- Companies
- Specialist contractors
- Blyth
- Obsidian6 Ltd
Obsidian6 Ltd
- Company number
- 17182194
- Incorporated
- 27 Apr 2026
- Registered office
- 20 Swinburne Street, Blyth, NE24 4SP
- Nature of business
- Other specialised construction activities n.e.c.
Obsidian6 Ltd is a newly incorporated private limited company registered in Blyth, company number 17182194, one of 12 specialist construction companies in Blyth. Its next accounts are due at Companies House on 27 January 2028, and its first CT600 is due at HMRC on 26 April 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 Obsidian6 Ltd is registered
The registered office is in Blyth (NE24), in the Northumberland local authority area, North East. Show NE24 4SP on a map.
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What happens if Obsidian6 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 27 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Jan 2028 to 27 Feb 2028 | £150 |
| 1 to 3 months late | 28 Feb 2028 to 27 Apr 2028 | £375 |
| 3 to 6 months late | 28 Apr 2028 to 27 Jul 2028 | £750 |
| More than 6 months late | From 28 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 17182194
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 April 2026
- Registered office
- 20 Swinburne Street, Blyth, NE24 4SP
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 April (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 Blyth
Other active specialist construction companies registered in Blyth.
- Zed Developments Ltd2023
- Art of Stone(Ne) Limited2023
- Baku Civil Engineering Limited2025
- CW Consultancy (Worksop) Ltd2020
- D & M Fencing Limited2001
- Dameon Craven Safe Access Ne Ltd2026
- Deckwise Ne Ltd2026
- Enshore Subsea Rapidscan Limited2025
All specialist construction companies in Blyth · All trades in Blyth · Specialist contractors across the UK
Frequently asked questions
When are Obsidian6 Ltd's accounts due?
Obsidian6 Ltd's next accounts are due at Companies House by 27 January 2028 (in 471 days), covering the period to 30 April 2027.
When is Obsidian6 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 26 April 2027, due by 26 April 2028, and one for the period to 30 April 2027, due by 30 April 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Obsidian6 Ltd still trading?
Obsidian6 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 Obsidian6 Ltd do?
Obsidian6 Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Obsidian6 Ltd?
Obsidian6 Ltd was incorporated on 27 April 2026, less than a year ago.
What is the penalty if Obsidian6 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 Obsidian6 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.