Can AlterLab extract property listings from real estate sites?

Yes. AlterLab handles both static and JavaScript-rendered real estate portals. Property listings, pricing, location data, and availability are extracted as structured JSON. Sites that render listings client-side are handled automatically without any configuration — AlterLab escalates to the appropriate rendering tier based on the page type.

How do I monitor short-term rental prices across markets?

Use the AlterLab batch endpoint to submit hundreds of listing URLs in a single request. Schedule batch jobs at your preferred interval to capture nightly rate changes, availability windows, and occupancy patterns. JSON output makes it straightforward to load directly into a database or analytics pipeline.

What output formats are available for real estate data?

Request JSON for structured property metadata, HTML for raw page content with your own parser, or markdown for LLM-ready text. JSON output includes data extracted from JSON-LD schema.org/RealEstateListing markup when present on the page. For sites without structured markup, use HTML and apply CSS selectors to extract specific fields.

Can I extract data from property portals that require a login?

AlterLab can extract from publicly accessible listing pages without authentication. For pages that require a user session, you can pass session cookies in your request headers. AlterLab handles the rendering and data extraction — session management is controlled by your application.

How do I track price changes for a property over time?

Schedule recurring AlterLab batch jobs against your watchlist of property URLs. Store the extracted price and availability data with a timestamp in your database. Compare the latest extraction to the previous snapshot to detect price changes, availability shifts, or listing updates.

What does large-scale property data collection cost?

At $0.0002/request for static listing pages, collecting data for 50,000 properties daily costs $10/day. For JavaScript-rendered portals at $0.004/request, the same volume costs $200/day. Most real estate pipelines mix tiers — static pages for market-wide sweeps, browser rendering only for detail pages that require it — keeping costs well below linear estimates.

property listing extractionrental price trackingreal estate market data

Real Estate Scraping API

Extract property listings, rental prices, and market data from any real estate portal. AlterLab handles JavaScript-rendered listing pages automatically and returns structured JSON output ready for your investment analysis pipeline. From $0.0002/request.

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Extract Property Data in One API Call

Send a listing URL, get structured property data. AlterLab handles JavaScript rendering automatically.

real_estate.py

import requests, json

# Extract property listing data
response = requests.post(
    "https://api.alterlab.io/v1/scrape",
    headers={"X-API-Key": "sk_live_your_key"},
    json={
        "url": "https://zillow.com/homedetails/...",
        "formats": ["json"],
    }
)

data = response.json()
listing = data["data"]["metadata"]
price = listing.get("price")

batch_listings.py

# Monitor 500 properties at once
listing_urls = [
    "https://zillow.com/homedetails/1",
    "https://airbnb.com/rooms/12345",
    "# ... up to 1000 URLs"
]

response = requests.post(
    "https://api.alterlab.io/v1/batch",
    headers={"X-API-Key": api_key},
    json={
        "urls": listing_urls,
        "formats": ["json"],
    }
)

How Real Estate Data Collection Works with AlterLab

A complete property data pipeline in four steps.

Submit Property Listing URLs

Send your target property URLs to AlterLab's scrape or batch endpoint. Include rental listings, for-sale properties, and short-term rental pages. No per-site configuration required — AlterLab automatically applies the right data extraction strategy for each portal.

Automatic Page Rendering

Modern real estate portals render listing details client-side using JavaScript. AlterLab detects the page type and escalates to headless browser rendering when needed, extracting price, square footage, bedroom count, availability, and location data — without any configuration on your side.

Extract Structured Property Data

Request JSON output to receive structured data from schema.org RealEstateListing markup when available. For sites without structured markup, use HTML output and apply CSS selectors to extract specific fields. Markdown output is available for LLM-powered market analysis.

Store, Compare, and Alert

Store extracted property data with timestamps in your database. Run scheduled batch jobs daily or hourly depending on market volatility. Compare against historical snapshots to detect new listings, price reductions, availability changes, and properties coming off the market.

Real Estate Data Use Cases

What teams build with AlterLab's property data API.

Investment Property Analysis

Aggregate listing data across markets to identify undervalued properties, track price trends, and surface investment opportunities — all from one data pipeline.

Short-Term Rental Intelligence

Monitor nightly rates, occupancy calendars, and host pricing strategies across rental platforms to optimize your own listings or benchmark competitor performance.

Market Trend Monitoring

Track median prices, days-on-market, and inventory levels across zip codes and neighborhoods. Build historical databases for market research and forecasting.

Property Alert Systems

Notify buyers when properties matching their criteria appear, price reductions happen, or listings return to market. Data delivered at the interval your application requires.

Competitive Rental Pricing

Compare long-term rental rates across similar properties in the same area. Identify pricing gaps and adjust rents to minimize vacancy while maximizing yield.

Real Estate SaaS Platforms

Power tenant-facing property search tools, landlord portfolio dashboards, and property management analytics with reliable, structured listing data at scale.