- Companies
- Builders
- Southampton
- Hydrotech Pools Ltd
Hydrotech Pools Ltd
- Company number
- 13115326
- Incorporated
- 6 Jan 20215 years trading
- Registered office
- 33 Gemini Close, Southampton, SO16 8BG
- Nature of business
- Construction of commercial buildings
Hydrotech Pools Ltd is a 5-year-old private limited company registered in Southampton, company number 13115326, one of 491 building contractors in Southampton. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £13K (-100%) on the year before, to £0.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £8,432 against £11K owed within a year: 0.8 times cover.
- 1 employee on average, up from 0 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Jan 2025 | £0 | £8,432 | £11K | 1 | |
| 31 Jan 2024 | £13K | £14K | £6,219 | 0 | |
| 31 Jan 2023 | £12K | £13K | £7,758 | 0 | |
| 31 Jan 2022 | £2,799 | £7,286 | £11K | 1 |
Where Hydrotech Pools Ltd is registered
The registered office is in Southampton (SO16), in the Southampton local authority area, South East. Show SO16 8BG on a map.
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What happens if Hydrotech Pools 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 13115326
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 January 2021 (5 years ago)
- Registered office
- 33 Gemini Close, Southampton, SO16 8BG
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 30 January 2026
- Previous names
- Sigma Design & Installation Ltd (until 23 Jul 2024)
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Southampton
Other active building contractors registered in Southampton.
- Ibcon Construction Limited1983
- Ibex Homes Limited2007
- Ibrar Ltd2025
- Imperial Residential Investments Limited2024
- Inex Construction Limited2001
- Iron Edge Solutions Limited2025
- J Parry & Sons General Builder Ltd2014
- J Taylor Build Ltd2022
All building contractors in Southampton · All trades in Southampton · Builders across the UK
Frequently asked questions
When are Hydrotech Pools Ltd's accounts due?
Hydrotech Pools Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Hydrotech Pools Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Hydrotech Pools Ltd still trading?
Hydrotech Pools 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 Hydrotech Pools Ltd do?
Hydrotech Pools Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is Hydrotech Pools Ltd?
Hydrotech Pools Ltd was incorporated on 6 January 2021, 5 years ago.
What is the penalty if Hydrotech Pools 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 Hydrotech Pools 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.