Dutch Housing Price Index

Get the Dutch national house price index (2020 = 100) and average sale prices from CBS and Kadaster, monthly, with year-on-year change and homes sold.

nl-housing-price-index

Example

Example answer

{
  "currency": "EUR",
  "homes_sold": 18200,
  "data_points": 12,
  "price_index": 138.2,
  "time_series": [
    {
      "period": "2024-10",
      "price_index": 138.2
    }
  ],
  "latest_period": "2024-10",
  "price_index_base": "2020 = 100",
  "year_over_year_pct": 9.2,
  "month_over_month_pct": 0.8,
  "average_sale_price_eur": 438000
}

Inputs

Field	Type	Required	What it is
`year`	number	No	Filter by specific year (optional)
`months`	number	No	Number of months to return (1-60, default 12)

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`homes_sold`	number	Usually (present for most inputs)
`price_index`	number	Always (present in every successful answer)
`time_series`	array	Always (present in every successful answer)
`latest_period`	string	Always (present in every successful answer)
`price_index_base`	string	Always (present in every successful answer)
`year_over_year_pct`	number	Usually (present for most inputs)
`average_sale_price_eur`	number	Usually (present for most inputs)
`month_over_month_pct`	—	Usually (present for most inputs)
`currency`	—	Always (present in every successful answer)
`data_points`	—	Always (present in every successful answer)
`note`	—	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "nl-housing-price-index",
    "inputs": {},
    "max_price_cents": 3
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "nl-housing-price-index",
    "inputs": {},
    "max_price_cents": 3
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "nl-housing-price-index",
  inputs: {},
  max_price_cents: 3,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="nl-housing-price-index",
    inputs={},
    max_price_cents=3,
))

Limitations

National-level data only
Housing price index is national (Netherlands-wide). For regional data, use nl-housing-stats or nl-woz-value.
Monthly publication lag
CBS publishes housing price data with approximately 1-2 month delay.

Bundled checks that include it

Netherlands Property Check €0.19