Sold Prices API

The Sold Prices API returns recent property sold prices near a given UK postcode with comprehensive filtering options. Results include individual property sales with address, price, date, property type, and size data, plus summary statistics including average and median prices.

Data included in the response:

• Individual sold prices — address, price, date, property type, bedrooms, square footage, price per sq ft/m², tenure, and distance from search postcode
• Summary statistics — total results, average price, median price, price range (min/max), and average days on market

This API is ideal for:

• Property valuation tools needing comparable sold prices
• Market analysis dashboards showing local price trends
• Estate agents providing evidence-based price recommendations
• Mortgage lenders verifying property values
• Property investors researching local markets

All requests to the Sold Prices API require authentication using an API key. You can obtain your API key from your PropertyInsights dashboard after subscribing to an API plan.

Include your API key in the request header as follows:

X-API-Key: your_api_key_here

Base URL

https://propertyinsights.co.uk/api/v1/

/property/sold-prices

Successful chargeable JSON responses include a top-level billing object. The endpoint examples on this page focus on the endpoint-specific data, so this repeated block may not be shown in every example.

"billing": {
  "mode": "prepaid",
  "creditsCharged": 1,
  "creditsRemaining": 1999,
  "creditsRefreshAt": "2026-08-14T09:30:00.000Z"
}

All authenticated API-key calls expose the billing headers, including validation errors and zero-credit status or management requests. Only successful chargeable JSON responses add the billing object to the response body.

The response is returned in JSON format with the following structure:

{
  "success": true,
  "data": {
    "soldPrices": [ ... ],
    "summary": {
      "totalResults": 45,
      "returned": 20,
      "averagePrice": 325000,
      "medianPrice": 310000,
      "priceRange": { "min": 180000, "max": 550000 },
      "averageDaysOnMarket": null
    }
  }
}

soldPrices (array)

Each item in the array represents a single property sale.

{
  "address": "12 High Street",
  "postcode": "SW1A 2AB",
  "price": 320000,
  "date": "2025-11-15",
  "propertyType": "Semi-detached",
  "bedrooms": 3,
  "bathrooms": null,
  "squareFeet": 1050,
  "pricePerSqM": 2830,
  "pricePerSqFt": 305,
  "tenure": "Freehold",
  "distance": 0.2,
  "coordinates": {
    "lat": null,
    "lng": null
  }
}

The API uses standard HTTP status codes to indicate the success or failure of requests.

Error Response Example

{
  "success": false,
  "error": {
    "code": "MISSING_POSTCODE",
    "message": "Postcode parameter is required"
  }
}