Linn A. Duesterbeck, MAI

President and principal of the company, Linn holds the MAI and SRA designations from the Appraisal Institute. He was awarded the SRA (Senior Residential Appraiser) designation in 1975 at age 24, then the youngest designated member of the Society of Real Estate Appraisers. A lifelong resident of the Janesville area, Linn graduated from Janesville Craig High School in 1969, and from Milton College in 1973 with academic honors in both Business and Real Estate. In his long appraisal career, Linn has been engaged in nearly every conceivable type of real property appraisal, including hundreds of atypical properties throughout Wisconsin. Linn has also been involved in various committees that were instrumental in providing the basic structuring for licensing and certification of real estate appraisers in Wisconsin in the 1980’s. Linn started his appraisal business as Modern Appraisal Services in 1973, a full service, residential and commercial appraisal company. He then sold the residential division and formed L.A. Duesterbeck & Associates, Inc., a predominately non-residential appraisal company, in 2000. Linn has experience in many facets of the real estate industry, including development, sales, leasing and of course appraisal.

Professional Designations/Affiliations

  • Appointee, State of Wisconsin Real Estate Appraisers Board 1990-98
    • Chairperson 1994-95
    • Received Certificate of Commendation from Governor Thompson for effort and commitment of excellence
  • Wisconsin Certified General Appraiser #4
  • Delegate, Wisconsin Appraisers Coalition (1989-90)
  • MAI, Certificate Number 9920, Appraisal Institute
  • SRA, Senior Residential Appraiser since 1975, Appraisal Institute
  • Member of the Appraisal Institute since 1973, received 40 year “milestone” certificate in 2013
  • Past Director, Appraisal Institute, Wisconsin Chapter
  • Director-President from 1980-84, Madison Chapter 72, Society of Real Estate Appraisers
    • also served as chairman of candidate guidance, ethics and professional standards committees
  • Licensed Real Estate Broker
  • Graduate of Milton College, BBA (Business) Minor Real Estate


  • Full-time real estate appraiser since 1973
  • Former carpenter, builder and developer
  • Sold and purchased real estate of various types since 1973
  • Developer of the following:
    • Canyon Colonial Apartments, a 24-unit apartment complex in Janesville, Wisconsin
    • Stonefield Office Center, a 21,500 square foot multi-tenant office complex in Janesville, Wisconsin
    • Stonefield Glen Condominiums in Janesville, Wisconsin
    • Woodgate Office Center, a 7,000 square foot multi-tenant office complex in Janesville, Wisconsin
    • Sunset Acres, a residential subdivision on Lake Koshkonong, Wisconsin
  • Guest instructor at various local colleges and technical schools on real estate appraisal
  • Has been involved in nearly every conceivable type of real property valuation, including thousands of single-family residences, multi-family units, commercial, industrial, agricultural and special use properties
  • Major recent assignments have included large industrial plants, self storage facilities, gas stations and convenience stores, office buildings, golf courses, motels, shopping centers, schools and medical facilities
  • Expert witness in court, on many occasions, throughout Wisconsin since 1973
  • Experienced condemnation appraiser involving a number of whole and partial takings
  • Has mentored and trained over 30 appraisers, most which have gone on to successful careers in the appraisal profession and have obtained, or are seeking professional designations from the Appraisal Institute.