Cost and lack of suitable data to develop disaggregate models are often-cited barriers to adopt activity-based models (ABM), particularly in regions that have the option of incrementally improving a trip-based model. In such cases, transferring an existing model is an attractive option because it can be accomplished at less cost and with fewer samples than required for original model estimation. This presentation demonstrates the suitability of transferring a fully-disaggregate ABM. The case study is the SE Florida ABM, which was developed by transferring the San Diego ABM to the region comprised by Miami-Dade, Broward and Palm Beach counties (home to approximate 5.5 million people). The presentation will discuss the model transfer approach, which comprised a first phase where the SANDAG model was transferred to SE Florida without any changes to the model specification, and a second phase where various sub-models were updated to better reflect SE Florida conditions. Particular attention will be given to how well the various sub-models performed before and after model calibration, by comparing model performance against targets developed from National Household Travel Survey, On-Board Survey and Census / American Community Survey data. Attention will be given as well to the approach adopted to calibrate the models, a non-trivial task given the potentially large number of parameters involved. This model development effort was started in August 2010 and is expected to conclude in December 2012. Analysis of the model results to date demonstrate a high degree of transferability of the entire model system, indicating that model transfer is a viable activity-based model development option even for a region as large as SE Florida.