Property Priced In Gold

Methodology

Core Formula

The site estimates how many ounces of gold correspond to the selected regional price series in a given year. For UK markets this is an average property price, for New York City and Manhattan it is a median recorded residential sale price, for Sydney it is a median dwelling transfer price, and for the current Japan/Tokyo series it is a residential land price per m². PPIG divides the selected price series by the average gold price per troy ounce for the same year.

Formula selected price series in gold ounces=selected regional price seriesgold price per troy ounce

The result is an estimate of how many troy ounces of gold correspond to that region's selected property, transfer-price, sale-price, or residential land-price series for that year.

Property Data

For UK markets, the site uses the UK House Price Index and HM Land Registry average property price data, where available. All Properties uses the official UK HPI All property types series. Flats / Apartments uses the official UK HPI Flat/Maisonette series where that property-type data is available.

PPIG does not currently provide a Houses option because the UK HPI does not publish a standalone Houses category. The site does not combine detached, semi-detached, and terraced data into its own derived houses dataset.

New York City is handled differently. It uses median recorded residential sale price data rather than the average property price methodology used for UK regions. As a result, New York City comparisons should be interpreted as a market-specific historical comparison rather than a direct like-for-like comparison with the UK methodology.

Sydney uses ABS Total Value of Dwellings Table 2 median transfer price data. Houses uses the ABS Median Price of Established House Transfers series. Apartments uses the ABS Median Price of Attached Dwelling Transfers series; the underlying ABS attached dwelling category includes flats, units, apartments, townhouses, semi-detached, row and terrace houses. Annual Sydney values are calculated as the arithmetic average of the four quarterly median transfer prices.

Japan Residential Land Priced in Gold and Tokyo Residential Land Priced in Gold use the MLIT Land Market Value Publication (Chika Koji) rather than dwelling transaction prices. This is an observed land-price-per-square-metre series: it tells you the official residential land price per m², not the sale price of a completed home. For Japan, PPIG takes the arithmetic average of all selected residential standard sites in each year. For Tokyo, PPIG applies the same calculation after filtering standard sites whose administrative-area code begins with Tokyo prefecture code 13. The currently used MLIT archives cover 1983–2025.

The next planned Japan/Tokyo transaction series is different. Japan Used Condominium Median Transaction Price Priced in Gold and Tokyo Used Condominium Median Transaction Price Priced in Gold should use observed MLIT Real Estate Information Library transaction records from XIT001, with priceClassification=01, Type set to 中古マンション等, and annual median TradePrice from 2006 onward. Japan should combine all prefectures; Tokyo should use area 13. This will measure observed used-condominium transaction prices, not land price per m².

A possible later interpretation series should also be kept separate: Reference Detached-House Plot Land Value Priced in Gold. That would be a derived 2023 reference plot-size land-only estimate, calculated as annual residential land price per m² multiplied by the 2023 mean detached-house site area. It would exclude the building value and must not be described as an average historical property price. PPIG should not create apartment estimates by multiplying land price per m² by apartment floor area, because apartment floor area is not the same as land area.

Different markets may use different official or market-standard data sources depending on availability, coverage, and the way local property markets report prices.

Gold Price Data

The site uses published historical gold price data from external sources. Annual average gold prices are used throughout the site and are expressed in the same currency as the underlying property data.

Limitations

  • Average and median prices are not the same, and markets using one measure may not be perfectly comparable with markets using the other.
  • UK and international markets may not be perfectly comparable because local data collection, property types, and transaction records can differ.
  • UK Flats / Apartments coverage begins where the official UK HPI Flat/Maisonette data exists for the selected region.
  • The current Japan and Tokyo Residential Land series are residential land-price-per-square-metre series, not average dwelling prices or transaction medians. They should be interpreted as land-price comparisons, not complete-home purchase-price comparisons.
  • Future Japan/Tokyo used-condominium transaction series should be interpreted as observed transaction-price medians for used condominiums only. They should not be mixed with the longer residential land-price-per-square-metre series.
  • Any future detached-house plot-size estimate would be a derived 2023 reference-size land-only calculation. It would exclude the building value and would not represent an observed average historical property sale price.
  • The MLIT Japan/Tokyo calculation uses standard sites available in the 1983–2025 Land Market Value Publication archives and the current-use residential classification. Changes in the standard-site sample and site attributes over time can affect the average.
  • Property data may include different property types depending on the source.
  • Gold prices fluctuate daily, while the historical charts use annual averages.
  • Inflation, taxes, maintenance costs, rent, mortgage costs, and transaction costs are not included unless explicitly stated.

Data Sources

Educational Use Only

Property Priced In Gold is for historical comparison and educational analysis. It is not financial advice, investment advice, tax advice, or a recommendation to buy or sell property, gold, or any other asset.