- First American Title - Residential Reports / Residential permit data and [incomplete] project pipeline for Northern California.
- Institute of Real Estate Management (IREM) / The name says it all. Operating cost data available for purchase.
- Building Owners and Managers Association (BOMA) / Operating cost data available for purchase.
- National Association of Real Estate Investment Trusts / Return rates and other data for public REITs. Lots of free material including historical return rate data.
- Bank Rate Monitor / Current rates for loans and other financial instruments. Mostly free.
- RealtyRates.com / Return requirements and yield rates for various types of real estate. National data is provided free, but regional data requires subscription.
- Marshall & Swift / Construction cost data updated monthly. Most useful information on the site requires a subscription.
- National Association of Homebuilders / Aggregates and publishes housing starts by metro area. Lots of good, free material.