- Companies
- Civil engineering
- London
- Teejay and Sons Limited
Teejay and Sons Limited
- Company number
- 10388906
- Incorporated
- 22 Sep 201610 years trading
- Registered office
- 23 Redshank House, Avocet Close, London, SE1 5EN
- Nature of business
- Construction of railways and underground railways
Teejay and Sons Limited is a 10-year-old private limited company registered in London, company number 10388906, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £290 (+38.8%) on the year before, to £1,037.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £1,769 against £1,632 owed within a year: 1.1 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £1,037 | £1,769 | £1,632 | 3 | |
| 30 Sep 2024 | £747 | £2,705 | £3,058 | 3 | |
| 30 Sep 2023 | £125 | £9,409 | £3,084 | 3 | |
| 30 Sep 2022 | £820 | £6,515 | £2,195 | 3 | |
| 30 Sep 2021 | £362 | £2,180 | £1,818 | 3 | |
| 30 Sep 2020 | £138 | £2,244 | £1,306 | 3 | |
| 30 Sep 2019 | £74 | £1,803 | £1,729 | 3 | |
| 30 Sep 2018 | £1 | £2,939 | £1,838 | ||
| 30 Sep 2017 | -£768 | £726 |
Where Teejay and Sons Limited is registered
The registered office is in London (SE1), in the Southwark local authority area, London. Show SE1 5EN on a map.
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What happens if Teejay and Sons 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 10388906
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 September 2016 (10 years ago)
- Registered office
- 23 Redshank House, Avocet Close, London, SE1 5EN
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 21 September 2025
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 London
Other active civil engineering contractors registered in London.
- Teletron Environmental Engineering Ltd2021
- Temmy Enterprices Limited2015
- Teranet UK Ltd2012
- Terrabase Engineering Ltd2025
- Terracore Groundworks Ltd2026
- Teskaf Ltd2015
- Teznocorp Ltd2026
- TGC Engineering UK Ltd2025
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Teejay and Sons Limited's accounts due?
Teejay and Sons Limited's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Teejay and Sons Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Teejay and Sons Limited still trading?
Teejay and Sons Limited is listed as active on the Companies House register (checked 12 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 Teejay and Sons Limited do?
Teejay and Sons Limited is registered under Construction of railways and underground railways (SIC 42120).
How old is Teejay and Sons Limited?
Teejay and Sons Limited was incorporated on 22 September 2016, 10 years ago.
What is the penalty if Teejay and Sons 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 Teejay and Sons Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.