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- Sub-Tech Contracts Limited
Company profile · Civil engineering
Sub-Tech Contracts Limited
Sub-Tech Contracts Limited is a 18-year-old private limited company registered in Barking, company number 06512667, one of 39 civil engineering contractors in Barking. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 28 February 2025, as filed at Companies House.
Sub-Tech Contracts Limited over the years
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 £663K (+21%) on the year before, to £3.8M.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £3.5M against £268K owed within a year: more than 10 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 5 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £3.8M | £3M | £3.5M | £268K | 4 |
| 29 Feb 2024 | £3.2M | £2.7M | £3M | £254K | 4 |
| 28 Feb 2024 | £3.2M | £2.7M | £3M | £254K | 4 |
| 28 Feb 2023 | £1.4M | £1.3M | £2.2M | £951K | 4 |
| 28 Feb 2022 | £1.5M | £1.1M | £2.2M | £913K | 2 |
Where Sub-Tech Contracts Limited is registered
The registered office is in Barking (IG11), in the Barking and Dagenham local authority area, London. Show IG11 0HS on a map.
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Also registered at this address
1 other company uses the same registered office as Sub-Tech Contracts Limited.
- Cannon Tunnel & Civils LtdCivil engineering
What happens if Sub-Tech Contracts 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 06512667
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 February 2008 (18 years ago)
- Registered office
- 17-19 Thames Road, Barking, IG11 0HS
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Other business support service activities n.e.c. (SIC 82990) - Year end
- 29 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 25 March 2026
- Previous names
- Sub-Tech Contacts Limited (until 10 Mar 2008)
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 Barking
Other active civil engineering contractors registered in Barking.
- Tek Rail Ltd2021
- The Big Makers Ltd2025
- Universal Track Solutions Ltd2025
- Vision Design & Engineering Ltd2023
- Xilef Nextz Limited2024
- Yellowkenny Ltd2015
- Amimady Construction Company Limited2016
- Angels Resources & Supplies Ltd2020
All civil engineering contractors in Barking · All trades in Barking · Civil engineering across the UK
Frequently asked questions
When are Sub-Tech Contracts Limited's accounts due?
Sub-Tech Contracts Limited's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Sub-Tech Contracts Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Sub-Tech Contracts Limited still trading?
Sub-Tech Contracts Limited 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 Sub-Tech Contracts Limited do?
Sub-Tech Contracts Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Other business support service activities n.e.c. (SIC 82990).
How old is Sub-Tech Contracts Limited?
Sub-Tech Contracts Limited was incorporated on 25 February 2008, 18 years ago.
What is the penalty if Sub-Tech Contracts 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 Sub-Tech Contracts Limited 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.