- Companies
- Plumbers and heating engineers
- Southampton
- Solent Water Treatment Ltd
Solent Water Treatment Ltd
- Company number
- 10772021
- Incorporated
- 16 May 20179 years trading
- Registered office
- Unit 9 Netley Marsh Workshops Ringwood Road, Woodlands, Southampton, SO40 7GY
- Nature of business
- Plumbing, heat and air-conditioning installation; Other retail sale not in stores, stalls or markets
Solent Water Treatment Ltd is a 9-year-old private limited company registered in Southampton, company number 10772021, one of 246 plumbing and heating companies in Southampton. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £5,792 (+102%) on the year before, to £111.
- Net assets rose in 3 of 8 year-on-year comparisons on record.
- Current assets of £31K against £41K owed within a year: 0.8 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2018 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £111 | £31K | £41K | 2 | |
| 31 Mar 2025 | -£5,681 | £23K | £41K | 2 | |
| 31 Mar 2024 | £6,992 | £36K | £39K | -2 | |
| 31 Mar 2023 | £4,223 | £28K | £38K | 0 | |
| 31 Mar 2022 | £17K | £23K | £22K | -2 | |
| 31 Mar 2021 | £23K | £38K | £31K | 0 | |
| 31 Mar 2020 | -£15K | £2,980 | £34K | -2 | |
| 31 Mar 2019 | -£8,268 | £24K | £56K | ||
| 31 Mar 2018 | -£8,190 | £15K | £67K |
Where Solent Water Treatment Ltd is registered
The registered office is in Southampton (SO40), in the New Forest local authority area, South East. Show SO40 7GY on a map.
Other trade companies in SO40
- DW Exterior Cleaning LtdCleaning companies
- Eco Clean New Forest LtdCleaning companies
- Refine Property & Marine Services LtdCleaning companies
- Evergleam Cleaning Solutions LtdCleaning companies
- JMD Building Services LimitedBuilders
- South Coast Landscape and Groundworks LtdBuilders
- A.W. Berry Developments LtdSpecialist contractors
- MLK Services LimitedSpecialist contractors
What happens if Solent Water Treatment 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 10772021
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 May 2017 (9 years ago)
- Registered office
- Unit 9 Netley Marsh Workshops Ringwood Road, Woodlands, Southampton, SO40 7GY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other retail sale not in stores, stalls or markets (SIC 47990) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 4 April 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Southampton
Other active plumbing and heating companies registered in Southampton.
- South Coast Gas Ltd2023
- Southampton Gas & Plumbing Ltd2013
- Southern Bathroom Installations Ltd2023
- Southern Heat Solutions Ltd2016
- Southern Property Maintenance Ltd2020
- Southern Wetrooms Ltd2020
- SPB Plumbing Ltd2026
- SPT Plumbing & Heating Limited2017
All plumbing and heating companies in Southampton · All trades in Southampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are Solent Water Treatment Ltd's accounts due?
Solent Water Treatment Ltd's next accounts are due at Companies House by 31 December 2027 (in 443 days), covering the period to 31 March 2027.
When is Solent Water Treatment Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Solent Water Treatment Ltd still trading?
Solent Water Treatment 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 Solent Water Treatment Ltd do?
Solent Water Treatment Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other retail sale not in stores, stalls or markets (SIC 47990).
How old is Solent Water Treatment Ltd?
Solent Water Treatment Ltd was incorporated on 16 May 2017, 9 years ago.
What is the penalty if Solent Water Treatment 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 Solent Water Treatment 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.