- Companies
- Civil engineering
- Houghton le Spring
- CS Fibre Optics Ltd
CS Fibre Optics Ltd
- Company number
- 17326961
- Incorporated
- 8 Jul 2026
- Registered office
- 95 Houghton Road, Houghton le Spring, DH5 9PJ
- Nature of business
- Construction of utility projects for electricity and telecommunications
CS Fibre Optics Ltd is a newly incorporated private limited company registered in Houghton le Spring, company number 17326961, one of 12 civil engineering contractors in Houghton le Spring. Its next accounts are due at Companies House on 8 April 2028, and its first CT600 is due at HMRC on 7 July 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 CS Fibre Optics Ltd is registered
The registered office is in Houghton le Spring (DH5), in the Sunderland local authority area, North East. Show DH5 9PJ on a map.
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What happens if CS Fibre Optics 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 8 April 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 9 Apr 2028 to 8 May 2028 | £150 |
| 1 to 3 months late | 9 May 2028 to 8 Jul 2028 | £375 |
| 3 to 6 months late | 9 Jul 2028 to 8 Oct 2028 | £750 |
| More than 6 months late | From 9 Oct 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2028 | £200 |
| 3 months late | 31 Oct 2028 | another £200 |
| 6 months late | 31 Jan 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 17326961
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 July 2026
- Registered office
- 95 Houghton Road, Houghton le Spring, DH5 9PJ
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- No accounts filed yet
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 Houghton le Spring
Other active civil engineering contractors registered in Houghton le Spring.
- DH Project Solutions Ltd2024
- Evalsamjay Limited2020
- Luke Fabrication Services Ltd2026
- My Civil Engineers Ltd2021
- R Wilson Groundworks Limited2019
- RJC Groundworks Limited2017
- SMC Wind Turbine Tech Ltd2025
- Traffic Management Ne Ltd2022
All civil engineering contractors in Houghton le Spring · All trades in Houghton le Spring · Civil engineering across the UK
Frequently asked questions
When are CS Fibre Optics Ltd's accounts due?
CS Fibre Optics Ltd's next accounts are due at Companies House by 8 April 2028 (in 543 days), covering the period to 31 July 2027.
When is CS Fibre Optics 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 7 July 2027, due by 7 July 2028, and one for the period to 31 July 2027, due by 31 July 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is CS Fibre Optics Ltd still trading?
CS Fibre Optics 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 CS Fibre Optics Ltd do?
CS Fibre Optics Ltd is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is CS Fibre Optics Ltd?
CS Fibre Optics Ltd was incorporated on 8 July 2026, less than a year ago.
What is the penalty if CS Fibre Optics 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 CS Fibre Optics 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.