- Companies
- Installers
- Southampton
- Waterside Windows (South) Ltd
Waterside Windows (South) Ltd
- Company number
- 10047497
- Incorporated
- 7 Mar 201610 years trading
- Registered office
- Hardley Industrial Estate Hardley, Hythe, Southampton, SO45 3NQ
- Nature of business
- Other construction installation
Waterside Windows (South) Ltd is a 10-year-old private limited company registered in Southampton, company number 10047497, one of 132 installation companies (insulation, lifts, shutters and similar) in Southampton. 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 £15K (-242.7%) on the year before, to -£21K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of -£920 against £25K owed within a year: -0.0 times cover.
- 3 employees on average, up from -3 the year before.
- Balance sheets on record for 10 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | -£21K | -£920 | £25K | 3 | |
| 31 Mar 2024 | -£6,129 | -£6,219 | £4,656 | -3 | |
| 31 Mar 2023 | £15K | £16K | £6,261 | -3 | |
| 31 Mar 2022 | £17K | £17K | £4,769 | -3 | |
| 31 Mar 2021 | £15K | £1,863 | £8,665 | -3 | |
| 31 Mar 2020 | £23K | £7,097 | £11K | -3 | |
| 31 Mar 2019 | £27K | £13K | £9,123 | -3 | |
| 31 Mar 2018 | £417 | £26K | £26K | ||
| 31 Mar 2017 | £454 | £4,965 | £8,249 | £10K | 2 |
| 30 Mar 2017 | £454 | £8,249 | £9,838 |
Where Waterside Windows (South) Ltd is registered
The registered office is in Southampton (SO45), in the New Forest local authority area, South East. Show SO45 3NQ on a map.
Other trade companies in SO45
- PRG Installation Services LimitedMachinery repair and installation
- Off the Rails Paintworks LtdPainters and decorators
- Hpexterior LtdCleaning companies
- Amt Automotive (Dibden) LtdMotor traders
- HP Exterior Clean LtdCleaning companies
- Valmora Projects LtdProperty developers
- New Leaf Naturescapes LtdLandscapers and gardeners
- Southern Vehicle Services LtdMechanics and garages
What happens if Waterside Windows (South) 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
- 10047497
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 March 2016 (10 years ago)
- Registered office
- Hardley Industrial Estate Hardley, Hythe, Southampton, SO45 3NQ
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 14 November 2025
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Southampton
Other active installation companies (insulation, lifts, shutters and similar) registered in Southampton.
- Wedderburn Retail Solutions Limited2008
- Windor Home Improvements Limited2018
- 1682 Productions Ltd2022
- Ador Garage Doors Ltd2019
- Advanced Timber Systems Limited2011
- Af the Full Deck Limited2026
- Almo Power Ltd2012
- Apex Outdoor Spaces Ltd2019
All installation companies (insulation, lifts, shutters and similar) in Southampton · All trades in Southampton · Installers across the UK
Frequently asked questions
When are Waterside Windows (South) Ltd's accounts due?
Waterside Windows (South) Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Waterside Windows (South) 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 Waterside Windows (South) Ltd still trading?
Waterside Windows (South) 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 Waterside Windows (South) Ltd do?
Waterside Windows (South) Ltd is registered under Other construction installation (SIC 43290).
How old is Waterside Windows (South) Ltd?
Waterside Windows (South) Ltd was incorporated on 7 March 2016, 10 years ago.
What is the penalty if Waterside Windows (South) 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 Waterside Windows (South) 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.