Real Estate Portals Dataset API
Property listings, market data, and real estate analytics from major property portals worldwide.
Available Data
Here's what you can extract from Real Estate Portals using AlterLab:
Business Use Cases
How businesses use Real Estate Portals data to make better decisions:
- Property investment research
- Market trend analysis
- Rental yield calculations
- Location intelligence
How It Works
Identify your target real estate portals and markets
Provide search or listing URLs from real estate portals covering your target markets. AlterLab works with any public property portal — Zillow, Realtor.com, Redfin for the US, Rightmove or Zoopla for the UK, and international portals worldwide.
AlterLab retrieves listing data across portals
Real estate portals vary in technical complexity from moderate (Realtor.com) to advanced (Zillow). AlterLab handles each portal's specific rendering requirements, capturing listing prices, property details, automated valuations, and market trend data.
Get comprehensive property market data
Receive listing prices, property specifications, automated valuations, price history, days on market, neighborhood statistics, and agent information — from multiple portals, structured for investment analysis, market reports, or portfolio management systems.
Key Insight
Cross-referencing the same property across multiple portals (Zillow, Realtor.com, Redfin) often reveals discrepancies in automated valuations and listing status. Properties that are active on one portal but show as pending on another indicate data lag — a signal that the most recently updated portal is more current. For investment decisions, always verify across at least two portals.
Data Freshness
Active listing status changes frequently — properties move from active to pending within days in competitive markets. Daily monitoring of target markets catches status changes promptly. Price reductions typically happen in 7-14 day intervals after initial listing — weekly collection captures these reduction events.
Sample Output
Here's exactly what you receive when you collect Real Estate Portals data with AlterLab — clean, structured JSON ready for your application or spreadsheet.
{
"url": "https://www.realtor.com/realestateandhomes-detail/456-oak-ave_Denver_CO_80203_M12345-67890",
"listing_id": "M12345-67890",
"address": "456 Oak Ave, Denver, CO 80203",
"price": 625000,
"status": "Active",
"bedrooms": 4,
"bathrooms": 3,
"sqft": 2240,
"price_per_sqft": 279,
"lot_size_sqft": 7405,
"year_built": 1998,
"days_on_market": 5,
"open_house": "2026-06-28, 12:00 PM - 3:00 PM",
"listing_agent": "John Realtor, Keller Williams",
"description_snippet": "Stunning updated 4-bedroom home in sought-after Capitol Hill neighborhood...",
"neighborhood": "Capitol Hill",
"walk_score": 91,
"transit_score": 74,
"scraped_at": "2026-06-25T09:42:11Z"
}Quick Start
POST https://alterlab.io/api/v1/scrape
X-API-Key: YOUR_API_KEY
{
"url": "https://various/...",
"advanced": { "render_js": true }
}Need an API key? — no credit card required. 5,000 requests included.
Pricing at Scale
AlterLab uses pay-as-you-go pricing — no monthly minimums, no contracts. Balance never expires.
| Volume | Static pages | JS-rendered pages |
|---|---|---|
| 1,000 requests | $0.20 | $2.00 |
| 10,000 requests | $2.00 | $20.00 |
| 100,000 requests | $20.00 | $200.00 |
| 1,000,000 requests | $200.00 | $2,000.00 |
Static pages: $0.0002/request · JavaScript-rendered pages (like Real Estate Portals): $0.002/request · First 5,000 requests free. Full pricing details →
Frequently Asked Questions
Which real estate sites are supported?
AlterLab supports data extraction from any public real estate website including Zillow, Realtor.com, Redfin, Trulia, and international property portals.
Can I build a property database?
Yes. Collect listing data from multiple sources to build comprehensive property databases for investment analysis, market reports, or portfolio management.
How do investors use real estate data?
Investors track market prices, calculate rental yields, identify undervalued properties, and monitor specific neighborhoods for investment timing decisions.
Related Use Cases
Responsible Use
AlterLab is designed for extracting publicly available data. Always review the terms of service for any website you access, respect robots.txt directives, and ensure your use case complies with applicable laws in your jurisdiction.
Data Extraction Guides
Python Web Scraping API
Official Python SDK with async support and 5,000 free scrapes to start.
Anti-Bot Handling API
Automatic challenge handling for protected platforms — no extra configuration needed.
Best Web Scraping APIs in 2026
Compare the top scraping APIs by features, pricing, and reliability.
Pricing
From $0.0002/request. No subscriptions. Balance never expires.
Your first scrape.
Sixty seconds.
$1 free credit — up to 5,000 scrapes. No credit card.
Just a POST request.
No credit card required · $1 free credit, up to 5,000 scrapes · Balance never expires