Methodology

Everything in Market Data starts with the transaction record held by the Department of Lands and Surveys (DLS). We add our own analysis on top; we never publish a figure we can’t trace to a registered deal.

Sources

• Contracts of sale deposited with the DLS. Our primary source: they appear soon after a deal is signed and carry the agreed price.
• Transfers of title. Used where a review says so; they lag the contract, often by years for off-plan property.
• Our own models and site visits, for context. These are always labelled as Allora analysis.

Cleaning

One deal can appear on several rows of a DLS extract, one per property in the deal, each with the full price. We de-duplicate so every contract is counted once and its price is attached once. Price per square metre uses covered area.

What we publish, and what we don’t

• Aggregates only. We publish counts, medians, totals and shares for groups of deals. We never publish individual transactions, plot or file numbers, or the names of buyers and sellers.
• Every figure shows its n, the number of transactions behind it.
• Small groups are suppressed. If fewer than five transactions sit behind a figure, we show “—” instead of a number.
• Rounding. Totals to the nearest €0.1M, €/m² to the nearest €10, percentages to one decimal place.
• Corrections are visible. If a figure changes after publication, the post shows an update date and a note saying what changed.

Each review offers its figures as a CSV download. It contains exactly what the page shows, nothing more.

Glossary

Contract of sale

A sale agreement deposited with the Department of Lands and Surveys (DLS). Deposit protects the buyer and usually happens soon after signing, so it is the earliest reliable signal of a deal.

Transfer

The change of title deed into the buyer's name. Transfers can lag the contract by months or years, especially for off-plan property.

Median €/m²

The middle price per square metre of covered area across the deals in a group. Half the deals are above it, half below. We use the median, not the average, because a few large deals distort averages.

n

The number of transactions behind a figure. Figures based on fewer than five transactions are not shown.

De-duplication

One sale can appear on several rows of a DLS extract (one per property in the deal). We count each contract once and attach its price once, so totals are not double-counted.

Suppressed

A figure we hold back because too few transactions sit behind it to be reliable or anonymous.