- Companies
- Civil engineering
- London
- Cmackg Ltd
Cmackg Ltd
- Company number
- 16605024
- Incorporated
- 24 Jul 20251 year trading
- Registered office
- 155A Bramley Road, London, N14 4XB
- Nature of business
- Construction of other civil engineering projects n.e.c.
Cmackg Ltd is a 1-year-old private limited company registered in London, company number 16605024, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 24 April 2027, and its first CT600 is due at HMRC on 23 July 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 Cmackg Ltd is registered
The registered office is in London (N14), in the Enfield local authority area, London. Show N14 4XB on a map.
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What happens if Cmackg 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 24 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 25 Apr 2027 to 24 May 2027 | £150 |
| 1 to 3 months late | 25 May 2027 to 24 Jul 2027 | £375 |
| 3 to 6 months late | 25 Jul 2027 to 24 Oct 2027 | £750 |
| More than 6 months late | From 25 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 16605024
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 July 2025 (1 year ago)
- Registered office
- 155A Bramley Road, London, N14 4XB
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 2 August 2026
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.
- CMB Logistics and Traffic Management Ltd2025
- Cni Services Limited2023
- CNMS Construction Ltd2021
- CNR International Ltd2020
- Cobaltt Construction Ltd2019
- Cobomech UK Ltd2026
- Cohere Network and Engineering Solution Limited2022
- Community Energy Scheme Northampton Limited2026
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Cmackg Ltd's accounts due?
Cmackg Ltd's next accounts are due at Companies House by 24 April 2027 (in 194 days), covering the period to 31 July 2026.
When is Cmackg 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 23 July 2026, due by 23 July 2027, and one for the period to 31 July 2026, due by 31 July 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cmackg Ltd still trading?
Cmackg 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 Cmackg Ltd do?
Cmackg Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Cmackg Ltd?
Cmackg Ltd was incorporated on 24 July 2025, 1 year ago.
What is the penalty if Cmackg 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 Cmackg 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.