Southern Aluminium and UPVC Window Company (London) Limited
- Company number
- 01543278
- Incorporated
- 4 Feb 198145 years trading
- Registered office
- Unit 2A Shakespeare Industrial Estate, Shakespeare Street, Watford, Hertfordshire, WD24 5RX
- Nature of business
- Glazing
Southern Aluminium and UPVC Window Company (London) Limited is a 45-year-old private limited company registered in Watford, company number 01543278, one of 15 glazing companies in Watford. Its next accounts are due at Companies House on 7 July 2027, and its first CT600 is due at HMRC on 30 September 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 Aluminium and UPVC Window Company (London) LimitedOr 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 £22K (+6.1%) on the year before, to £375K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £2M against £2M owed within a year: 1.0 times cover.
- 30 employees on average, up from 28 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £375K | £1.6M | £2M | £2M | 30 |
| 30 Sep 2024 | £353K | £2.2M | £2.6M | £2.7M | 28 |
| 30 Sep 2023 | £391K | £1.6M | £1.9M | £2M | 24 |
| 30 Sep 2022 | £214K | £930K | £1.4M | £1.4M | 21 |
| 30 Sep 2021 | £1.3M | £1.3M | £1.9M | £703K | 20 |
| 30 Sep 2020 | £1M | £1.1M | £1.5M | £619K | 19 |
| 30 Sep 2019 | £845K | £847K | £1.3M | £606K | 17 |
| 30 Sep 2018 | £806K | £829K | £1.1M | £419K | 17 |
| 30 Sep 2017 | £638K | £879K | £1.1M | £585K | 15 |
| 30 Sep 2016 | £708K | £802K | £1.1M | £455K |
Where Southern Aluminium and UPVC Window Company (London) Limited is registered
The registered office is in Watford (WD24), in the Watford local authority area, East of England. Show WD24 5RX on a map.
Other trade companies in WD24
- VK28 Services LtdFinishing trades
- DRR Builders LtdBuilders
- Redmarsh Trade LimitedMotor traders
- Herts Trading LtdMotor traders
- Coversure Roofing & Building LtdRoofers
- LLS Building LimitedBuilders
- Snagsense LtdSpecialist contractors
- D&X Cleaning Solutions LtdCleaning companies
What happens if Southern Aluminium and UPVC Window Company (London) 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 7 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 8 Jul 2027 to 7 Aug 2027 | £150 |
| 1 to 3 months late | 8 Aug 2027 to 7 Oct 2027 | £375 |
| 3 to 6 months late | 8 Oct 2027 to 7 Jan 2028 | £750 |
| More than 6 months late | From 8 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 8 Oct 2027 | £200 |
| 3 months late | 7 Jan 2028 | another £200 |
| 6 months late | 7 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 7 Oct 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
- 01543278
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 February 1981 (45 years ago)
- Registered office
- Unit 2A Shakespeare Industrial Estate, Shakespeare Street, Watford, Hertfordshire, WD24 5RX
- Nature of business
- Glazing (SIC 43342)
- Year end
- 7 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 15 January 2026
- Charges (mortgages)
- 1 outstanding of 2 registered
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 Watford
Other active glazing companies registered in Watford.
- (UK) Window Fix Limited2022
- B M Windows & Doors Limited2010
- Design Windows System Ltd2024
- Et Double Glazing Ltd2026
- Finepoint Glass London Ltd2013
- Glass Genius Ltd2022
- Glen Windows and Doors Limited1991
- H & J Merchants Ltd2018
All glazing companies in Watford · All trades in Watford · Glaziers across the UK
Frequently asked questions
When are Southern Aluminium and UPVC Window Company (London) Limited's accounts due?
Southern Aluminium and UPVC Window Company (London) Limited's next accounts are due at Companies House by 7 July 2027 (in 267 days), covering the period to 7 October 2026.
When is Southern Aluminium and UPVC Window Company (London) Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 September 2026, due by 30 September 2027, and one for the period to 7 October 2026, due by 7 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Southern Aluminium and UPVC Window Company (London) Limited still trading?
Southern Aluminium and UPVC Window Company (London) 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 Southern Aluminium and UPVC Window Company (London) Limited do?
Southern Aluminium and UPVC Window Company (London) Limited is registered under Glazing (SIC 43342).
How old is Southern Aluminium and UPVC Window Company (London) Limited?
Southern Aluminium and UPVC Window Company (London) Limited was incorporated on 4 February 1981, 45 years ago.
What is the penalty if Southern Aluminium and UPVC Window Company (London) 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 Southern Aluminium and UPVC Window Company (London) 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.