Get UK company registered office address

company.uk.registered_officev1.0.0betaregion GB

Return the current registered office address of a UK company from the official register as structured fields plus a single-line rendering suitable for correspondence and matching.

Account price

USD 0.002

per successful call · introductory

x402 price

USD 0.003

accountless, settled per call · introductory

Provenance

companies_house

cache: shared · ttl 300s

Endpoint

GET https://api-staging.eckari.com/v1/companies/uk/{companyNumber}/registered-office

curl -i "https://api-staging.eckari.com/v1/companies/uk/01234567/registered-office"

Without credentials the gateway responds 402 with a PAYMENT-REQUIRED header (x402 v2). Retry with PAYMENT-SIGNATURE. See docs.

Use when

What is the registered office address of company 01234567?
Where is this UK company registered?
Give me the postcode of this limited company's registered office.

Do not use when

Need the whole company profile as well; use company.uk.profile (it includes the address).
Need officer correspondence addresses; use company.uk.directors.
Need trading or branch addresses (not held on the register).

Synonyms

registered office addresscompany address UKCompanies House address lookupregistered address postcode

Input schema

{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "companyNumber"
  ],
  "properties": {
    "companyNumber": {
      "type": "string",
      "description": "Companies House company number. Whitespace is ignored and short numeric values are zero-padded to 8 characters.",
      "minLength": 1,
      "maxLength": 10,
      "pattern": "^[A-Za-z0-9 ]+$"
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "company_number",
    "address",
    "single_line"
  ],
  "properties": {
    "company_number": {
      "type": "string"
    },
    "address": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "premises": {
          "type": [
            "string",
            "null"
          ]
        },
        "address_line_1": {
          "type": [
            "string",
            "null"
          ]
        },
        "address_line_2": {
          "type": [
            "string",
            "null"
          ]
        },
        "locality": {
          "type": [
            "string",
            "null"
          ]
        },
        "region": {
          "type": [
            "string",
            "null"
          ]
        },
        "postal_code": {
          "type": [
            "string",
            "null"
          ]
        },
        "country": {
          "type": [
            "string",
            "null"
          ]
        }
      }
    },
    "single_line": {
      "type": "string",
      "description": "Derived comma-separated rendering of the non-empty address parts."
    }
  }
}

Example input · registered_office

{
  "companyNumber": "01234567"
}

Example response

{
  "data": {
    "company_number": "01234567",
    "address": {
      "premises": "1",
      "address_line_1": "Example Street",
      "address_line_2": null,
      "locality": "London",
      "region": null,
      "postal_code": "EC1A 1AA",
      "country": "England"
    },
    "single_line": "1 Example Street, London, EC1A 1AA, England"
  },
  "meta": {
    "capability": "company.uk.registered_office",
    "version": "1.0.0",
    "retrieved_at": "2026-08-17T12:00:00Z",
    "source": "companies_house",
    "freshness": "live",
    "request_id": "req_example"
  }
}

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