Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The Commercial Building Energy Consumption Survey that Neal suggested actually includes questions that provide a lot more detail. To get the raw data see:
http://www.eia.gov/consumption/commercial/data/2012/index.cfm?view=microdata
Unfortunately, it is a lot of work to process the data yourself.
Another source of related information is the DOE Buildings Energy Data Book:
http://buildingsdatabook.eren.doe.gov/default.aspx
It does not have exactly what you are looking for but related information that might be useful.
If you are willing to not use a national survey, the Commercial Building Stock Assessment performed by the NEEA covering Idaho, Oregon, Montana, and Washington State shows some details:
http://neea.org/resource-center/regional-data-resources/commercial-building-stock-assessment
Appendix A Figure A.5.4.
Appendix A Figure A.5.10
