- Companies
- Installers
- London
- Atlas Firestopping Limited
Atlas Firestopping Limited
- Company number
- 17110537
- Incorporated
- 23 Mar 2026
- Registered office
- 34-35 Berwick Street, London, W1F 8RP
- Nature of business
- Other construction installation
Atlas Firestopping Limited is a newly incorporated private limited company registered in London, company number 17110537, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 23 December 2027, and its first CT600 is due at HMRC on 22 March 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Atlas Firestopping Limited is registered
The registered office is in London (W1F), in the Westminster local authority area, London. Show W1F 8RP on a map.
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What happens if Atlas Firestopping Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 23 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Dec 2027 to 23 Jan 2028 | £150 |
| 1 to 3 months late | 24 Jan 2028 to 23 Mar 2028 | £375 |
| 3 to 6 months late | 24 Mar 2028 to 23 Jun 2028 | £750 |
| More than 6 months late | From 24 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 17110537
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 March 2026
- Registered office
- 34-35 Berwick Street, London, W1F 8RP
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
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All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Atlas Firestopping Limited's accounts due?
Atlas Firestopping Limited's next accounts are due at Companies House by 23 December 2027 (in 436 days), covering the period to 31 March 2027.
When is Atlas Firestopping Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 22 March 2027, due by 22 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Atlas Firestopping Limited still trading?
Atlas Firestopping Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Atlas Firestopping Limited do?
Atlas Firestopping Limited is registered under Other construction installation (SIC 43290).
How old is Atlas Firestopping Limited?
Atlas Firestopping Limited was incorporated on 23 March 2026, less than a year ago.
What is the penalty if Atlas Firestopping Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Atlas Firestopping Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.