實價雷達 HouseTW

A free Taiwanese real estate platform overlaying 3.49 million official transaction records with soil liquefaction, fault lines, and flood risk maps.

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What Is HouseTW?

HouseTW (housetw.com) is a Taiwanese real estate data platform that overlays 3.49 million historical transaction records from the Ministry of the Interior with government disaster mapping data—including soil liquefaction, active fault lines, and flood susceptibility—onto a single interactive map. It goes beyond answering "How much did properties here sell for recently?" to address critical safety questions: "Will the ground at this address liquefy? How close is it to a fault line? Does it flood during heavy downpours?"

Two built-in AI features streamline your search:

AI Property Finder: Use natural language to describe your criteria (e.g., "New Taipei City, under 15 million TWD, built within the last 20 years, within a 10-minute walk of an MRT station"), and the model parses your request to query the database.
AI Property Health Check: For a specific address, this feature aggregates transaction prices, building age, floor level, surrounding amenities, and risk layers into a straightforward, plain-language assessment.

Data Coverage

3.49 million transaction records: Covering all 22 counties and cities, and 364 townships/districts in Taiwan, dating back to the implementation of the real estate實价登錄 (real-price registration) system in 2012.
1.19 million addresses: Each address features an independent page displaying floor-by-floor and unit-by-unit transaction history within the same building.
770,000 rental records: Sales and rental data are presented side-by-side to allow for straightforward rental yield calculations.
Risk mapping per address: Includes 730,000 addresses mapped for soil liquefaction, 130,000 for flood susceptibility, and 40,000 for active fault lines—mapped at the specific address level rather than broadly by administrative district.
91,513 amenity points: Including MRT stations, bus stops, YouBike stations, parking lots, EV charging stations, and schools.
8,921 undesirable facility points: Including gas stations, electrical substations, funeral facilities, markets, and illegal factories.
2,206 foreclosure cases: Cross-referenced with historical real estate transaction data.
2.57 million official land value records: Comprehensive coverage across all 22 counties and cities (including Penghu, Kinmen, and Lienchiang).

Data is automatically updated every night.

How It Differs from Standard Real Estate Sites

Most property websites limit risk information to the administrative district level (e.g., "This district has potential liquefaction concerns"). HouseTW performs point-by-point comparisons of government map data with 1.19 million individual address coordinates to pinpoint risks down to the exact doorplate. When buying a home, getting risk data limited to the district level provides virtually no practical value.

Another rare feature is its inclusion of leading indicators. While transaction prices reflect past events, the platform tracks four forward-looking dimensions—building permits and construction starts (supply), household numbers and migration trends (demand), new bank mortgage lending (liquidity), and policy timelines—overlaid directly onto real estate price trends.

Data presentation is deliberately conservative: ranking lists enforce a minimum transaction volume threshold, automatically labeling low-sample areas as "insufficient data in this district" rather than forcing arbitrary rankings; missing data returns surrounding transactions rather than defaulting to zero; and related-party transactions, special deals, and outliers are explicitly filtered out and labeled.

Free Tools

Mortgage calculator, rental yield calculator, homeownership affordability calculator, house and land transactions tax calculator, total home-buying cost calculator, trade-up calculator, public facility ratio floor-space conversion, asking-price reasonableness checker, urban renewal hotspots, MRT station proximity pricing, market popularity rankings, foreclosure section, and batch query tool. A dedicated LINE official account is also available, allowing users to send their location or address to instantly receive nearby transaction data.

The entire platform is free, requires no login, has no brokerage affiliations, and features no paywalls or gated "enter your phone number to view the full report" requirements.

Key Features

Transaction map covering a 0.1 to 10-kilometer radius, filterable by property type, total price, building age, and time
Floor-by-floor and unit-by-unit transaction history within the same building to evaluate price differentials and owner equity
Address-specific indicators for soil liquefaction, active fault lines, and flood susceptibility
AI Property Finder: Use natural language descriptions to search criteria directly
AI Property Health Check: Generate plain-language assessments for single addresses
Leading indicators: Overlay construction permits, mortgages, household data, and price trends on a single chart
Rental market pricing and yield calculation based on 770,000 rental records
Foreclosure listings section with cross-referencing against real-price registration data
LINE official account integration for instant address or location-based queries

Pros

Completely free, no login or app download required
Risk mapping operates at the individual address level rather than broad districts
Independent of real estate brokerages with no paywalls or forced data-sharing
Honest labeling of low-sample data without forced rankings
Automatically updated daily using purely public government data sources

Cons

Covers Taiwan only; no international properties available
Real estate registration has a statutory reporting period, meaning the latest transactions take 1 to 2 months to appear (the platform clearly displays data cut-off dates)
Not a brokerage platform; does not feature property photos or agent-led tours, focusing instead on official transaction records

Use Cases

Checking floor-by-floor price differentials in the same building before buying to determine if an asking price is reasonable
Verifying the soil liquefaction, fault line, and flood susceptibility risks of a target property address
Allowing homeowners to estimate the current market value of their property
Helping landlords set competitive rental prices by comparing neighboring market rates
Enabling investors to calculate actual rental yields using purchase prices and rental data
Establishing fair market values via transaction data before engaging local professionals for buying, selling, or renting
Assisting researchers and media outlets in citing regional housing prices and leading economic indicators

Editor's Note

Editor's Note: If you are actively house hunting, this is one of the few free tools that maps geological and flood risks down to individual doorplates—making it well worth checking before you make an offer. The AI features are primarily supplementary; the true value lies in the deeply organized public database underneath the conversational interface. To get started quickly on mobile, tap "View surroundings using my location" for a much more intuitive start than using the search bar.

FAQ

Is HouseTW free to use?

Completely free, with no registration or login required. The platform features no paywalls and does not require you to submit your phone number to view complete content.

Where does the data come from?

Transaction and rental data originate from the Ministry of the Interior's real-price registration system, disaster maps from the Taiwan Geological Survey and Water Resources Agency, foreclosure data from the Judicial Yuan, and leading indicators from public government datasets including the Construction and Planning Agency, Department of Household Registration, and the Central Bank.

How often is the data updated?

It updates automatically every night. However, due to statutory reporting lags inherent to the official real estate registration system, the newest transactions take some time to appear on the platform.

How do I use the AI Property Finder?

Visit the /ask page and describe your requirements in a single sentence (e.g., "New Taipei City, under 15 million TWD, built within 20 years, 10 minutes walking distance from an MRT station"). The system will parse your criteria and query the database for matching regions and transactions.

Can liquefaction or fault line indicators be used as the sole basis for buying a home?

These are public government "susceptibility" datasets indicating relative risk levels rather than definitive conclusions. While they are valuable evaluation metrics, they should not be used in isolation to make purchase decisions. Actual conditions should always be verified through on-site professional engineering assessments.

Does HouseTW recommend specific properties or help sell homes?

The platform does not provide specific property recommendations or investment advice. If you wish to buy, sell, or rent, you can submit your requirements via the "Market Consultation" page to receive a fair market value estimate based on real-price data, followed by a non-binding match with a local professional.

Which counties and cities are covered by the official land value data?

All 22 counties and cities across Taiwan are fully covered, totaling 2.57 million records, including offshore islands such as Penghu, Kinmen, and Lienchiang. Data is sourced from the Ministry of the Interior's Landization and Land Value services and displayed under the "Property Info" tab on individual address pages.