Every limited company registered in the UK must have a companies house address — a registered office address that appears on public record at Companies House. Most business owners sort this once and forget it. The problem is that this address touches everything from legal correspondence to your Google Ads account verification, and getting it wrong creates friction in places you wouldn't expect.
This article explains what a companies house address is, why it matters operationally, how it connects to your business's advertising and verification processes, and what SME owners often get wrong when managing it alongside their marketing accounts.
What Is a Companies House Address?
A companies house address is the official registered office address of a UK limited company, as recorded with Companies House. It must be a physical address — not a PO box — located in the same country where the company is incorporated. For a company registered in England and Wales, the address must be in England or Wales.
This address is publicly visible on the Companies House register. Anyone can look it up. That means it appears on your letters from HMRC, your statutory filings, and any legal notices served on your company. It is not required to be where you actually trade from, which is why many sole directors use a registered agent's address or a serviced office.
The address cannot be a PO box number, though it can be a c/o address at an accountant's or solicitor's office, provided there is an actual physical location behind it. Companies House will accept mail at this address on behalf of your company, which is why the choice matters more than people realise.
See how Overtime handles Google Ads account verification automatically
Companies House Address and Business Verification
Where the companies house address becomes operationally relevant for SMEs — beyond compliance — is in third-party verification processes. Google, for example, requires advertisers to verify their business identity when certain thresholds are reached, particularly for financial services, political advertising, and other regulated categories. The verification process often cross-references your registered business address against public records.
If the address you've entered in your Google Ads account doesn't match your companies house address, verification requests can stall. We saw this repeatedly during our nine years running a marketing agency — clients would have a trading address in their Google Ads billing settings and a different registered address on Companies House, and the mismatch would trigger a verification hold that paused campaigns mid-month.
The fix is straightforward: keep your registered address, your billing address in Google Ads, and any business verification documents consistent. But catching the mismatch in the first place requires someone to actually be looking at the account.
Why Address Mismatches Cause Campaign Disruption
Google's advertiser verification process has tightened considerably. When a verification request is issued and cannot be matched against a consistent address across documents, the account can be restricted. Impressions drop, campaigns pause, and — if you're not monitoring the account daily — you may not notice for several days. By then you've lost budget and, more importantly, position in auctions you'd been building over weeks.
For more on how ad costs behave when campaigns are disrupted, see our guide to ad cost on Google for SMEs.
Registered Office Address: Your Options Compared
There are several ways to fulfil the registered office requirement. Each has different cost and privacy implications.
| Option | Typical Annual Cost | Privacy | Suitable For |
|---|---|---|---|
| Home address | £0 | None — publicly visible | Sole directors comfortable with public disclosure |
| Accountant's address | £0–£150 | Good | Companies with an existing accountant relationship |
| Registered agent service | £50–£200 | Good | Any company wanting separation between trading and registered address |
| Serviced office / coworking | £300–£1,200+ | Moderate | Companies wanting a prestigious address |
| Virtual office provider | £50–£300 | Good | Remote-first businesses |
Using your home address is the most common choice for early-stage businesses and the one people most often regret. Because the companies house address is public record, it appears in data broker databases almost immediately. Switching later is simple — you file a change of registered office with Companies House — but you cannot retrospectively remove the historical address from the public register.
How to Change Your Companies House Address
Changing your registered office address is a straightforward filing. You submit form AD01 via the Companies House WebFiling service, or you can file it through a formation agent or your accountant. The change takes effect immediately on filing, and the new address appears on the public register within 24 hours in most cases.
There is no fee for filing AD01 online. If you change your address, remember to update your Google Ads billing details, your HMRC correspondence address, your bank's records, and any other third-party accounts that hold your business address. The companies house address is the source of truth that other verifications are checked against, so keeping everything aligned saves time later.
For context on how advertising accounts are structured and what information they hold, our guide to Google Pay Per Click Management for SMEs covers the account setup side in detail.
Companies House Address in the Context of PPC Account Management
The practical connection between your companies house address and PPC account management is narrower than people expect, but when it matters, it really matters. The three scenarios where we've seen it create genuine problems are: advertiser verification requests from Google, billing disputes where the company address on invoices doesn't match the registered entity, and disputes with Google Ads support where proof of business identity is required.
See what's included in Overtime's managed Google Ads approach
In each case, the underlying issue is the same: the address on file somewhere doesn't match the address on public record. Keeping a single authoritative source — your companies house address — and making sure it propagates to every platform you advertise on is the unglamorous admin work that prevents these headaches.
This is one of the reasons automated account management matters. An AI agent that monitors your account daily will flag verification notices, billing holds, and policy alerts before they become campaign outages. A human checking accounts weekly — or a business owner logging in monthly — often misses the window.
What the Register Actually Shows
The Companies House public register shows your company name, company number, registered office address, officers, filing history, and accounts. Anyone can search it at find-and-update.company-information.service.gov.uk. If your companies house address is wrong or out of date, any business doing due diligence on you — including advertising platforms running verification checks — will find the discrepancy instantly.
For SMEs running Google Ads in 2026, where verification requirements have become more granular, having clean, consistent company information across all records is a baseline requirement, not an optional extra.
Why Address Admin Often Falls Through the Gap
In practice, registered address updates tend to get delayed because there's no immediate consequence. You move offices, you update your website, your business cards, your email footer — and the Companies House filing sits on the to-do list. Until Google sends a verification request, or a client queries your invoice address, the mismatch sits invisible.
The same pattern applies to Google Ads management. The account keeps running, costs accumulate, bids drift, and underperforming campaigns quietly eat budget. The review that would catch both problems — an account audit and a registered address check — never happens because neither feels urgent until it is.
For a broader view of how PPC ad management services work for SMEs, it's worth understanding what active account management actually involves day-to-day.
Keeping Your Records Clean: A Practical Approach
The most reliable approach is to treat your companies house address as the canonical business address and build outward from it. When you onboard with any advertising platform, use the registered address as your business address. If you have a separate trading address, use that for correspondence, but make sure the legal entity information reflects the registered office.
When you file accounts or annual confirmations with Companies House, take five minutes to check that the same address appears in your Google Ads account under business information, your Google Business Profile, and your VAT registration. This takes less time than resolving a verification hold.
Learn how Overtime actively monitors your Google Ads account to prevent campaign disruption
Overtime connects directly to your Google Ads account, adjusts bids, pauses campaigns that aren't performing, reallocates budget toward what's working, and sends you a plain-English summary of what it did and why. It won't file your Companies House forms — that's genuinely out of scope — but it will monitor for policy flags and verification notices that, left unattended, cause the exact kind of campaign disruption that an address mismatch can trigger.
If you're running Google Ads and you're not certain your companies house address matches the information in your account, check both today. It takes three minutes, and it removes one of the more obscure but genuinely disruptive failure points in paid search management.
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Frequently Asked Questions
What is a companies house address and is it mandatory?
A companies house address is the registered office address of a UK limited company, recorded publicly on the Companies House register. Yes, it is legally mandatory for all limited companies and LLPs incorporated in England, Wales, Scotland, or Northern Ireland.
How do I change my companies house address?
You file form AD01 online via the Companies House WebFiling service. There is no fee for online filing, and the change takes effect immediately, appearing on the public register within 24 hours. You should then update your address with HMRC, your bank, and any advertising platforms that hold your business details.
Can I use a PO box as my companies house address?
No. Companies House does not accept a PO box as a registered office address. The address must be a physical location capable of receiving legal correspondence. A c/o address at an accountant or solicitor is acceptable provided there is a real physical address behind it.
Why does my companies house address matter for Google Ads?
Google's advertiser verification process can cross-reference business addresses against public records. If the address in your Google Ads account doesn't match your registered address, verification requests may stall and campaigns can be restricted. Keeping all records consistent prevents this.
For more on this, see our guide: How to Contact Companies House: What SMEs Need.
For more on this, see our guide: Companies House Email Address: What SMEs Need to Know.
Should I use my home address as my companies house address?
You can, but it becomes publicly visible immediately and cannot be retroactively removed from historical records once filed. Many directors use a registered agent's address or their accountant's address to protect their home address from public disclosure.