Table: A summary of the main house price indices
| Source data | Observations | Quality adjustment method | Local indices | Frequency | Price Observations | |
|---|---|---|---|---|---|---|
| Halifax | Loan approvals | 15,000 | Hedonic Regression | Regional only | Monthly | Valuation at time of loan approval |
| Nationwide | Loan approvals | 12,000 | Hedonic Regression | Regional only | Monthly | Mortgage completions |
| Zoopla | Estate agents | 4,000 | Mix Adjustment | No | Monthly | Estate agents reports |
| Calnea/Home.co.uk | Asking prices online | 700,000 | Mix Adjustment | Regional only | Monthly | Asking price |
| Rightmove | Asking prices online | Undisclosed | None | Regional only | Monthly | Asking price |
| LSL Acadata | Various | 100,000 | Mix Adjustment | Regional only | Monthly | Actual price paid |
| UK House Price Index | Various | 125,000 | Hedonic Regression | Yes | Monthly | Actual price paid and mortgage completions |
| Reallymoving House Price Forecast | Conveyancing quotes | 6,000 | Mix Adjustment | Yes | Monthly | Valuation before conveyancing commences |
