About
We Value
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We strive to provide you with THOROUGH, OBJECTIVE, INDEPENDENT and UNBIASED opinion backed by our strong Guam real estate market knowledge, advanced education and commitment to professional ethics and standard. Our products and services will enable you to make sound decisions and maximize return on your real estate investment. We Value not only what we do but our commitment to you through our professionalism and timely service.
What you've said about us
- We have been very impressed with Cornerstone’s customer service and professionalism. Their timeliness and attention to detail is excellent; it was wonderful working with a solid group of professionals!
Meet the Team
Siska S. Hutapea
Founder and PresidentFounder and President of Cornerstone Valuation Guam, Inc., Siska S. Hutapea has engaged in real estate research, valuation and consulting since 1992 in Jakarta, Indonesia. She holds a Bachelor of Science in Structural Engineering from Trisakti University and Master Degree in Real Estate from University of New South Wales in Sydney. She grew up in the appraisal business and her father was the President of Indonesian Association of Appraisal Companies. She has made Guam home since May 1999 after successful honeymoon with her husband Edward in Guam in August 1998. They raise five children and enjoy Guam’s beautiful beaches.
Ms. Hutapea has over 20 years of experience in Guam real estate. In April 2012, Ms. Hutapea formed Cornerstone Valuation Guam, Inc., a real estate valuation and advisory services company. We Value is the company motto that not only reflects the service provided, but also the way of interactions to staff, clients, vendors, and the public. The company prides itself in providing strong knowledge and experience as well as an unbiased and objective approach to real property appraisal and analysis. The company is a trusted source of Guam real estate market statistics.
Ms. Hutapea is keeping up to date with world-class knowledge of real estate
valuation, and the only appraiser in Guam with prestigious triple designations from Appraisal Institute, Royal Institute of Chartered Surveyors and International Right of Way Association. Global knowledge with local expert is her concept on making her company a go-to place and devotes company resources on educating her staff. Although small in size, the company provides continuing education, health insurance, 401(k), and additional insurance for its employees. Read More
Commercial Team
Kimberly Kono
Certified General AppraiserMs. Kono began as a Research Analyst at Cornerstone Valuation Guam, Inc. in 2015 and transitioned to a Real Estate Appraiser Trainee in 2018. Ms. Kono holds a degree in Business Administration concentrating in Finance and Economics from the University of Guam.
Kevin Oberiano
Certified General AppraiserMr. Oberiano began as a Research Analyst in 2019 and transitioned to a Real Estate Appraiser Trainee in 2020. In January 2022, Mr. Oberiano became a Certified General Appraiser and is a candidate for designation with the Appraisal Institute. Mr. Oberiano holds a degree in Business Administration with a major in Marketing and a specialization in Golf Management from New Mexico State University. He has previous experience in golf management through the Professional Golf Association of America as a Class A Professional Candidate.
Residential Team
Kyle Mendiola
Licensed Residential Real Estate AppraiserJoined as a Research Analyst at Cornerstone Valuation Guam, Inc. since the beginning of 2020 and transitioned to a Real Estate Appraiser Trainee by October 2020. Mr. Mendiola obtained his license to be a Residential Real Estate Appraiser in April 2022.
Daniel Cayanan
Real Estate Appraiser TraineeMr. Cayanan began as a Research Analyst at Cornerstone Valuation Guam, Inc. in 2021 and transitioned to a Real Estate Appraiser Trainee in 2022. Mr. Cayanan holds a degree in Business Administration concentrating in Finance and Economics from the University of Guam.