- Companies
- Specialist contractors
- Northampton
- Cil Bros Construction Limited
Cil Bros Construction Limited
- Company number
- 17200873
- Incorporated
- 5 May 2026
- Registered office
- 24 Sheerwater Drive, Northampton, NN3 5HU
- Nature of business
- Other specialised construction activities n.e.c.
Cil Bros Construction Limited is a newly incorporated private limited company registered in Northampton, company number 17200873, one of 258 specialist construction companies in Northampton. Its next accounts are due at Companies House on 5 February 2028, and its first CT600 is due at HMRC on 4 May 2028.
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 Bros Construction Limited is registered
The registered office is in Northampton (NN3), in the West Northamptonshire local authority area, East Midlands. Show NN3 5HU on a map.
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What happens if Cil Bros Construction Limited 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 5 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Feb 2028 to 5 Mar 2028 | £150 |
| 1 to 3 months late | 6 Mar 2028 to 5 May 2028 | £375 |
| 3 to 6 months late | 6 May 2028 to 5 Aug 2028 | £750 |
| More than 6 months late | From 6 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2029 | 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
- 17200873
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 May 2026
- Registered office
- 24 Sheerwater Drive, Northampton, NN3 5HU
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
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 Northampton
Other active specialist construction companies registered in Northampton.
- Cma Constuction Group Ltd2026
- Cmi Drylining Ltd2019
- Combisafe UK Limited2026
- Comm Solve Solutions Limited2015
- Convert Build & Maintain Limited2025
- Craft Lux Ltd2019
- Cretan Construction Services Ltd2026
- Cropper Hire Ltd2023
All specialist construction companies in Northampton · All trades in Northampton · Specialist contractors across the UK
Frequently asked questions
When are Cil Bros Construction Limited's accounts due?
Cil Bros Construction Limited's next accounts are due at Companies House by 5 February 2028 (in 480 days), covering the period to 31 May 2027.
When is Cil Bros Construction Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 4 May 2027, due by 4 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Cil Bros Construction Limited still trading?
Cil Bros Construction Limited 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 Bros Construction Limited do?
Cil Bros Construction Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Cil Bros Construction Limited?
Cil Bros Construction Limited was incorporated on 5 May 2026, less than a year ago.
What is the penalty if Cil Bros Construction Limited 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 Bros Construction Limited 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.