SG Property Index is an independent property data platform. We do not sell property, represent agents, or accept sponsored listings. Our job is to make property pricing transparent and hold agents accountable through verified data.
Singapore's HDB resale market moves about $15 billion a year. Buyers and sellers routinely make the largest financial decision of their lives based on incomplete information. HDB publishes transacted prices, but the data arrives two to three months after the deal is done.
Property agents fill that information gap. They advise on pricing, negotiate deals, and guide transactions. Some are excellent at it. Others are not. The problem is that there has never been a way to tell the difference, at least not based on data.
CEA regulates agent conduct and tracks complaints. PropertyGuru and 99.co rank agents by listing volume and reviews. But nobody tracks the one thing that actually matters in a price negotiation: whether the agent's pricing advice turns out to be accurate.
SG Property Index exists to answer that question. Agents submit their transaction prices. HDB publishes the official figures. We compare the two and publish the results. Accurate agents build a verified track record. Inaccurate agents are exposed by their own submissions.
All official transaction data on this platform comes from data.gov.sg, the Singapore government's open data portal. Specifically, we use the HDB Resale Flat Prices dataset published by the Housing and Development Board.
This dataset covers every HDB resale transaction in Singapore from January 2017 to the present, updated monthly. It includes the town, street, block, flat type, storey range, floor area, flat model, lease details, and transacted price.
We do not modify, adjust, or estimate any official figures. The prices you see under "Official HDB Data" are exactly as published by HDB. Agent-reported prices are clearly labelled as such and are always shown separately from verified data.
Data is licensed under the Singapore Open Data Licence.
When HDB publishes new transaction data, our system compares each agent submission against the official records. A match requires the town, flat type, block, storey range, floor area, and transaction month to align. If exactly one submission matches one official record, it is automatically verified. If multiple submissions could match the same record, the system flags it for manual review.
For each verified match, accuracy is calculated as:
For example, if an agent submitted $520,000 and the official price was $530,000, the accuracy is 100 - (10,000 / 530,000 x 100) = 98.1%.
An agent's trust score is a weighted average of all their verified match accuracies. Recent matches (last 6 months) are weighted 1.5x. Matches between 6 and 12 months old are weighted 1.0x. Matches older than 12 months are weighted 0.5x. This ensures the score reflects current performance, not just historical accuracy.
The system can only verify transactions where the agent's submission can be uniquely matched to an official HDB record. If the submission details are too generic (for example, a common flat type in a large block with many transactions in the same month), matching may fail. In those cases, the submission is marked "Unverified" and does not affect the agent's score.
SG Property Index is built and operated by Brewtonic Inc Pte Ltd, a Singapore-registered digital agency. We are not affiliated with HDB, CEA, PropertyGuru, 99.co, SRX, or any property agency.
We do not accept payment from agents in exchange for higher scores or better placement. Trust scores are calculated mathematically from verified data. There is no editorial discretion in the scoring process.
Agent profiles and submissions are free. Premium features (when launched) will offer additional tools and visibility, but will never influence trust scores or rankings.
SG Property Index is a product of Brewtonic Inc Pte Ltd.
For press, partnerships, or general questions: hello@brewtonic.com
For agent registration or technical issues: support@sgpropertyindex.com