RECOMMENDED RESIDENTIAL CONSTRUCTION FOR COASTAL AREAS Building on Strong and Safe Foundations FEMA P-550, Second Edition / December 2009 Appendix E. Cost Estimating The cost data provided in Appendix E were developed in 2006 for the First Edition of FEMA 550 for select communities along the Gulf of Mexico. The applicability or accuracy of the data to other coastal areas has not been investigated. Although relative costs between foundation systems may apply in other coastal regions, users of the manual should verify current actual costs for any given location.