- Company number
- 01637509
- Incorporated
- 24 May 198244 years trading
- Registered office
- 5 Dorien RD, Raynes Park, London, Dorien Road, London, SW20 8EL
- Nature of business
- Glazing
Windglass Windows Limited is a 44-year-old private limited company registered in London, company number 01637509, one of 307 glazing companies in London. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £34K (-7.6%) on the year before, to £419K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- 2 employees on average, down from 3 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 Jun 2025 | £419K | £52K | £449K | 2 | |
| 30 Jun 2024 | £453K | £23K | £820K | £338K | 3 |
| 30 Jun 2023 | £386K | £103K | £863K | £381K | 7 |
| 30 Jun 2022 | £400K | £13K | £777K | £231K | 9 |
| 30 Jun 2021 | £391K | £211K | £846K | £250K | 8 |
| 30 Jun 2020 | £329K | £114K | £639K | £278K | 8 |
| 30 Jun 2019 | £275K | £223K | £421K | £168K | |
| 30 Jun 2018 | £261K | £243K | £529K | £295K | |
| 30 Jun 2017 | £202K | £186K | £398K | £212K | |
| 30 Jun 2016 | £126K | £26K | £260K | £148K |
Where Windglass Windows Limited is registered
The registered office is in London (SW20), in the Merton local authority area, London. Show SW20 8EL on a map.
Other trade companies in SW20
- Resmor LtdBuilders
- Justify Advisory LimitedCivil engineering
- Busy Bee Homes LtdProperty developers
- Jyoti Enterprises LtdElectricians
- Bilkins Mechanical LimitedPlumbers and heating engineers
- Tremtec Group Services LtdBuilders
- HRS Services LtdCleaning companies
- Double Glazed Windows and Doors LtdGlaziers
What happens if Windglass Windows 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 01637509
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 May 1982 (44 years ago)
- Registered office
- 5 Dorien RD, Raynes Park, London, Dorien Road, London, SW20 8EL
- Nature of business
- Glazing (SIC 43342)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 9 July 2026
- Charges (mortgages)
- 0 outstanding of 3 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 London
Other active glazing companies registered in London.
- Window World Ltd2023
- Windows 2020 Limited2020
- Wulf Windows Ltd2025
- XP Window Films Ltd2026
- You Choose (the Independent Window Brokers) Limited2002
- Zaar Glazing Limited2025
- Zoi Glazing Ltd2026
- 1ST Local Window Repair Ltd2026
All glazing companies in London · All trades in London · Glaziers across the UK
Frequently asked questions
When are Windglass Windows Limited's accounts due?
Windglass Windows Limited's next accounts are due at Companies House by 31 March 2027 (in 170 days), covering the period to 30 June 2026.
When is Windglass Windows Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Windglass Windows Limited still trading?
Windglass Windows 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 Windglass Windows Limited do?
Windglass Windows Limited is registered under Glazing (SIC 43342).
How old is Windglass Windows Limited?
Windglass Windows Limited was incorporated on 24 May 1982, 44 years ago.
What is the penalty if Windglass Windows 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 Windglass Windows 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.