Business Details
50+ Years
experience
Professional Real Estate Appraisals in Miami
Founded in 1959 by Theodore W. Slack, Slack, Johnston & Magenheimer has established itself as a trusted leader in real estate appraisal and consulting services. Headquartered in Miami, Florida, our firm serves clients across South Florida and beyond, specializing in residential, commercial, industrial, and aviation property valuations. With over 50 years of combined experience, our team of licensed professionals adheres to the highest ethical standards, delivering objective and comprehensive evaluations tailored to client needs. We maintain rigorous compliance with the Appraisal Institute's Code of Professional Ethics and the Uniform Standards of Professional Appraisal Practice. Our expertise extends to complex assignments including eminent domain, litigation support, and market feasibility studies.Led by Andrew H. Magenheimer, MAI, a South Florida native with over 30 years of experience, we combine local market knowledge with global best practices. Our commitment to excellence is demonstrated through personalized service, technical precision, and a proven track record of solving complex valuation challenges. We maintain additional quality standards beyond industry requirements, ensuring every report reflects our principals' direct involvement and expertise. Our aviation appraisal specialists have served Florida airports for over 25 years, conducting annual general aviation surveys since 1993. From single-property assessments to large-scale portfolio valuations, we provide actionable insights that empower informed real estate decisions.
Services
Commercial Appraisals
Residential Appraisals
Aviation Appraisals
Eminent Domain Consulting
Market Trend Studies
Tax Assessment Appeals
Investment Counseling
Feasibility Analysis
Litigation Support
Airport Valuations
Details
- Year established: 1959
Highlights and features
- Over 50 years serving South Florida real estate markets
- MAI-certified professionals with specialized aviation appraisal expertise
- Direct involvement of senior appraisers in every assignment
- Comprehensive services for all property types including special purpose assets
- Proven track record in complex litigation and eminent domain cases
Associations and certifications
- Appraisal Institute
- Uniform Standards of Professional Appraisal Practice
Services
Commercial Appraisals
Our commercial property valuation service provides detailed market analyses for office buildings, retail centers, industrial facilities, and mixed-use developments. We employ income capitalization, sales comparison, and cost approaches to deliver accurate valuations for financing, investment, and legal purposes. Our team specializes in complex commercial assignments across South Florida's diverse real estate market.
Aviation Appraisals
Specialized valuation services for aviation assets including airport terminals, hangars, and aeronautical facilities. With over 25 years of experience, we conduct FAA-compliant appraisals for both on-airport and off-airport properties, supporting lease negotiations, development decisions, and regulatory compliance across Florida's major aviation hubs.
Eminent Domain Consulting
Expert valuation and consulting services for condemnation cases and public infrastructure projects. Our team provides detailed market analyses and courtroom testimony for right-of-way expansions, roadway improvements, and other government-led land acquisitions, ensuring fair compensation for property owners.
Residential Appraisals
Comprehensive residential property valuations for single-family homes, condominiums, and multi-family units. We follow strict USPAP guidelines to deliver accurate assessments for mortgage lending, estate settlements, and property tax appeals across Miami-Dade and surrounding counties.
Market Trend Studies
In-depth market research and trend analysis services supporting investment decisions and development planning. Our proprietary General Aviation Airport Survey, conducted annually since 1993, provides critical rental rate and operational data for Florida's aviation sector.
People
Andrew H. Magenheimer
President
MAI-certified appraiser with over 30 years of South Florida commercial real estate experience, specializing in aviation properties and complex litigation support. Active member of the Appraisal Institute and Florida Airports Council.
Questions
What types of properties do you appraise?
We evaluate residential, commercial, industrial, aviation, and special purpose properties including environmentally sensitive lands and eminent domain projects across Florida.
Are your appraisers certified?
All appraisals are conducted by Florida State Certified General or Residential Appraisers, with senior supervision by Andrew H. Magenheimer, MAI.
Do you provide services outside South Florida?
While based in Miami, we regularly handle assignments throughout Florida and have experience with international valuation requirements.
Can you assist with legal matters?
Yes, we provide litigation support including expert witness testimony for eminent domain, foreclosure, and property damage cases in state and federal courts.
What aviation appraisal experience do you have?
We've specialized in aviation valuations since 1993, conducting annual airport surveys and serving major Florida airports including Miami International and Fort Lauderdale-Hollywood.
