The benchmarks come from three sources: publicly available consumer research (NAR, Google, BrightLocal, and similar organizations), published industry studies from SEO platforms and search analytics tools, and observations from campaigns we have managed for real estate clients. Before reusing a statistic elsewhere, check the original edition, sample, collection period, and metric definition with its publisher.
Three questions should come before interpretation: What exactly was measured? Who was included in the sample? What period did the result cover? A search-behavior survey, a local profile study, and a campaign observation answer different questions and should not be merged into one benchmark.
Two caveats are especially important. A top-10 metro can behave very differently from a smaller market, and a 10-year-old domain can respond differently from a new agent site even when the publishing plan looks similar. Attribution also changes the picture because the same buyer may discover an agent in search, revisit through a portal, and contact the agent directly.
Use each figure as a decision input rather than a target. The most defensible comparison is between a clearly defined benchmark and your own site data collected under the same metric definition.