Poland Apartment Valuation (AVM) – value from real notarial deed prices

How much is this apartment worth? Give an address in Poland and the floor area – get an automated valuation based on what buyers actually paid in notarial deeds nearby, not on asking prices from listing portals.

The estimate comes from Poland's official Real Estate Price Register (Rejestr Cen Nieruchomości, RCN), the register of notarial deeds kept by Polish counties and published by GUGiK. Comparable sales are adjusted to today's price level and weighted by how similar they are to your apartment.

What you get (one record per apartment)

• estimated value in PLN and price per m²
• value range (25th–75th percentile of similar sales) and a confidence level (high / medium / low)
• the 10 most similar sales used: month or date, price, area, price per m², rooms, floor, street, distance
• the local market: median price per m² in the area, quarterly trend, year-on-year change, newest deed
• developers' asking prices for similar new apartments within 2 km (from their mandatory daily price lists) – a useful reference for new builds
• notes on data quality and the full methodology

Example

Input:

{
  "location": "Kraków, Długa 12",
  "areaM2": 54,
  "rooms": 2,
  "floor": 3
}

Output (shortened, real run from October 2026):

{
  "recordType": "valuation",
  "estimatedValuePln": 930000,
  "estimatedPricePerM2Pln": 17226,
  "valueRangePln": { "low": 800000, "high": 1121000 },
  "confidence": "medium",
  "comparablesUsed": 312,
  "searchRadiusM": 1000,
  "localMarket": { "salesInRadius": 902, "medianPricePerM2Pln": 18595, "lastDeedMonth": "2026-08" },
  "newBuildAskingPrices": { "offers": 278, "medianPricePerM2Pln": 22900, "radiusM": 2000 },
  "comparables": [
    { "month": "2026-08", "priceTotalPln": 1240000, "areaM2": 58.19, "pricePerM2Pln": 21309.5, "roomsInclKitchen": 3, "floor": 3, "street": "Władysława Spasowskiego", "distanceM": 440, "similarity": 1.0 },
    { "date": "2026-01-08", "priceTotalPln": 837000, "areaM2": 46.69, "pricePerM2Pln": 17926.75, "adjustedPricePerM2Pln": 17233, "roomsInclKitchen": 3, "floor": 2, "street": "Biskupia", "distanceM": 303, "similarity": 0.909 }
  ]
}

More real results from the same day:

Apartment	Estimate	PLN / m²	Confidence
Warszawa, Puławska 100 · 48 m² · 2 rooms	792,000 PLN	16,494	high
Gdańsk, Grunwaldzka 100 · 60 m² · 3 rooms	749,000 PLN	12,476	medium
Wieliczka, Słowackiego 5 · 50 m²	646,000 PLN	12,917	high
Zakopane, Krupówki 10 · 40 m²	762,000 PLN	19,059	medium
Lublin, Narutowicza 20 · 65 m² · 3 rooms	570,000 PLN	8,765	high

A valuation takes a few seconds.

Value many apartments at once

Put up to 100 apartments in apartments – useful for portfolios, lenders, property managers and lead scoring:

{
  "apartments": [
    { "location": "Gdańsk, Długa 1", "areaM2": 48, "rooms": 2, "floor": 3 },
    { "location": "Poznań, Półwiejska 20", "areaM2": 63, "rooms": 3 },
    { "location": "Wrocław, Świdnicka 10", "areaM2": 37, "market": "secondary" }
  ]
}

Each successful valuation is a separate record (and a separate charge). Addresses that cannot be valued get an error record and are not charged.

Use it from an AI assistant (MCP)

Connect the Apify MCP server to Claude, ChatGPT, Cursor or your own agent and ask in plain language, for example: "How much is a 54 m² two-room flat at Długa 12 in Kraków worth? Use notarial deed prices." The assistant calls this Actor and answers with the estimate, the range and the comparable sales.

How the estimate is calculated

1. Comparable sales – apartment sales from notarial deeds within 1 km (extended to 2.5 km or 6 km when there are too few), from the last 24 months by default. Only market sales of full ownership with a plausible price per m² are used.
2. Time adjustment – each sale is moved to today's price level with the local quarterly trend (smoothed, at most ±15%).
3. Similarity weights – distance, floor area (±30% weighs most), number of rooms, floor and how recent the sale is.
4. Estimate – the weighted median price per m² × your floor area; the range is the weighted 25th–75th percentile.
5. Confidence – high when there are many similar sales and prices are consistent; lower when sales are few, prices vary a lot or only the street/city of the address was recognised.

This is an automated valuation model (AVM), not a formal appraisal by a licensed valuer (operat szacunkowy). It does not see the apartment's condition, view, building age or standard – the range shows how much similar apartments differ.

Who uses it

• Buyers, sellers and investors – a fact-based price check before an offer or a listing.
• Real estate agents – a quick, sourced valuation for a client meeting.
• Lenders, fintechs and proptech – automated pre-valuation and portfolio monitoring through the API.
• AI agents – call it through the Apify MCP server to answer "how much is my flat in Poland worth?" with official data.

Pricing (pay per event)

Event	Price
Apartment valuation (only when an estimate is produced)	$0.49

Comparable sales, the local market and developers' asking prices are included at no extra cost.

Inputs

Field	Description
location	Street and building number in Poland (Polish characters), or coordinates 50.06, 19.94.
areaM2	Usable floor area in m² (10–400).
rooms	Rooms as in listings, kitchen not counted (optional).
floor	0 = ground floor (optional).
market	secondary (resale, default), primary (new from a developer) or any.
monthsBack	Period of sales to use, 12–60 months (default 24).
apartments	Optional list of apartments for a batch run.

Data sources and privacy

• Notarial deeds: Rejestr Cen Nieruchomości, GUGiK – official bulk export plus the register's live web service for the newest deeds. Public data, free to access since 13 Feb 2026.
• Developers' asking prices: official daily price lists published on dane.gov.pl.
• No personal data: the register has no names of buyers or sellers; deed numbers and notaries are not used.
• Counties publish deeds with a delay of weeks to months; every result shows the newest deed month used.

Related Actors

• Poland Real Estate Transaction Prices – area statistics and the full list of deeds for any location.
• Poland New-Build Apartment Prices – every developer offer around an address.
• Poland Housing Price Gap – asking vs transaction prices for any location.

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Po polsku – wycena mieszkania online na podstawie aktów notarialnych

Ile jest warte mieszkanie? Podajesz adres i metraż (opcjonalnie liczbę pokoi i piętro), a agent szacuje wartość mieszkania na podstawie prawdziwych cen transakcyjnych z aktów notarialnych z Rejestru Cen Nieruchomości (RCN) – nie cen z ogłoszeń. Dostajesz szacowaną cenę, cenę za m², przedział wartości, poziom pewności, 10 najbardziej podobnych transakcji z okolicy oraz ceny ofertowe deweloperów w promieniu 2 km. Działa dla całej Polski: Warszawa, Kraków, Wrocław, Gdańsk, Poznań, Łódź i mniejsze miasta. To automatyczna wycena (AVM), a nie operat szacunkowy rzeczoznawcy.