- Companies
- Civil engineering
- London
- RCC21 Ltd
RCC21 Ltd
- Company number
- 16719332
- Incorporated
- 15 Sep 20251 year trading
- Registered office
- 89 Brent Park Road, London, NW4 3HW
- Nature of business
- Construction of bridges and tunnels
RCC21 Ltd is a 1-year-old private limited company registered in London, company number 16719332, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 15 June 2027, and its first CT600 is due at HMRC on 14 September 2027.
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 RCC21 Ltd is registered
The registered office is in London (NW4), in the Barnet local authority area, London. Show NW4 3HW on a map.
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What happens if RCC21 Ltd 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 15 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 16 Jun 2027 to 15 Jul 2027 | £150 |
| 1 to 3 months late | 16 Jul 2027 to 15 Sep 2027 | £375 |
| 3 to 6 months late | 16 Sep 2027 to 15 Dec 2027 | £750 |
| More than 6 months late | From 16 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 2028 | 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
- 16719332
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 September 2025 (1 year ago)
- Registered office
- 89 Brent Park Road, London, NW4 3HW
- Nature of business
- Construction of bridges and tunnels (SIC 42130)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- RCS Fixing Ltd2009
- Red Rail Supplies Ltd2025
- Redway Group Ltd2026
- Reggie K Company Limited2023
- Regusafe Engineering Limited2024
- Reid's Telecoms Ltd2024
- Renewable Power Cameroon Ltd2025
- Replace Utilities Ltd2024
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are RCC21 Ltd's accounts due?
RCC21 Ltd's next accounts are due at Companies House by 15 June 2027 (in 246 days), covering the period to 30 September 2026.
When is RCC21 Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 14 September 2026, due by 14 September 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is RCC21 Ltd still trading?
RCC21 Ltd is listed as active on the Companies House register (checked 12 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 RCC21 Ltd do?
RCC21 Ltd is registered under Construction of bridges and tunnels (SIC 42130).
How old is RCC21 Ltd?
RCC21 Ltd was incorporated on 15 September 2025, 1 year ago.
What is the penalty if RCC21 Ltd 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 RCC21 Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.