- Companies
- Civil engineering
- Stockton-on-Tees
- Commplex Utility Services Limited
Commplex Utility Services Limited
- Company number
- 13461235
- Incorporated
- 17 Jun 20215 years trading
- Registered office
- Unit 12 Primrose Hill Industrial Estate, Orde Wingate Way, Stockton-on-Tees, County Durham, TS19 0GA
- Nature of business
- Construction of utility projects for electricity and telecommunications
Commplex Utility Services Limited is a 5-year-old private limited company registered in Stockton-on-Tees, company number 13461235, one of 58 civil engineering contractors in Stockton-on-Tees. 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 up £39K (+319.2%) on the year before, to £51K.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £282K against £206K owed within a year: 1.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £51K | £17K | £282K | £206K | 1 |
| 30 Nov 2024 | £12K | £9,355 | £44K | £6,745 | 1 |
| 30 Nov 2023 | -£501 | £11 | £12 | £0 | 1 |
| 30 Nov 2022 | -£401 | £112 | £360 | 1 |
Where Commplex Utility Services Limited is registered
The registered office is in Stockton-on-Tees (TS19), in the Stockton-on-Tees local authority area, North East. Show TS19 0GA on a map.
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What happens if Commplex Utility Services 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 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
- 13461235
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 June 2021 (5 years ago)
- Registered office
- Unit 12 Primrose Hill Industrial Estate, Orde Wingate Way, Stockton-on-Tees, County Durham, TS19 0GA
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 20 May 2025
- Previous names
- Commplex Network Services 2 Limited (until 24 Nov 2021)
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 Stockton-on-Tees
Other active civil engineering contractors registered in Stockton-on-Tees.
- CWH Construction Ltd2021
- D A Bunce Civil Engineering Ltd2003
- Dmaffey Ltd2024
- Dsus Ltd2025
- E M P Solutions (Teesside) Ltd2015
- E. V. A. Project Management Ltd2020
- Easingwold Engineering Solutions Limited2016
- Ejm Teesside Ltd2025
All civil engineering contractors in Stockton-on-Tees · All trades in Stockton-on-Tees · Civil engineering across the UK
Frequently asked questions
When are Commplex Utility Services Limited's accounts due?
Commplex Utility Services Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Commplex Utility Services Limited'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 Commplex Utility Services Limited still trading?
Commplex Utility Services Limited is listed as active on the Companies House register (checked 13 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 Commplex Utility Services Limited do?
Commplex Utility Services Limited is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Commplex Utility Services Limited?
Commplex Utility Services Limited was incorporated on 17 June 2021, 5 years ago.
What is the penalty if Commplex Utility Services 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 Commplex Utility Services Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.