Council Tax Band for Any UK Property — One API Call

import requests

response = requests.get(
    "https://api.homedata.co.uk/api/council_tax_band/",
    params={
        "postcode": "SW1A 2AA",
        "building_number": "10",
    },
    headers={"Authorization": "Api-Key YOUR_API_KEY"},
)
data = response.json()
print(f"{data['address']} — Band {data['council_tax_band']}")

const response = await fetch(
  "https://api.homedata.co.uk/api/council_tax_band/?postcode=SW1A+2AA&building_number=10",
  { headers: { "Authorization": "Api-Key YOUR_API_KEY" } }
);
const data = await response.json();
console.log(`${data.address} — Band ${data.council_tax_band}`);