- Companies
- Specialist contractors
- London
- TST Construction Ltd
TST Construction Ltd
- Company number
- 12097866
- Incorporated
- 11 Jul 20197 years trading
- Registered office
- 6 Winchester Road, London, N9 9EB
- Nature of business
- Other specialised construction activities n.e.c.
TST Construction Ltd is a 7-year-old private limited company registered in London, company number 12097866, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 up £10K on the year before, to £11K.
- Net assets rose in 3 of 5 year-on-year comparisons on record.
- Current assets of £13K against £2,321 owed within a year: 5.5 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £11K | £13K | £2,321 | 2 | |
| 30 Jun 2024 | £841 | £2,465 | £1,624 | 1 | |
| 30 Jun 2023 | -£77 | £1,980 | £2,057 | 1 | |
| 30 Jun 2022 | £9,231 | £10K | £1,076 | 1 | |
| 30 Jun 2021 | £4,644 | £5,325 | £681 | 1 | |
| 30 Jun 2020 | £4,965 | £6,397 | £1,432 | 1 |
Where TST Construction Ltd is registered
The registered office is in London (N9), in the Enfield local authority area, London. Show N9 9EB on a map.
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What happens if TST 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 12097866
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 July 2019 (7 years ago)
- Registered office
- 6 Winchester Road, London, N9 9EB
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 10 July 2026
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.
- TT Build Ltd2021
- TTTK Construction Ltd2026
- Tu Golden Hills Ltd2023
- Tudor Rose Group Ltd2025
- Tufnell Maintenance & Renovations Ltd2024
- Tunad Limited2023
- Tunaj Decorating & Property Management Services Limited2023
- Tundja Ltd2019
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are TST Construction Ltd's accounts due?
TST Construction Ltd's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is TST Construction Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is TST Construction Ltd still trading?
TST 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 TST Construction Ltd do?
TST Construction Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is TST Construction Ltd?
TST Construction Ltd was incorporated on 11 July 2019, 7 years ago.
What is the penalty if TST 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 TST 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.