- Companies
- Specialist contractors
- Knebworth
- Cjexec Ltd
Cjexec Ltd
- Company number
- 16611745
- Incorporated
- 29 Jul 20251 year trading
- Registered office
- 29 Burnham Green Road, Datchworth, Knebworth, Hertfordshire, SG3 6SE
- Nature of business
- Other specialised construction activities n.e.c.; Information technology consultancy activities; Management consultancy activities other than financial management; Other professional, scientific and technical activities n.e.c.
Cjexec Ltd is a 1-year-old private limited company registered in Knebworth, company number 16611745, one of 8 specialist construction companies in Knebworth. Its next accounts are due at Companies House on 29 April 2027, and its first CT600 is due at HMRC on 28 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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Who runs and owns Cjexec Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| C*** J*** | Director | Jul 2025 |
| C*** J*** | Secretary | Jul 2025 |
Person with significant control
Where Cjexec Ltd is registered
The registered office is in Knebworth (SG3), in the East Hertfordshire local authority area, East of England. Show SG3 6SE on a map.
Other trade companies in SG3
- Unityrock Services LtdBuilders
- SH Dev 1 LtdProperty developers
- DJ Monk LimitedMechanics and garages
- BCC Construction LtdBuilders
- Knebworth Refinishing LimitedMechanics and garages
- CC Brickwork LtdProperty developers
- KGS Landscaping & Ground Works LtdLandscapers and gardeners
- Cube Installations Co. LtdFloor and wall tilers
What happens if Cjexec 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 29 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Apr 2027 to 29 May 2027 | £150 |
| 1 to 3 months late | 30 May 2027 to 29 Jul 2027 | £375 |
| 3 to 6 months late | 30 Jul 2027 to 29 Oct 2027 | £750 |
| More than 6 months late | From 30 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
- 16611745
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 July 2025 (1 year ago)
- Registered office
- 29 Burnham Green Road, Datchworth, Knebworth, Hertfordshire, SG3 6SE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Information technology consultancy activities (SIC 62020)
Management consultancy activities other than financial management (SIC 70229)
Other professional, scientific and technical activities n.e.c. (SIC 74909) - Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 3 July 2026
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 Knebworth
Other active specialist construction companies registered in Knebworth.
- PJC Smith Limited2013
- Ramsey Stone Consultants Ltd2017
- S.B.S. Building Consultants Limited1979
- Stan Limited2002
- Auto Door Services Limited2002
- C&G Bathroom Solutions Limited2016
- Chronos Expert Services Limited2025
All specialist construction companies in Knebworth · All trades in Knebworth · Specialist contractors across the UK
Frequently asked questions
When are Cjexec Ltd's accounts due?
Cjexec Ltd's next accounts are due at Companies House by 29 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Cjexec 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 28 July 2026, due by 28 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 Cjexec Ltd still trading?
Cjexec 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 Cjexec Ltd do?
Cjexec Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Information technology consultancy activities (SIC 62020); Management consultancy activities other than financial management (SIC 70229); Other professional, scientific and technical activities n.e.c. (SIC 74909).
How old is Cjexec Ltd?
Cjexec Ltd was incorporated on 29 July 2025, 1 year ago.
Who runs Cjexec Ltd?
Cjexec Ltd has 1 active director, the longest-serving appointed in Jul 2025. Their names and service addresses are on the Companies House register.
Who owns Cjexec Ltd?
One person or company has significant control of Cjexec Ltd: an individual (owns 75% or more of the shares).
What is the penalty if Cjexec 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 Cjexec 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.