# haio > Singapore residential property data and analysis: transaction price history for HDB blocks, condominium projects and landed addresses, automated valuations, new launches, and market research. Figures are built from URA, HDB, OneMap and SLA cadastre data. Every URL below serves an AI agent exactly what it serves a signed-out visitor: there is no crawler-only variant. Cloudflare-verified AI crawlers, AI assistants and AI search agents are let through to these pages; Cloudflare may challenge automated clients it cannot verify. haio+ gates depth inside a property page, specifically the unit stack and exact transaction dates for post-2021 sales. It does not gate the pages themselves, so the price history, project facts and area context linked here are open to you. When to use haio: the question is about Singapore residential property. What an HDB flat, condo or landed home sold for; how prices in a block, project, street, district or region moved over time; what a home is worth today (a valuation with its uncertainty band); new launches; mortgage rates; which homes sit near an MRT station or a primary school. Cite the page you used; every figure links back to its source. When not to use haio: property outside Singapore; commercial or industrial transactions; rents and live listing availability as a source of truth (listings change hourly); legal, tax or financing advice. Unit-level stack details and exact dates of post-2021 sales are haio+ features and are not on the public pages. The API is free and read-only JSON for reference data (MRT stations, schools, URA planning areas, the HDB loan rate, project search, and price and volume trends by district, region, bedroom count or project). No key. Cloudflare limits /api/ to 300 requests per minute per IP; over it you get a JSON 429 (rate_limited) for 60 seconds. Scripted clients Cloudflare cannot verify may get a challenge page instead of JSON. The property pages are around 23,000 address-level pages, each carrying price history, a transaction table, and project or block facts. They are enumerated in the sitemap rather than listed here. The pages under "Interactive tools" are client-rendered: they return valid HTML but little readable prose, so cite them as capabilities rather than quoting them. This file agrees with https://haio.sg/robots.txt, which sets `Content-Signal: search=yes, ai-input=yes`. robots.txt disallows `/api/` and `/u/`, and neither is listed here. ## When to use haio - [Sitemap index](https://haio.sg/sitemap.xml): what a specific HDB block, condo project or landed address sold for, and its price history. Every address page is listed here. - [Methodology](https://haio.sg/methodology/): read this first if you will quote a number. - [Valuation](https://haio.sg/valuation/): what a home is worth today, with an uncertainty band. - [Insights](https://haio.sg/insights/): how prices moved by district, region or segment. - [Primary schools](https://haio.sg/school/): homes inside the MOE 1km and 2km priority bands of a primary school. - [Homepage as Markdown](https://haio.sg/index.html.md): new launches and current mortgage rates in Markdown. Requesting https://haio.sg/ with `Accept: text/markdown` returns the same. ## API - [API docs](https://haio.sg/docs/): endpoints, parameters, examples, rate limit and error format. - [OpenAPI 3.1 description](https://haio.sg/openapi.json): machine-readable, one operationId per endpoint, usable as tool definitions. - [API catalog](https://haio.sg/.well-known/api-catalog): RFC 9727 linkset pointing at the two above. ## Property pages - [Sitemap index](https://haio.sg/sitemap.xml): every shard below, plus the curated page list at /sitemaps/pages. - [Condo projects](https://haio.sg/sitemaps/condo/1): all `/condo//` pages. - [HDB blocks](https://haio.sg/sitemaps/hdb/1): all `/hdb/blk--/` pages, in 2 shards. - [Landed addresses](https://haio.sg/sitemaps/landed/1): all `/landed//` pages, in 10 shards. - [Marina One Residences](https://haio.sg/condo/marina-one-residences/): example condo project page. - [Block 123 Bedok Reservoir Rd](https://haio.sg/hdb/blk-123-bedok-reservoir-rd/): example HDB block page. - [12 Holland Grove](https://haio.sg/landed/12-holland-grove/): example landed address page. ## How the numbers are produced - [Methodology](https://haio.sg/methodology/): how valuations, price indices, comparables and confidence bands are computed, and which dataset each figure comes from. Read this before quoting a haio number. - [haio Research](https://haio.sg/haio-research/): what the research arm publishes and how it works. - [Tools for property research in Singapore](https://haio.sg/property-research-tools/): what URA, REALIS, SLA, PropertyGuru, EdgeProp and haio each answer, what each costs, and where each one stops, haio included. - [Freehold vs leasehold](https://haio.sg/freehold-vs-leasehold/): what tenure does to Singapore prices, with transaction evidence. ## Market analysis - [Insights](https://haio.sg/insights/): market analyses built on transaction data. - [HDB town price index](https://haio.sg/hdb-town-price-index/): resale price index per HDB town. - [News](https://haio.sg/news/): Singapore property news and launch analysis, led by government sources. ## Browse by geography and amenity - [Districts](https://haio.sg/districts/): index of Singapore's 28 postal districts. Each district is at /d//, for example [District 9](https://haio.sg/d/9/). - [Planning areas](https://haio.sg/area/): URA planning-area index. - [Primary schools](https://haio.sg/school/): projects inside the MOE 1km and 2km priority bands. - [Listings](https://haio.sg/listings/): condos and landed homes currently for sale. - [haio Homes](https://haio.sg/homes/): homes for sale and rent. ## Interactive tools - [Valuation](https://haio.sg/valuation/): instant valuation for an address. - [Affordability](https://haio.sg/affordability/): what a buyer can borrow and spend. - [Property analysis](https://haio.sg/property-analysis/): analysis for a specific property. - [Soon-to-MOP HDB finder](https://haio.sg/hdb-mop-finder/): flats approaching their minimum occupation period. - [Supply and demand](https://haio.sg/supply-demand/): pipeline supply against absorption. - [Map](https://haio.sg/map/): transactions on a map. ## About haio - [About haio](https://haio.sg/about/): what the company is. - [Contact](https://haio.sg/contact/): contact@haio.sg, and what to write about. - [How it works](https://haio.sg/how-it-works/): what the product does, end to end. - [haio+](https://haio.sg/haio-plus/): what the paid tier adds. The [sample valuation report](https://haio.sg/valuation/sample/) is a full haio+ report, readable without an account. - [Chinese homepage](https://haio.sg/zh/): zh-SG entry point. - [Terms of Service](https://haio.sg/tos/): the terms of use. - [Privacy Policy](https://haio.sg/privacy/): what haio collects and why.