- Companies
- Civil engineering
- Worthing
- System Aqua Ltd
System Aqua Ltd
- Company number
- 11052151
- Incorporated
- 7 Nov 20178 years trading
- Registered office
- Unit 4 Dominion Way, Dominion Way West, Worthing, West Sussex, BN14 8NT
- Nature of business
- Construction of water projects
System Aqua Ltd is a 8-year-old private limited company registered in Worthing, company number 11052151, one of 21 civil engineering contractors in Worthing. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £9,390 (-17%) on the year before, to £46K.
- Net assets rose in 4 of 7 year-on-year comparisons on record.
- Current assets of £108K against £150K owed within a year: 0.7 times cover.
- 4 employees on average, up from 3 the year before.
- Balance sheets on record for 8 years, 2019 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £46K | £96K | £108K | £150K | 4 |
| 31 Mar 2025 | £55K | £82K | £91K | £74K | 3 |
| 31 Mar 2024 | £53K | £163K | £184K | £170K | 3 |
| 31 Mar 2023 | £39K | £33K | £52K | £28K | 3 |
| 31 Mar 2022 | £4,639 | £41K | £55K | £49K | 2 |
| 31 Mar 2021 | £23K | £48K | £84K | £40K | 2 |
| 31 Mar 2020 | £47K | £37K | £95K | £49K | 2 |
| 31 Mar 2019 | £41K | £56K | £68K | £33K | 1 |
Where System Aqua Ltd is registered
The registered office is in Worthing (BN14), in the Worthing local authority area, South East. Show BN14 8NT on a map.
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- Southern Roof Repairs LtdRoofers
- Onspot Plumbing & Heating LtdPlumbers and heating engineers
- The Chisnall Group LtdBuilders
- GB Steeplejacks LtdSpecialist contractors
- Ty Cleaning Solutions LtdCleaning companies
- Boldbakers LimitedCleaning companies
- Our Property UK Solutions LtdProperty developers
What happens if System Aqua 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 11052151
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 November 2017 (8 years ago)
- Registered office
- Unit 4 Dominion Way, Dominion Way West, Worthing, West Sussex, BN14 8NT
- Nature of business
- Construction of water projects (SIC 42910)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 18 May 2026
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 Worthing
Other active civil engineering contractors registered in Worthing.
- The Loft Converter Sussex Ltd2026
- Utm Building Services Limited2011
- Visual Installations Services Limited2007
- Watertech Worldwide Limited2017
- Ajc Contractors (South East) Ltd2009
- Borngrade Ltd2010
- E B Digging Ltd2021
- East Worthing Site Services Limited2021
All civil engineering contractors in Worthing · All trades in Worthing · Civil engineering across the UK
Frequently asked questions
When are System Aqua Ltd's accounts due?
System Aqua Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is System Aqua Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is System Aqua Ltd still trading?
System Aqua 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 System Aqua Ltd do?
System Aqua Ltd is registered under Construction of water projects (SIC 42910).
How old is System Aqua Ltd?
System Aqua Ltd was incorporated on 7 November 2017, 8 years ago.
What is the penalty if System Aqua 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 System Aqua 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.