Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Costs are notoriously difficult to obtain...
Around the end of the year, NREL will be releasing a new version of the National Residential Efficiency Measures Database, which is the source of the BEopt cost data. It will be a complete update of the cost data for all residential building components and will include a simplified format. Unfortunately that won't help you today. And because the format is changing so much, it won't immediately find its way into a BEopt release.
There is a somewhat recent LBNL report that includes some cost data for California, maybe that will help.
