- Companies
- Specialist contractors
- Southall
- Hydro Plant Limited
Hydro Plant Limited
- Company number
- 01706967
- Incorporated
- 16 Mar 198343 years trading
- Registered office
- 4 the Lawn, Osterley Lane, Southall, Middx, UB2 4LB
- Nature of business
- Other specialised construction activities n.e.c.
Hydro Plant Limited is a 43-year-old private limited company registered in Southall, company number 01706967, one of 48 specialist construction companies in Southall. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £40K (-2%) on the year before, to £1.9M.
- Current assets of £1.5M against £144K owed within a year: more than 10 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £1.9M | £1M | £1.5M | £144K | 3 |
| 31 Jul 2024 | £2M | £989K | £1.5M | £165K | 3 |
Where Hydro Plant Limited is registered
The registered office is in Southall (UB2), in the Ealing local authority area, London. Show UB2 4LB on a map.
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What happens if Hydro Plant 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 01706967
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 March 1983 (43 years ago)
- Registered office
- 4 the Lawn, Osterley Lane, Southall, Middx, UB2 4LB
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 31 December 2025
- Charges (mortgages)
- 0 outstanding of 2 registered
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Southall
Other active specialist construction companies registered in Southall.
- Ipal Construction Ltd2024
- Ismi IT Ltd2023
- Kat Maintenance & Construction Ltd2018
- Landmark Steel Fabrications Ltd2023
- LCC General Building Ltd2021
- Levelin Group Ltd2024
- London Damp Specialists Ltd2016
- London Epoxy Ltd2025
All specialist construction companies in Southall · All trades in Southall · Specialist contractors across the UK
Frequently asked questions
When are Hydro Plant Limited's accounts due?
Hydro Plant Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Hydro Plant Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Hydro Plant Limited still trading?
Hydro Plant 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 Hydro Plant Limited do?
Hydro Plant Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Hydro Plant Limited?
Hydro Plant Limited was incorporated on 16 March 1983, 43 years ago.
What is the penalty if Hydro Plant 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 Hydro Plant 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.