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- Cil Construction Ltd
Company profile · Builders
Cil Construction Ltd
Cil Construction Ltd is a newly incorporated private limited company registered in Northampton, company number 16819900, one of 586 building contractors in Northampton. Its next accounts are due at Companies House on 30 July 2027, and its first CT600 is due at HMRC on 29 October 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 Cil Construction Ltd is registered
The registered office is in Northampton (NN1), in the West Northamptonshire local authority area, East Midlands. Show NN1 5NB on a map.
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What happens if Cil Construction 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 30 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Jul 2027 to 30 Aug 2027 | £150 |
| 1 to 3 months late | 31 Aug 2027 to 30 Oct 2027 | £375 |
| 3 to 6 months late | 31 Oct 2027 to 30 Jan 2028 | £750 |
| More than 6 months late | From 31 Jan 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
- 16819900
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 October 2025
- Registered office
- 5 Thursby Road, Northampton, NN1 5NB
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Northampton
Other active building contractors registered in Northampton.
- Ciobanu Solutions Ltd2026
- City Face Ltd2020
- Classix Design & Developments Limited1976
- CLM Building Services Limited2008
- Codrean Services Limited2019
- Codru Ltd2024
- Coleman Build (Northampton) Ltd2016
- Collingtree Carpentry Ltd2024
All building contractors in Northampton · All trades in Northampton · Builders across the UK
Frequently asked questions
When are Cil Construction Ltd's accounts due?
Cil Construction Ltd's next accounts are due at Companies House by 30 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Cil Construction 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 29 October 2026, due by 29 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cil Construction Ltd still trading?
Cil Construction 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 Cil Construction Ltd do?
Cil Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Cil Construction Ltd?
Cil Construction Ltd was incorporated on 30 October 2025, less than a year ago.
What is the penalty if Cil Construction 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 Cil Construction 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.