties

This work includes some of Hawaiʻi Island’s most valuable real estate, largest master-planned communities, premier luxury developments, and most technically demanding public and private properties.

Our Story

Surveying Hawaiʻi.
For half a century.

Since 1975, Wes Thomas Associates has dedicated itself to the discipline of land surveying. This singular focus has allowed us to refine our staff, equipment, and methods around one specialized profession — and complete thousands of survey projects across all the major Hawaiian Islands.

Our office in Kailua-Kona on the Big Island is led by President and Chief Surveyor Chrystal Thomas Yamasaki, LPLS. Our principals together bring more than 100 years of combined surveying experience in Hawaiʻi and the Pacific Basin.

50+
Years of Practice
1000s
Survey Projects
100+
Years Combined Staff Experience
LPLS
Licensed Professionals
Kailua-Kona, Hawaiʻi 96740
WTA surveyors at work on an instrument
Discipline 01

Land
Surveying

Boundary, topographic, shoreline, and elevation surveys across every major Hawaiian Island since 1975.

Explore Surveying →
Developed Hawai'i property framed by palms
Discipline 02

Land
Planning

Subdivision design, lot-line strategy, and entitlement support — turning raw parcels into buildable, permit-ready land.

Discuss a Project →
What We Do

Our expertise
across the islands

The full range of professional land surveying services for homeowners, real estate professionals, lenders, engineers, architects, and government — performed across all the major Hawaiian Islands.

K-1 Boundary Stakeout
Marking your parcel corners and lines for the Real Estate Purchase Contract Item K-1. The basic stakeout that confirms what you’re buying or selling.
K-2 Encroachment Survey
K-1 plus a perimeter encroachment check (vacant lots) or setback & encroachment check (lots with structures) — with full map and report.
Topographic Survey
Elevation and feature mapping for site design, civil engineering, architecture, and permitting. Detailed terrain captured to your specifications.
Shoreline Certification
Coastal boundary surveys and certified shoreline determinations per State of Hawaiʻi Shoreline Setback regulations. Required for coastal permitting.
Elevation Certificate
FEMA Elevation Certificates for flood insurance, building permits, and mortgage lender requirements — prepared by licensed Hawaiʻi surveyors.
Subdivision & Lot Line
Subdivision surveys, lot consolidation, and lot line adjustments — with full County and State filing support.
Survey Types

Common surveys

Order a Survey →
K-1 Boundary Stakeout
Real Estate Purchase Item K-1
K-1 Boundary Stakeout
 K-2 Encroachment Survey
Real Estate Purchase Item K-2
K-2 Encroachment Survey
 Topographic Survey
For Engineering & Design
Topographic Survey
 Shoreline Survey
Coastal & Setback
Shoreline Certification
 Elevation Certificate
FEMA / Flood Insurance
Elevation Certificate
 Subdivision
Subdivision & Lot Lines
Subdivision / Lot Line Adjustment
Mauna Kea and Mauna Loa — Hawai'i landscape
About Us

Half a century of service in the islands

Wes Thomas Associates was founded in 1975 in Kailua-Kona, Hawaiʻi. From the outset the firm has dedicated itself to a single profession — land surveying — performing cadastral and related survey work across all the major Hawaiian Islands and the Pacific Basin.

Our 18-25 person team is led by Chrystal Thomas Yamasaki, LPLS, recipient of the Hawaii Land Surveyor’s Association Lifetime Achievement Award in 2016. The firm’s principals together bring over 100 years of combined surveying experience.

Meet Our Team →
How We Work

Our process

01
Inquiry & Scoping
We review the parcel, deed history, and your end-use needs to confirm the right survey type and timeline.
02
Field Survey
Our licensed crews complete the field measurements with calibrated total stations and GPS — on any major Hawaiian Island.
03
Drafting & Documentation
Findings are translated into maps, certificates, and reports compliant with Hawaiʻi regulations and Land Court practice.
04
Delivery & Filing
We deliver to you, your title company, lender, engineer, or the State as required — with filing support when applicable.
Affiliations & Recognition
Get in Touch

Let’s survey your land

Whether you’re buying, selling, building, subdividing, or just need certainty about a boundary — we’d love to help.

Office
75-5749 Kalawa Street, Suite 201
Kailua-Kona, Hawaiʻi 96740
Phone
(808) 329-2353
Fax (808) 329-5334
Email
surveys@wtahawaii.com
Hours
Mon — Fri, 8:00am — 4:30pm HST