Average property value estimates from Zillow, Redfin, and Realtor.com

Description

Who is this for?
Real estate investors, agents, and analysts who want a more reliable property valuation than any single AVM provides. Useful for offer prep, portfolio tracking, comp analysis, and CRM enrichment.

What does it do?
Sends a property address to three independent valuation APIs in parallel — Zillow's Zestimate, Redfin's Estimate, and Realtor.com's estimate — then averages the three values to produce a smoothed, defensible mid-point figure. Each AVM uses different proprietary models that routinely disagree by 10–30%, so averaging cancels out individual model bias.

How it works
Manual Trigger + Edit Fields — set the property address (preset to a sample Atlanta address for testing)
Three parallel API chains all fire simultaneously:
Zillow — direct call returns the Zestimate
Redfin — search by address → fetch property estimate by ID
Realtor.com — autocomplete by address → fetch property detail by ID
Merge combines the three responses by position
Edit Fields1 extracts each estimate value into a clean numeric field
Code node calculates the arithmetic mean and writes it to averageEstimate

Output schema: { address, zestimate, redfinEstimate, realtorEstimate, averageEstimate }

Set up steps
Sign up at RapidAPI and subscribe to three APIs (all have free tiers): zillow-com1, redfin-com-data, and realtor-search
Create a single Header Auth credential in n8n with your RapidAPI key (header name: x-rapidapi-key)
Attach that same credential to all 5 HTTP Request nodes
Replace the sample address in Edit Fields with your real property
(Optional) Swap the manual trigger for a webhook, schedule, or Google Sheets trigger; add an output node after the Average to send results to Sheets, a database, Slack, or your CRM

Setup time: ~5–10 minutes once the RapidAPI subscriptions are active.