Data sources and attribution
Every market we publish, who publishes it, and the exact licence it is used under.
How to read this page
DeedStone does not collect or own this data. Every market is published by a national authority and remains theirs. We download the official published files, clean and aggregate them, and publish derived statistics — medians, counts and price levels. We do not republish the raw registers as a dataset.
We are not affiliated with, and are not endorsed or certified by, any of the authorities below. We are an independent service that reuses public data under the terms shown.
Attribution is shown here and on each market. If you republish a figure from DeedStone, keep the original register's attribution with it — the exact wording each licence requires is below.
The ten markets
| Market | Source & publisher | What we use | Licence |
|---|---|---|---|
| Ireland | Property Price Register — Property Services Regulatory Authority (PSRA) propertypriceregister.ie |
Registered residential sale prices, per transaction, county + postcode, 2010 → | PSRA Re-use of Public Sector Information (PSI) terms — re-use free of charge in any format, attribution required. PSRA PSI terms |
| Japan | Real Estate Information Library — Ministry of Land, Infrastructure, Transport and
Tourism (MLIT) reinfolib.mlit.go.jp |
Registered transaction prices — condominiums and land, per transaction, 47 prefectures, 2005 → | Public Data License (PDL) v1.0 — CC BY 4.0 compatible; commercial use permitted. Attribution + "edited by" required. MLIT terms of use |
| Singapore | HDB resale flat prices via data.gov.sg data.gov.sg |
Resale registrations for public (HDB) flats, per transaction, town level, 1990 →. Private condos are not included. | Singapore Open Data Licence v1.0 — worldwide, perpetual, royalty-free; attribution required. Sub-licensing downstream is not granted. Licence text |
| Taiwan | Declared real-price registration data — Ministry of the Interior (MOI) plvr.land.moi.gov.tw |
Declared transaction prices, per transaction, district level, 2025 → | Open Government Data License v1.0 (政府資料開放授權條款第1版) — CC BY 4.0 compatible; prescribed attribution notice required. Licence text |
| Estonia | Transaction statistics — Maa- ja Ruumiamet (Estonian Land and Spatial Development
Board, formerly Maa-amet) maaruum.ee |
County-level aggregate statistics by property segment (apartments, buildable land, immovables, forest, arable), 2005 →. Aggregate-only: not individual sales. | Open Data Licence of the Land and Spatial Development Board — free use for any lawful purpose including commercial, source must always be cited. Licence text |
| United Kingdom | Price Paid Data — HM Land Registry price-paid-data.publicdata.landregistry.gov.uk |
Registered residential sales, per transaction, county level, 2023–2024. Completed sales only; the source carries no floor area. | Open Government Licence v3.0 — commercial reuse permitted, attribution required. Licence text |
| France | DVF (Demandes de valeurs foncières) — DGFiP / Etalab app.dvf.etalab.gouv.fr |
Registered sale prices and dates, per transaction, départements 13 and 69 only, 2022–2024. One sale can cover several parcels, so counts are sales, not dwellings. | Licence Ouverte 2.0 — reuse permitted including commercially, attribution required. Licence text |
| Netherlands | StatLine table 83625NED — Centraal Bureau voor de Statistiek (CBS) opendata.cbs.nl |
Municipality-level average sale prices, 1995–2025. Pre-computed aggregates — not individual transactions. | CC BY 4.0 — reuse with attribution and indication of changes. Licence text |
| Spain | Cadastral valuation statistics — Dirección General del Catastro catastro.hacienda.gob.es |
Cadastral reference valuations (valoración catastral) for Madrid-area municipalities, approval years 2005–2025. Valuations, not transactions. | Ley 37/2007 (re-use of public-sector information) — reuse permitted with attribution to the source. Ley 37/2007 text |
| United Arab Emirates | Dubai open data — Dubai Land Department (DLD) dubailand.gov.ae |
Registered sale transactions in Dubai, 2026 year to date. Mortgage and gift transfers excluded. | Official public portal. The portal publishes no explicit licence text, so we use it source-credited and remove the market on request. Open data portal |
Licence names and links verified against the publishers' own pages on 3 October 2026. Where a market's register publishes only aggregates or starts recently, we say so in the app and in every export. Coverage notes are listed on the Data and AI disclaimer page.
Attribution wording to reproduce
If you republish a figure we derived from one of these registers, the licence needs the original source credited. These are the forms the publishers ask for — copy the one that applies.
Contains information from the Residential Property Price Register, © Property Services Regulatory Authority (Ireland), reused under the PSRA Re-Use of Public Sector Information terms.
Contains information from Resale Flat Prices accessed on [date] from data.gov.sg (HDB), which is made available under the terms of the Singapore Open Data Licence version 1.0 — https://data.gov.sg/open-data-licence
出典：国土交通省 不動産情報ライブラリ (https://www.reinfolib.mlit.go.jp/)。 Where the figures are computed from it: 「不動産取引価格情報」（国土交通省）をもとに DeedStone Markets 作成。
提供機關／單位：內政部（地政司）— 不動產實價登錄批次資料（[year]）。 此開放資料依政府資料開放授權條款 (Open Government Data License) 進行公眾釋出 — https://data.gov.tw/license
Maa- ja ruumiamet, tehingute andmebaas (data as at [DD.MM.YYYY]). Licence: https://geoportaal.maaruum.ee/avaandmete-litsents
Contains HM Land Registry data © Crown copyright and database right (2023–2024), licensed under the Open Government Licence v3.0 — https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Source : DVF (Demandes de valeurs foncières), DGFiP et Etalab — Licence Ouverte 2.0 — https://www.numerique.gouv.fr/publications/licence-ouverte-open-licence/
Bron: CBS StatLine (83625NED), 1995–2025 — CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Bewerkt en geaggregeerd door DeedStone Markets.
Fuente: Dirección General del Catastro — datos reutilizados conforme a la Ley 37/2007 sobre reutilización de la información del sector público — valores catastrales, no transacciones (2005–2025).
Source: Dubai Land Department, Dubai open data (https://dubailand.gov.ae/en/open-data/) — used with source credit; the portal publishes no explicit licence text.
What the licences do not permit
- No resale of the raw registers. Our plans cover derived statistics, analysis and exports of those — not redistribution of the underlying datasets. The Singapore licence in particular grants no sub-licensing rights downstream.
- Not for advertising use (Ireland). The PSRA terms exclude use of the information for the principal purpose of advertising or promoting a particular product or service.
- No use of the source name as a product name (Japan). MLIT's terms do not allow "不動産情報ライブラリ" to be used in a product or feature name without approval. DeedStone uses it only as a credited source.
- Bulk volumes may be chargeable. Taiwan's free open-data release is the stream we use; other batch channels are a separate paid route with their own terms.
Currency rates
Reference exchange rates are provided by open.er-api.com (mid-market, indicative, refreshed daily). They are references only and not transaction rates. Every converted figure in the app and in exports carries an as-of stamp.
Software components
- Apache ECharts — charting (Apache License 2.0).
- FastAPI, Uvicorn, Jinja2, pandas, openpyxl — application runtime and exports (MIT / BSD / Apache licences as published by each project).
Corrections and takedowns
If you publish one of these registers and believe our use or attribution is wrong, contact hello@thermoneural.com and we will fix it or remove the market promptly.
This document is a first-draft template prepared for legal review; it is not legal advice and has not been reviewed by counsel.