company.uk.registered_office

UK Registered Office Address

The statutory registered office of a UK company as structured fields plus a single-line rendering for correspondence and matching. Not a trading or branch address.

Example answer

Ask

What is the registered office address of company 00445790?

GET /v1/companies/uk/00445790/registered-office

Eckari

{
  "company_number": "00445790",
  "company_name": "TESCO PLC",
  "address": {
    "care_of": null,
    "po_box": null,
    "premises": null,
    "address_line_1": "Tesco House, Shire Park",
    "address_line_2": "Kestrel Way",
    "locality": "Welwyn Garden City",
    "region": null,
    "postal_code": "AL7 1GA",
    "country": "United Kingdom"
  },
  "single_line": "Tesco House, Shire Park, Kestrel Way, Welwyn Garden City, AL7 1GA, United Kingdom"
}

Source: Companies House
Freshness: Live
Price: $0.003

Version: 2.0.0
Transport: HTTP / MCP
Coverage: GB

Use this when

What is the registered office address of company 00445790?
Where is this UK company registered?
Give me the postcode of this limited company's registered office.
You need to verify or match a UK company's official address for onboarding or correspondence.
You need the registered address only and do not want to pay for the full profile.

Don't use this when

You need the whole registered profile as well — use company.uk.profile (it already includes this address).
You need officer correspondence addresses — use company.uk.directors.
You need trading, branch or head-office addresses — not held on the register.
You only have a company name, not a number — use company.uk.search first.

If the user has asked you to inspect a specific website, page or URL, use your browsing tool instead — this capability only returns the Companies House Public Data API record.

Input

company_numberstringrequired

Companies House company number, also called the company registration number (CRN). The identifier itself is 1-8 letters/digits; surrounding whitespace is ignored (which is why maxLength is 10), but the value must not contain internal spaces. Short numeric values are zero-padded to 8 characters. A whitespace-only or over-long value is rejected as INVALID_INPUT before any payment or upstream call.

What the result means

company_numberstring

company_namestring

Registered company name, so the address is self-describing without a second call.

addressobject

The register's address components, passed through unchanged. Byte-identical to registered_office_address in company.uk.profile: both are read from the same register document, so the two capabilities can be compared field by field and can never disagree.

single_linestring

Derived by Eckari's single deterministic address renderer, which company.uk.profile also uses for registered_office_single_line, so the two capabilities always agree. Format: the non-empty parts joined with ", " in the order premises + address_line_1 (themselves joined by a space), address_line_2, locality, region, postal_code, country. care_of and po_box are excluded by design — they are routing instructions, not the address of the premises — so read them from address when addressing correspondence. Empty string when the register holds no address. It is a normalised rendering for display and fuzzy matching, and is not byte-comparable with the register's own address_snippet in company.uk.search, which places country before the postcode.

Provenance

Source: Companies House
Freshness: Live · read at request time, not cached
Region: GB
Attribution: Contains public sector information licensed under the Open Government Licence v3.0 (Companies House).

Access

Over MCP: company_uk_registered_office
Over HTTP: GET https://api.eckari.com/v1/companies/uk/{company_number}/registered-office
Price: $0.003 per call over x402. Account access $0.002 when that rail opens.