- Companies
- Specialist contractors
- London
- Rockcon Ltd
Rockcon Ltd
- Company number
- 09293863
- Incorporated
- 4 Nov 201411 years trading
- Registered office
- 17 Pennine Parade, Pennine Drive, London, NW2 1NT
- Nature of business
- Other specialised construction activities n.e.c.; Management consultancy activities other than financial management
Rockcon Ltd is a 11-year-old private limited company registered in London, company number 09293863, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £14K on the year before, to £14K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £106K against £95K owed within a year: 1.1 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £14K | £106K | £95K | 0 | |
| 31 Oct 2024 | £150 | £98K | £102K | 2 | |
| 31 Oct 2023 | £391 | £82K | £88K | 2 | |
| 31 Oct 2022 | £3,509 | £55K | £59K | 2 | |
| 31 Oct 2021 | £3,540 | £26K | £33K | 3 | |
| 31 Oct 2020 | £18K | £50K | £46K | 3 | |
| 31 Oct 2019 | £16K | £38K | £26K | 2 | |
| 31 Oct 2018 | -£22K | -£30K | £12K | 2 | |
| 31 Oct 2017 | -£24K | -£33K | £14K | ||
| 31 Oct 2016 | £10K | £21K | £23K | £12K |
Where Rockcon Ltd is registered
The registered office is in London (NW2), in the Barnet local authority area, London. Show NW2 1NT on a map.
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Shared registered office
134 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Rockcon 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 31 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 09293863
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 2014 (11 years ago)
- Registered office
- 17 Pennine Parade, Pennine Drive, London, NW2 1NT
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Management consultancy activities other than financial management (SIC 70229) - Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 27 April 2026
- Previous names
- Rock Con Ltd (until 4 Nov 2014)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Rocket Maintenance Ltd2024
- Rogers Site Engineering Services Limited2005
- Rohiv Limited2019
- Rokgh Company Ltd2021
- Roklyn Ltd2025
- Rom Builders Ltd2020
- Roman London Refurbishment Ltd2026
- Romulus Contract Services Ltd2024
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Rockcon Ltd's accounts due?
Rockcon Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Rockcon Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Rockcon Ltd still trading?
Rockcon Ltd 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 Rockcon Ltd do?
Rockcon Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Management consultancy activities other than financial management (SIC 70229).
How old is Rockcon Ltd?
Rockcon Ltd was incorporated on 4 November 2014, 11 years ago.
What is the penalty if Rockcon 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 Rockcon Ltd 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.