- Companies
- Specialist contractors
- London
- Sienko Construction Ltd
Sienko Construction Ltd
- Company number
- 14477304
- Incorporated
- 10 Nov 20223 years trading
- Registered office
- 101 Butchers Road, London, E16 1NE
- Nature of business
- Other specialised construction activities n.e.c.
Sienko Construction Ltd is a 3-year-old private limited company registered in London, company number 14477304, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £20 (-66.7%) on the year before, to £10.
- 1 employee on average during the year.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £10 | £10 | 1 | ||
| 30 Nov 2024 | £30 | £30 | 1 | ||
| 30 Nov 2023 | £10 | £10 | 0 |
Where Sienko Construction Ltd is registered
The registered office is in London (E16), in the Newham local authority area, London. Show E16 1NE on a map.
Other trade companies in E16
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- Ramatu Seafood Bowl LtdProperty developers
- RM Construction Services LtdBuilders
- Master Flat Roofing LtdFinishing trades
- Syx LimitedBuilders
- Vidasmarius LtdInstallers
- Febaco LtdMotor traders
- Vazgo LtdPainters and decorators
Also registered at this address
2 other companies use the same registered office as Sienko Construction Ltd.
- Roxy Group LimitedJoiners and carpenters
- Timbad LtdSpecialist contractors
What happens if Sienko 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 14477304
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 November 2022 (3 years ago)
- Registered office
- 101 Butchers Road, London, E16 1NE
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 23 October 2025
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 London
Other active specialist construction companies registered in London.
- Sigma MD Limited2003
- Signature Inventories Limited2010
- Signature London Construction Limited2019
- Signature London Group Limited2019
- Sik Group Ltd2025
- Siko (UK) Limited2014
- Sil Builder Limited2026
- Silk Route Import & Export Ltd2021
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Sienko Construction Ltd's accounts due?
Sienko Construction Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Sienko Construction Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Sienko Construction Ltd still trading?
Sienko 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 Sienko Construction Ltd do?
Sienko Construction Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Sienko Construction Ltd?
Sienko Construction Ltd was incorporated on 10 November 2022, 3 years ago.
What is the penalty if Sienko 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 Sienko 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.