Which companies are registered at your address?
Enter any UK address and instantly see every company on Companies House using it as their registered office. Used by accountants, solicitors, homeowners, and business owners across the UK.
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How to check which companies are registered at your address
Enter your address above
Type your full UK address or postcode into the search box at the top of this page. The tool supports Google Places autocomplete, so start typing and select your address from the dropdown for the most accurate results. You can search any UK address — your office address, a client's premises, a residential property, or any other location.
We search Companies House instantly
The tool queries the live Companies House public register in real time. Companies House holds records for all UK limited companies, limited liability partnerships, and other registered entities. Every company must maintain an up-to-date registered office address on the register, so the results reflect the current state of the register at the moment you search.
See every company registered there
Your results show all companies currently listed at that address on the Companies House register — both active companies and dissolved ones whose last registered address was there. You can filter by status (active only, dissolved only, or all), and download the full list as a CSV sent to your inbox. Each result shows the company name, company number, registered address, and current status.
Take action if you spot anything unexpected
If you recognise all the companies, you're done. If you spot names you don't recognise, use the steps below to investigate. You can contact the directors listed on Companies House, ask them to update their registered address, or file a formal dispute using an RP07 form if they're unresponsive.
Understanding the problem
Why companies get registered at your address without permission
Companies House does not verify that the person filing a company registration has permission to use a given address as the registered office. Any director can enter any UK address when incorporating a company — and the register is updated immediately. This creates four common scenarios where your address ends up on the register without your knowledge or consent.
Former tenants or clients who haven't updated their address
This is the most common scenario. A client moves to a different accountant but forgets — or delays — updating their registered address. Months or years later, their company is still showing your address on Companies House. HMRC and Companies House correspondence continues to arrive at your office for a company you no longer act for.
Company formation agents using generic addresses
Some online company formation services use a pool of professional addresses — sometimes without proper authorisation from the occupiers. If your address has been used this way, you may find multiple companies registered there that have no connection to your firm whatsoever.
Clients forming new companies without telling you
An existing client incorporates a new subsidiary or related company and uses your address as the registered office, assuming your existing arrangement covers all their entities. Without a formal registered office service agreement for each company, you end up processing mail for a company you didn't know existed.
Fraudulent or suspicious registrations
In some cases, bad actors register companies at professional addresses — particularly accountancy firms — to lend an air of legitimacy to an entity being set up for fraudulent purposes. A company registered at a reputable firm's address looks more credible to potential creditors and counterparties. If you suspect this is happening, report it to Action Fraud and contact Companies House directly.
Not sure if any of these apply to your address? Run the free lookup above and see what's on the register right now.
Taking action
What to do if an unknown company is registered at your address
Finding an unfamiliar company on the register at your address is not uncommon, but it does require action. Here's what to do, in order.
Check your client records
Before assuming the worst, cross-reference the company name and number against your client list, engagement letters, and CRM. It may be a recently incorporated entity for an existing client, a company whose name has changed, or a business you acted for briefly and then disengaged from.
Contact the company's directors
Companies House lists the names and (where provided) service addresses of all directors. Contact them directly to explain that their company is registered at your address and ask them to update their registered office. Most cases are resolved at this stage — the director simply forgot to update the address when they changed accountant.
File an RP07 form if the company is unresponsive
If the company's directors do not respond or refuse to act, you can file an RP07 form (Removal of a registered office address) directly with Companies House. This is a formal dispute mechanism under section 1097A of the Companies Act 2006. Companies House will write to the company's officers requiring them to nominate a new registered office address. If they cannot, Companies House may change the address to a default location at its own offices.
Download the RP07 form from GOV.UK →Report suspicious registrations
If you believe a company has been registered at your address with fraudulent intent — to deceive creditors, HMRC, or other parties — report it to Action Fraud and notify Companies House's Intelligence team. Also consider whether this triggers any AML reporting obligations under the Proceeds of Crime Act 2002, particularly if you are a supervised entity.
For more detail on the RP07 process
We've written a full step-by-step guide to removing a company from your address on Companies House, including how to complete the RP07 form and what to expect from the process.
Read: How to remove a company from your address →For accountants and solicitors
Monitoring your registered office address: a professional obligation
If your firm provides registered office services to clients, the question of which companies are at your address is not just administrative — it is a compliance matter and a commercial one.
The AML compliance angle. As a supervised accountancy or legal practice, your supervisory body — whether HMRC, ICAEW, ACCA, SRA, or another recognised body — expects you to know who your registered office clients are and to have appropriate due diligence in place for each of them. A company registered at your address that has no engagement letter and no AML file is a compliance gap. Regular address monitoring closes that gap by ensuring you know about every company on the register at your address before their first piece of post arrives.
The commercial opportunity. If companies are using your address without a formal registered office service agreement, you are providing a valuable service for free. Identifying these companies is the first step to bringing them onto a proper arrangement — either a service agreement or a polite request to update their address. Either way, the address lookup tool tells you who they are.
Reputational risk. A company registered at your firm's address is associated with your firm in the public register. If that company is involved in misconduct — late filings, regulatory breaches, or worse — your address appears in those records. Regular monitoring lets you identify and address these situations before they become a problem.
The registered office services revenue stream. For practices looking to formalise and grow their registered office service offering, knowing exactly how many companies are at your address is the starting point. Our lookup tool gives you that number instantly. ComplyPost's paid tiers then handle the ongoing monitoring automatically, with alerts when new companies appear at your address.
Recommended frequency
How often should you check which companies are at your address?
Homeowners
Once or twice a year
Check if any companies have been fraudulently registered at your home address.
Business owners
Quarterly
Verify no former tenants or unknown entities are using your trading address.
Accountants & solicitors
Monthly (automated)
Maintain AML compliance, track new clients, and spot unauthorised registrations immediately.
ComplyPost automates address monitoring for professional firms — nightly checks against the Companies House register with instant alerts when anything changes. Start free
Automate your registered office mail
Found companies at your address? ComplyPost processes their mail automatically — scan, classify, and deliver to clients in minutes.
Frequently asked questions
About registered office addresses, Companies House lookups, and what to do when something looks wrong.
How do I look up a business by address in the UK?
Use the free ComplyPost address lookup above. Enter any UK address or postcode and it returns every company registered at that address on Companies House — active and dissolved — in seconds. No signup, no payment. The results come directly from the Companies House public register.
How do I find out which companies are registered at my address?
Enter your address in the lookup tool above. It searches Companies House records and shows every company currently using that address as their registered office. It's free and instant — no signup or login needed.
What do I do if someone has registered a company at my address?
First, check whether it's a former client, a former tenant, or a related company you'd forgotten about. If it's genuinely unknown, contact the directors listed on Companies House and ask them to update the registered address within 14 days. If they don't respond, file an RP07 form with Companies House to formally dispute the use of your address under section 1097A of the Companies Act 2006. If you suspect fraud, also report it to Action Fraud.
How do I remove a business from my address on Companies House?
To remove a business from your address on Companies House: (1) try contacting the directors and asking them to file an AD01 change of registered office — this resolves most cases within days; (2) if they don't cooperate, download the RP07 form from GOV.UK and submit it to Companies House; (3) Companies House will write to the company, and if no valid alternative address is provided within 28 days, the registered office is changed to a default address in Cardiff. The whole process typically takes 6–12 weeks.
What is an RP07?
An RP07 is the Companies House form used to dispute a company's registered office address when it is being used without the occupier's permission. It is filed under section 1097A of the Companies Act 2006. Anyone who occupies the disputed address can submit one. If Companies House accepts the application and the company fails to provide a valid alternative address, the registered office is changed to a default Companies House address — a public signal that the original use was unauthorised.
Can a company register at my address without my permission?
Yes. Companies House does not verify whether the person filing has permission to use an address as a registered office. This means companies can register your address without your knowledge or consent. That's why regular checks are important — you may be receiving statutory mail for companies you've never heard of.
What should I do if unknown companies are registered at my address?
First, check if they're former clients or companies you recognise. If they're genuinely unknown, contact the directors listed on Companies House to ask them to update their registered address. If the company is unresponsive or appears fraudulent, you can file an RP07 form with Companies House to dispute the use of your address as a registered office.
What is an RP07 form and when should I use it?
An RP07 is a Companies House form that allows a person or firm to dispute the use of their address as a registered office. You use it when a company is registered at your address without your consent and the company has not responded to your request to change it. Companies House will then write to the company's officers and, if no valid address is provided, may take action to remove the entry.
Is it illegal to register a company at an address without permission?
It is not straightforwardly illegal under UK company law for a director to register a company at an address they do not own or occupy, provided Companies House requirements are met. However, using an address dishonestly — for example, to deceive creditors or regulators — can constitute fraud. If you suspect fraudulent intent, you should report it to Action Fraud and contact Companies House directly.
How do I search Companies House by address or postcode?
The quickest way is to use this free tool above — enter your address and see results instantly. Alternatively, you can use the Companies House Advanced Search at find-and-update.company-information.service.gov.uk and filter by registered address. Our tool is faster and specifically designed for this type of address-based search.
Is this Companies House lookup free?
Yes, completely free. The tool searches the Companies House public register, which is freely available. We've built a faster, cleaner interface specifically for this purpose — no login, no payment, no data sold.
How often should I check which companies are at my address?
If you provide registered office services professionally, we recommend checking at least monthly. Companies can register or change their address at any time, and you have a duty of care to handle statutory correspondence promptly. If you're a homeowner or business owner checking your residential or commercial address, a quarterly check is sufficient. ComplyPost automates this monitoring for paying customers.
What is a registered office address?
A registered office address is the official legal address of a UK company as recorded at Companies House. All statutory correspondence — from HMRC, Companies House, courts, and other government bodies — is sent to this address. Every UK limited company must have one, and it must be a physical UK address (not a PO Box).
Can I use this to find companies registered at any UK address?
Yes. You can search any UK address — your office, a client's address, a residential property, or any other address. The tool returns all companies currently registered there according to Companies House records.
How does ComplyPost help beyond the free lookup?
ComplyPost automates the entire registered office mail workflow for accountancy practices. Bulk scan incoming post, AI classifies each letter, matches it to the right client, and delivers it by email — all in minutes. The address lookup and monitoring is built into the dashboard so you always know which companies are at your address, and you receive alerts when anything changes. Plans start free with 100 pages per month.
What is section 1097A of the Companies Act 2006?
Section 1097A gives individuals and firms the right to apply to Companies House to have their address removed as a registered office when it has been used without authorisation. If Companies House accepts your application, it will write to the company's registered officers. If the company cannot provide a suitable alternative address, Companies House can change the registered office to a default address at Companies House itself.
Further reading
Related guides
More detail on specific aspects of registered office addresses and Companies House.
Need help managing registered office mail?
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