Property price data sources in Slovakia: what is public and what is not

Two official series, and a cadastre that keeps prices private

Slovak residential price data splits along one line. Asking prices are published often, in euros per square meter and with regional and dwelling-type detail. Transaction prices are published rarely and only as indices. The asking side is owned by Národná banka Slovenska (NBS), which has reported average prices of housing quarterly for two decades, built on the database of the National Association of Real Estate Offices (NARKS) and, in the current commentary, on United Classifieds portal data. Its Q2 2026 commentary puts the national average at 3,041 EUR/m2, up 1.2 percent on the quarter and 9.5 percent on the year.

The transaction side belongs to the Štatistický úrad SR (ŠÚ SR), which compiles the index of realized prices of dwellings under the EU house price index regulation. Eurostat republishes it as the quarterly dataset prc_hpi_q. It is an index, not a price level: the national series runs from Q1 2011 on a 2010 = 100 base, the regional series from 2022, and Eurostat shows the Slovak index at 222.70 on a 2015 = 100 base in Q1 2026, an annual change of 14.4 percent.

What is missing is any public record of individual sale prices. The cadastre run by the Úrad geodézie, kartografie a katastra (ÚGKK) publishes ownership sheets, parcels, buildings and flats, but the purchase contract that carries the price sits in the zbierka listín, and the Cadastral Act restricts access to that collection to owners, other authorized persons and their legal successors. Anyone who needs a price level rather than an index therefore works from asking prices, from the agency-based Realitná únia barometer, or from bank and consultancy commentary layered on the same inputs.

Source inventory

Every public source of Slovak residential price information, with what it actually contains. Only the two NBS rows and the Realitná únia rows give levels in euros per square meter; the statistical office and Eurostat give indices; the cadastre gives no prices at all.

Publisher pages as fetched in September 2026; see the sources list at the end of this page.

NBS: the asking-price series everyone quotes

NBS is obliged, as a member of the European System of Central Banks, to report and forecast housing prices to the ECB. Its methodology note is explicit about where the numbers come from: the NARKS database, which gathers records from firms that broker the purchase and sale of property. NARKS reports several price variants for each dwelling type, among them the average asking price per square meter, a representative average asking price with extreme values removed, and a representative realized price. For practical reasons, chiefly the number of records available per region, NBS uses only the average asking price in EUR/m2. The note adds that the degree of agreement between asking and realized prices depends on how developed the market is.

The aggregation runs in three steps. Representative average asking prices per square meter for each type of existing flat are taken per okres straight from the NARKS output; for houses, which NARKS reports as total prices, NBS divides by a conventional floor area of 150 m2 for family houses and 250 m2 for villas. Okres figures are then averaged up to kraj level, weighted by the number of offers recorded. Finally, the national figure is a weighted average of the eight kraje with fixed weights that are meant to reflect each region's long-run share of transactions: Bratislava 0.51, Trnava 0.13, Trenčín 0.05, Nitra 0.06, Žilina 0.07, Banská Bystrica 0.05, Prešov 0.04 and Košice 0.09, revised in 2019 on a ten-year average of realized transactions.

Two things follow for anyone using the series. First, the national average is heavily Bratislava-weighted by design, so it moves with the capital even when the rest of the country does not. Second, the current quarterly commentary carries the source line United Classifieds, NARKS, NBS, which means portal data from the largest Slovak advertising group is now part of the input. The commentary for Q2 2026 reports flats at 3,430 EUR/m2 (up 1.6 percent on the quarter and 10.2 percent on the year) and houses at 2,163 EUR/m2 (up 2.1 percent on the quarter and 3.1 percent on the year), with new builds rising 2.9 percent against 0.7 percent for older stock, and it notes that the number of adverts has oscillated around the same level for almost three years.

The NBS page also links an RRE dashboard, refreshed with each quarter, which turns the price series into composite indicators: price growth relative to economic fundamentals, a regional affordability index, loan capacity and a decomposition of price growth. Its September 2026 reading states that asking prices are growing faster than the economy would justify, with affordability deteriorating most in the Trenčín and Žilina regions. The dashboard is built on NBS Occasional Paper 1/2024. Note the methodology break: the long XLSX series on the original NARKS-only method is published separately as data under the old methodology and ends with Q4 2021, so a continuous 20-year regional series in one file does not exist.

ŠÚ SR and Eurostat: the transaction-based index

The only official measure of what buyers actually paid is the index of realized prices of dwellings compiled by ŠÚ SR. It follows Regulation (EU) 2016/792 and the implementing Regulation (EU) 2023/1470, which define the house price index as the price change of all dwellings bought by households, new and existing, from market transactions only. National statistical institutes compile it and Eurostat assembles the European aggregates. ŠÚ SR publishes it in two DataCube cubes: sp1002qs, the national series from Q1 2011 on a 2010 = 100 base, and sp3801qr, the regional series from 2022 covering the Slovak Republic, the NUTS 2 areas and the eight kraje, each split into all dwellings, new dwellings and existing dwellings, with quarter-on-quarter and year-on-year variants.

Both cubes are served by an open JSON-stat API at data.statistics.sk with no registration. The regional cube was last updated on 31 August 2026 and carries a note that indices for Q1 2022 to Q1 2024 were revised following Eurostat guidance on updating the weights used in the calculation, which is a reminder that transaction indices are revised as late deeds arrive and weights are refreshed. The same statistics reach Eurostat as the Slovak column of prc_hpi_q, released about one quarter and one week after the reference period. The 2 July 2026 release shows the Slovak index at 198.85, 208.52, 214.92 and 222.70 for Q2 2025 through Q1 2026 on a 2015 = 100 base, with annual changes of 11.3, 13.4, 12.8 and 14.4 percent.

Two limits matter. The index says nothing about the price level: there is no official euro-per-square-meter figure for realized prices, and there is no okres or town detail, only the eight kraje. And its input is the price on the contract, which reaches the statistical office after the cadastre registers the transfer, so the index lags the market by a quarter or more, whereas asking prices lag by days. The NBS methodology note points at the legal root of the transaction data: an amendment of the Cadastral Act effective 1 October 2018 created the legal basis for collecting and providing price information from the cadastre, which NBS describes as the precondition for eventually building reliable price maps.

What the ÚGKK cadastre publishes, and what it does not

The Slovak cadastre is the most complete public property register in the country and the most often misunderstood price source, because it holds prices but does not publish them. Through the ESKN portal the public can search ownership sheets (listy vlastníctva), parcels, buildings and flats, and owners and other entitled persons; the ZBGIS map client shows the same records on the cadastral map. Some ESKN services require a login with an electronic identity card, and official extracts are a paid service, but viewing is free. None of these views contains a purchase price.

The price lives in the purchase contract, and the contract lives in the zbierka listín, the collection of documents behind each entry. Section 68 paragraph 3 of the Cadastral Act (zákon 162/1995 Z. z.) states that access to documents stored in the collection is allowed only to the owner or another authorized person, their legal predecessors and legal successors, and to a closed list of professions and authorities: surveyors, court experts in geodesy, courts, prosecutors, the police, notaries, bailiffs, insolvency administrators, tax offices, the cadastral authority's own staff and the security services. A buyer researching a street cannot look up what the neighboring flat sold for.

That is why no Slovak equivalent of a public sale-price register exists and why every level published in euros is an asking price or an agency-reported figure. The cadastre still matters for price work: it supplies the legal floor area of flats, the building and parcel identifiers, encumbrances such as mortgages, and the transfer events that mark when a property changed hands. It is the spine to which asking prices and indices can be attached, not a source of the prices themselves.

Portals, the Realitná únia barometer and market commentary

Portal data is the raw material beneath most Slovak price statistics. The large portals (nehnutelnosti.sk, reality.sk and topreality.sk among them) carry asking price, floor area, layout, condition, location and photographs for each advertised property, refreshed daily. That granularity is unmatched by any official source, which is why NBS now credits United Classifieds in its commentary. The weaknesses are equally structural: the same flat is often advertised by several agencies at different prices, offers are withdrawn or repriced without trace, the asking price is the seller's opening position rather than the outcome, and the mix of what is advertised shifts with the season and the cycle. A median of raw offers therefore measures the advertised stock, not the market, unless duplicates are resolved and composition is held constant.

The Realitná únia SR publishes the Realitný barometer as a monthly reading of flat prices in the eight regional capitals, examining more than 20,000 flats each month and combining advertised prices from the main portals with a registry of transaction prices kept by member offices. Its quarterly ranking of 30 selected towns, all with more than 20,000 inhabitants, tracks the asking price of older three-room flats of about 70 m2 from 2021 onward, which makes it the only public series with town-level history outside the regional capitals. NARKS, the association whose database feeds NBS, has run a price-map project and a real-estate health index of its own, but its microdata is not public.

Commercial commentary sits on top of these inputs rather than beside them. Bank research departments and consultancies publish quarterly notes on Slovak housing that restate NBS or portal figures with their own regional cuts and forecasts, and price-map products aggregate portal offers by locality. They are useful for interpretation and for okres-level color, but they do not add a new primary source: when a report quotes a level in euros per square meter for a Slovak town, it is an asking price or an agency figure, and the underlying data usually traces back to the rows in the inventory above.

Asking prices versus transaction prices

The two official series are not measuring the same thing, and the gap between them is not constant. NBS reports asking prices up 9.5 percent year on year in Q2 2026; Eurostat reports transaction prices up 14.4 percent in Q1 2026. Those are different quarters and different baskets, one weighted by offers and one by completed purchases, so the difference is not a discount figure. The NBS methodology itself says the agreement between asking and realized prices depends on the stage of the market. The table sets out which family answers which question.

NBS methodology note and Q2 2026 commentary; Eurostat prc_hpi_q, 2 July 2026 release.

A working order for using the sources

A practical sequence for anyone building a Slovak price view, from the official anchor to the granular signal.

1. 1

   Anchor on the transaction index

   Pull ŠÚ SR cube sp3801qr for the kraj you care about and the national sp1002qs series. Use the year-on-year variant for direction and the 2010 = 100 variant for cumulative change. Check the update date and the revision note before comparing vintages.

2. 2

   Add the NBS level

   Take the NBS quarterly tables for the euro-per-square-meter level by kraj and dwelling type, and read the Rýchly komentár for the drivers. Remember that the national figure carries fixed regional weights with Bratislava at 0.51, so build regional views from the kraj rows, not from the headline.

3. 3

   Fill towns from the barometer and portals

   Below kraj level the only public history is the Realitná únia barometer: eight regional capitals monthly, thirty towns quarterly for older three-room flats. For anything else, current portal offers give a cross-section but no history, so treat them as a level for this month, deduplicated across agencies.

4. 4

   Use the cadastre for structure, not prices

   Join the ESKN or ZBGIS records for floor area, building identity and encumbrances, and record transfer events as timing signals. Do not expect a price: § 68 keeps the purchase contract out of public reach, and no public price map has yet been built from the 2018 legal basis.

How a model combines these sources

A price model treats these sources as layers with different jobs. The transaction index sets the direction and the revision discipline, the NBS series sets the regional level, the barometer anchors towns, and deduplicated portal offers supply the daily, property-level signal that is then mix-adjusted so that a change in what is advertised is not mistaken for a change in price. Bytero publishes an index built on that method, with each step gated on sample size before it is shown. Availability by market is listed on the coverage page.

Questions