- Companies
- Glaziers
- Southampton
- Southern Window Services Ltd
Southern Window Services Ltd
- Company number
- 07170357
- Incorporated
- 25 Feb 201016 years trading
- Registered office
- 1 Brooks Bank House, Pound Lane Copythorne, Southampton, Hampshire, SO40 2PD
- Nature of business
- Glazing
Southern Window Services Ltd is a 16-year-old private limited company registered in Southampton, company number 07170357, one of 32 glazing companies 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.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Southern Window Services LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £132K (+95.7%) on the year before, to £270K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £519K against £307K owed within a year: 1.7 times cover.
- 5 employees on average, up from 4 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £270K | £519K | £307K | 5 | |
| 31 Mar 2024 | £138K | £156K | £81K | 4 | |
| 31 Mar 2023 | £178K | £79K | £166K | £77K | 4 |
| 31 Mar 2022 | £78K | £143K | £58K | 4 | |
| 31 Mar 2021 | £48K | £123K | £42K | 4 | |
| 31 Mar 2020 | £43K | £54K | £32K | 2 | |
| 31 Mar 2019 | £74K | £80K | £29K | ||
| 31 Mar 2018 | £82K | £81K | £23K | ||
| 31 Mar 2017 | £77K | £136K | £83K | ||
| 31 Mar 2016 | £103K | £94K | £120K | £46K |
Where Southern Window Services Ltd is registered
The registered office is in Southampton (SO40), in the New Forest local authority area, South East. Show SO40 2PD 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 Southern Window Services 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
- 07170357
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 February 2010 (16 years ago)
- Registered office
- 1 Brooks Bank House, Pound Lane Copythorne, Southampton, Hampshire, SO40 2PD
- Nature of business
- Glazing (SIC 43342)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 4 January 2026
Filing notes for glazing companies
Glazing companies often take deposits before work starts. Deposits held at the year end are a liability, not income, until the job is done.
Similar companies in Southampton
Other active glazing companies registered in Southampton.
- Square 1 Architectural Solutions Limited2011
- Square 1 Balustrades Limited2017
- SR Glazing Ltd2020
- The Glassmen Limited2020
- The Glassworks Windows and Doors Southampton Ltd2020
- Timeless Sashes Limited2015
- Vega Designs Ltd2019
- Warsash Glazing Ltd2022
All glazing companies in Southampton · All trades in Southampton · Glaziers across the UK
Frequently asked questions
When are Southern Window Services Ltd's accounts due?
Southern Window Services 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 Southern Window Services 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 Southern Window Services Ltd still trading?
Southern Window Services 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 Southern Window Services Ltd do?
Southern Window Services Ltd is registered under Glazing (SIC 43342).
How old is Southern Window Services Ltd?
Southern Window Services Ltd was incorporated on 25 February 2010, 16 years ago.
What is the penalty if Southern Window Services 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 Southern Window Services 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.