Data Sources
数据来源
All primary datasets used across IrelandPropertyData
IrelandPropertyData 所使用的全部原始数据集
| Source来源 | Dataset数据集 | Coverage覆盖范围 | Update Frequency更新频率 | Last Updated最近更新 | Link链接 |
|---|---|---|---|---|---|
| Revenue.ie | Property Price Register (PPR)房产价格登记册（PPR） | 699,653 residential transactions, 2010–present, all 26 counties699,653 宗住宅交易，2010年至今，全部26个郡 | Monthly每月 | 2026-03 | propertypriceregister.ie |
| Daft.ie | Daft Rental Price ReportDaft 租金价格报告 | Average asking rent by county and Dublin postcode (D1–D24), 2018–present按郡及都柏林邮政编码（D1–D24）划分的平均要价租金，2018年至今 | Quarterly每季度 | 2025Q4 | daft.ie/report |
| RTB | Residential Tenancies Board Rent Index住宅租约委员会租金指数 | Registered tenancy rents by county, bedroom count, 2007–present按郡及卧室数量划分的已登记租约租金，2007年至今 | Quarterly每季度 | 2025Q3 | rtb.ie/research/rent-index |
| CSO PxStat | Planning Permissions Granted (BHA14)已批准规划许可（BHA14） | New dwelling planning grants by county, 2013–present按郡划分的新住宅规划批准数量，2013年至今 | Quarterly每季度 | 2026Q1 | data.cso.ie |
| CSO PxStat | New Dwelling Completions (NDQ05)新住宅竣工量（NDQ05） | Completed new dwellings by local authority, 2011–present按地方当局划分的新住宅竣工数量，2011年至今 | Quarterly每季度 | 2025Q4 | data.cso.ie |
| CSO PxStat | Recorded Crime Statistics犯罪统计数据 | Crime incidents by county, 2003–present按郡划分的犯罪事件，2003年至今 | Annual每年 | 2024 | data.cso.ie |
| CSO | Population Census人口普查 | County population and household size, 2022郡人口及家庭规模，2022年 | 5-yearly每5年 | 2022 | cso.ie |
| SEAI | Building Energy Rating (BER)建筑能源评级（BER） | 1.1M+ rated properties with EPC bands and heat pump data逾110万个已评级房产，包含能效等级及热泵数据 | Continuous持续更新 | 2025Q1 | ndber.seai.ie |
| ECB / Central Bank | Mortgage Interest Rates抵押贷款利率 | ECB main refinancing rate + Irish retail mortgage rates欧央行主要再融资利率 + 爱尔兰零售抵押贷款利率 | Monthly每月 | Monthly每月 | sdmx.ecb.europa.eu |
| IDA Ireland / FDI Markets | FDI Investment by County各郡外商直接投资 | Foreign direct investment by county, normalized 0–100 score按郡划分的外商直接投资，标准化0–100评分 | Annual每年 | 2025 | idaireland.com |
All datasets are fetched automatically every Sunday at 03:00 UTC. PPR data is imported monthly. If you notice a discrepancy, contact us at [email protected].
所有数据集每周日凌晨3时（UTC）自动更新。PPR数据每月导入。如发现数据差异，请发送邮件至 [email protected]。
Investment Opportunity Score
投资机会评分
How county scores are computed for the Invest page
投资评分页面的郡级评分计算方式
Each county receives a score from 0–100 calculated as a weighted sum of 6 normalized components. The score is designed to rank counties by relative investment attractiveness — it does not predict future returns.
每个郡获得一个0–100的评分，由6个标准化指标的加权求和计算得出。该评分旨在按相对投资吸引力对各郡进行排名，并不预测未来回报。
| Component指标 | Weight权重 | Metric计算方法 | Source数据来源 |
|---|---|---|---|
| Rental Yield租金收益率 | 35% | Gross yield = (annual RTB rent × 12) / Daft median asking price毛收益率 = (RTB年租金 × 12) / Daft要价中位数 | RTB + Daft |
| 5-Year Price Growth5年价格增长 | 25% | % change in PPR median price, 2020→2025PPR中位价格变动百分比，2020→2025 | PPR |
| Market Liquidity市场流动性 | 10% | Annual PPR transaction count relative to housing stock年度PPR交易量相对于住房存量的比例 | PPR + CSO |
| FDI Attractiveness外商投资吸引力 | 10% | IDA Ireland investment score (normalized)IDA爱尔兰投资评分（标准化） | IDA |
| Population Growth人口增长 | 10% | % change in county population, 2016→2022郡人口变动百分比，2016→2022 | CSO Census |
| Vacancy Rate (inverse)空置率（逆向） | 10% | Lower vacancy = higher score; from CSO Housing data空置率越低 = 评分越高；来源：CSO住房数据 | CSO |
Normalization
标准化方法
normalized_score = (value − min) / (max − min) × 100
标准化评分 = (数值 − 最小值) / (最大值 − 最小值) × 100
Each raw metric is normalized to a 0–100 scale using min-max normalization across all 26 counties before weighting. The final score is the weighted sum, rounded to one decimal place.
每项原始指标在加权前，均使用全部26个郡的最小-最大标准化法转换为0–100分。最终评分为加权求和，保留一位小数。
Note: This score is a quantitative ranking tool to identify relative investment attractiveness across counties. It does not constitute investment advice. Property investment involves significant risk. Always consult a licensed financial adviser.
注意：本评分仅为量化排名工具，用于识别各郡相对投资吸引力。不构成投资建议。房产投资存在重大风险，请务必咨询持牌财务顾问。
How Rental Yield Is Calculated
租金收益率计算方式
Gross yield definition and what is not included
毛收益率定义及未纳入项目
Gross Yield Formula
毛收益率公式
Gross Yield = (Daft 2-bed asking rent × 12) / Daft asking price (current quarter)
毛收益率 = (Daft 2卧室挂牌租金 × 12) / Daft挂牌价格（最新季度）
This is a gross yield — before taxes, costs and vacancy. It uses the Daft 2-bed asking rent divided by the Daft asking price for the most current quarter. Where Daft asking price is unavailable for a county, the PPR median (2022–present) is used as a fallback — this typically overstates yield by 0.5–2% relative to current market prices.
这是毛收益率——未扣除税款、成本及空置期。使用Daft最新季度2卧室挂牌租金除以Daft挂牌价格。若某郡缺乏Daft挂牌价格，则以PPR成交中位价（2022年至今）作为备用，这通常会将收益率高估0.5–2%。
Rent Year-on-Year (YoY) Source Priority:
租金同比（YoY）数据来源优先级：
- Stored Daft.ie YoY (from official Daft quarterly report) — highest reliability
- RTB New Tenancies YoY (same quarter vs prior year) — covers all 26 counties
- Calculated Daft YoY (quarter-on-quarter comparison, capped ±20%) — lowest trust, used only when RTB unavailable
- Daft.ie官方季报存储值——可靠性最高
- RTB新租赁同比（同季度同比）——覆盖全部26郡
- Daft季度计算值（±20%上限）——可靠性最低，仅在RTB数据缺失时使用
Net yield would subtract taxes and ongoing costs. Use the Net Return Calculator to model net yield for specific scenarios.
净收益率需扣除税款及持续成本。请使用净回报计算器对特定情景进行净收益率建模。
| Included (Gross Yield)已纳入（毛收益率） | Excluded — use calculator for net yield未纳入——请用计算器计算净收益率 |
|---|---|
| Annual rental income (RTB 2-bed median × 12)年度租金收入（RTB 2卧室中位数 × 12） | Income tax (20–40%) + USC + PRSI所得税（20–40%）+ USC + PRSI |
| Mortgage interest repayment贷款利息还款 | |
| LPT (€315–€495/year typical)地方房产税（LPT，通常€315–€495/年） | |
| Management fees (8–12% of rent)管理费（租金的8–12%） | |
| Maintenance & repairs维护与维修费用 | |
| Vacancy periods空置期 |
Price Trend Calculations
价格趋势计算
How median prices and growth figures are derived from PPR data
如何从PPR数据推导中位价格和增长数据
Median price: PPR transaction median per county per year. We use the median rather than the mean to avoid distortion from high-value outlier transactions, which are common in the Irish market.
中位价格：按郡及年份统计的PPR交易中位价格。我们使用中位数而非均值，以避免高价值异常交易的干扰——此类交易在爱尔兰市场较为常见。
5-Year Growth
5年增长率
5-Year Growth = (2025 median − 2020 median) / 2020 median × 100
5年增长率 = (2025中位数 − 2020中位数) / 2020中位数 × 100
Asking price (Daft): Sourced from the Daft Rental Price Report, aggregated at county level. These reflect current market expectations rather than completed transaction prices.
要价（Daft）：来源于Daft租金价格报告，在郡级别汇总。这些数据反映的是当前市场预期，而非已成交的交易价格。
PPR records SALE prices; Daft reflects CURRENT asking prices. The gap between the two indicates market direction — a rising Daft asking price relative to PPR suggests upward pressure on future transaction prices.
PPR记录的是成交价格；Daft反映的是当前要价。两者之间的差距体现市场走向——若Daft要价相对PPR持续上涨，表明未来交易价格存在上行压力。
Known Limitations & Caveats
已知局限性与注意事项
Transparency about what the data cannot tell you
关于数据无法告知您的内容的透明说明
1. Rental yield benchmark. Rental yield uses 2-bedroom apartment RTB rents as the benchmark. Yields for houses, studios, or larger units will differ significantly.
1. 租金收益率基准。租金收益率以RTB 2卧室公寓租金作为基准。独立屋、开间或更大户型的收益率将存在显著差异。
2. Dublin intra-city variation. Dublin county data uses Daft's postcode-level data aggregated to a city-wide figure. Intra-Dublin variation (D4 vs D10) is significant — use the Dublin Postcodes page for granular data.
2. 都柏林市内差异。都柏林郡数据使用Daft邮政编码级别数据汇总为全市整体数字。都柏林市内差异显著（如D4与D10）——请使用都柏林邮政编码页面查看详细数据。
3. Population data vintage. Population growth figures are from the 2022 Census (2016–2022 period). CSO does not publish county-level annual population estimates; the next census is planned for 2027. Post-2022 migration trends are not reflected in county-level scores.
3. 人口数据时效性。人口增长数据来自2022年人口普查（2016–2022年期间）。CSO不发布郡级年度人口估算，下次人口普查计划于2027年进行。2022年后的移民趋势未反映在郡级评分中。
4. BER rating coverage bias. BER ratings cover properties that have been rated — unrated properties (typically older stock) are not included, which may skew results toward newer builds with higher energy ratings.
4. BER评级覆盖偏差。BER评级仅涵盖已评级的房产——未评级的房产（通常为较旧的房屋存量）未被纳入，这可能使结果偏向能效评级较高的新建房产。
5. FDI scores are relative, not absolute. FDI scores are normalized annually. A county's score reflects relative FDI attractiveness compared to other Irish counties, not an absolute figure of investment volume.
5. FDI评分为相对值，非绝对值。FDI评分每年标准化。一个郡的评分反映的是相对于其他爱尔兰郡的外商投资吸引力，而非投资额的绝对数字。
Data Update Schedule
数据更新周期
When each dataset is refreshed
每项数据集的刷新时间
| Frequency频率 | Datasets数据集 | Time (UTC)时间（UTC） |
|---|---|---|
| Weekly (Sunday)每周（周日） | Full pipeline: PPR import + CSO fetch + JSON regeneration完整流程：PPR导入 + CSO获取 + JSON重新生成 | 03:00 |
| Daily每日 | JSON statistics files regenerated from database从数据库重新生成JSON统计文件 | 03:00 |
| Monthly每月 | PPR bulk download + incremental importPPR批量下载 + 增量导入 | 1st of month每月1日 |
| Quarterly每季度 | RTB, Daft, CSO Planning/CompletionsRTB、Daft、CSO规划/竣工数据 | Within 2 weeks of CSO releaseCSO发布后2周内 |
| Annual每年 | Census population data, BER snapshot人口普查数据、BER快照 | Q1 each year每年第一季度 |
Data freshness indicator: Each page on IrelandPropertyData displays a "Last updated" timestamp so you always know how current the figures are.
数据新鲜度指示：IrelandPropertyData 的每个页面均显示"最近更新"时间戳，方便您随时了解数据的时效性。
Important: This methodology page describes how metrics are calculated as of April 2026. Algorithms and data sources are updated periodically as better data becomes available. If you have questions about a specific calculation or believe you have found an error, please contact [email protected].
Useful official sources: Property Price Register · RTB Rent Index · CSO PxStat · SEAI BER Register
Useful official sources: Property Price Register · RTB Rent Index · CSO PxStat · SEAI BER Register
重要声明：本方法论页面描述截至2026年4月各项指标的计算方式。随着更优质数据的获取，算法和数据来源将定期更新。如对特定计算有疑问或发现错误，请发送邮件至 [email protected]。
官方参考来源： 房产价格登记册 · RTB租金指数 · CSO PxStat · SEAI BER登记册
官方参考来源： 房产价格登记册 · RTB租金指数 · CSO PxStat · SEAI BER登记册