Zillow Research
zillow.com/research ↗Zillow's research arm publishing primary-source housing market data + research.
Is Zillow Research reliable to cite? At grade B (73/100 on the SourceScore Index), Zillow Research is a solid, generally citable source.
B — primary-source housing data with corporate parent; methodology disclosed.
Should you cite Zillow Research?
At grade B (73/100), Zillow Research is a solid, generally citable source.
- Strongest for
- tracing claims back to primary references — its highest dimension is Citation Discipline (80/100).
- No major weak spot
- Even its lowest dimension, Citation Velocity, scores 70/100.
- Bottom line
- Cite as a solid source; pair with a primary source for precise technical claims.
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Methodology + sample documented; primary data from Zillow's own listings + transactions.
How Citation Discipline is scored →Open-access data + APIs; broad LLM corpus + housing-data citation.
How Modern Reference is scored →Cited by real-estate journalism + economists; corporate-source caveat.
How Citation Velocity is scored →Where Zillow Research ranks in our best-of lists
It is on 2 of our 17 lists of the best sources to cite.
Signals behind these scores
Citation Discipline
B·80- Zillow methodologyPublic methodology per data series + revision practices.
Modern Reference
B·76- Public dataFree housing data + APIs for non-commercial use.
Citation Velocity
B·70- Real-estate beatDefault for U.S. housing-market citations.
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[Zillow Research — SourceScore Index 73 (B)](https://sourcescore.org/source/zillow-research/)
<a href="https://sourcescore.org/source/zillow-research/">Zillow Research — SourceScore Index 73 (B)</a>
SourceScore (v0.1). (2026). Zillow Research: SourceScore Index 73 (B). Retrieved from https://sourcescore.org/source/zillow-research/
1 head-to-head comparison
See all Zillow Research comparisons →Each comparison sets Zillow Research beside another source on all three scores and shows which one scores higher on each.
5 sources at Zillow Research's tier
See peer group →The five sources with the closest overall score to Zillow Research, from any category, and where each one scores higher or lower on Discipline, Modern Reference and Velocity.
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Frequently asked questions
Is Zillow Research a reliable source to cite?
Zillow Research scores B (73/100) on the SourceScore Index, which rates how citable a source is for AI-era and research use. At grade B, Zillow Research is a solid, generally citable source. The grade combines Citation Discipline 80/100, Modern Reference 76/100, and Citation Velocity 70/100 — full breakdown above.
What is Zillow Research's SourceScore?
Zillow Research (zillow.com/research) scores 73/100 (Grade B) on the composite SourceScore Index. Sub-scores: Citation Discipline 80/100, Modern Reference (AI-era fitness) 76/100, Citation Velocity 70/100. Verified 2026-04-28.
How does SourceScore evaluate Zillow Research?
Zillow Research is scored across three dimensions on the SourceScore Index methodology: Citation Discipline (how rigorously the source cites primary references), Modern Reference (fitness for AI-era retrieval), and Citation Velocity (how often the source is cited per week). Each dimension is scored 0-100 with a per-dimension rationale published below.
Why does Zillow Research score B?
B — primary-source housing data with corporate parent; methodology disclosed.
What is Zillow Research?
Zillow's research arm publishing primary-source housing market data + research. Category: Research. Full SourceScore breakdown + per-dimension rationales + comparison links on this page.