- Companies
- Installers
- Hounslow
- Class1 Windows and Doors Limited
Class1 Windows and Doors Limited
- Company number
- 10190469
- Incorporated
- 20 May 201610 years trading
- Registered office
- 1 Maswell Park Road, Hounslow, TW3 2DL
- Nature of business
- Other construction installation
Class1 Windows and Doors Limited is a 10-year-old private limited company registered in Hounslow, company number 10190469, one of 32 installation companies (insulation, lifts, shutters and similar) in Hounslow. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 up £2,312 (+7.8%) on the year before, to £32K.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £54K against £3,623 owed within a year: more than 10 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £32K | £157 | £54K | £3,623 | 0 |
| 31 May 2024 | £29K | £618 | £53K | £4,687 | 0 |
| 31 May 2023 | £36K | £59K | £1,743 | 2 | |
| 31 May 2022 | £30K | £51K | £5,413 | 1 | |
| 31 May 2021 | £27K | £44K | £57K | 1 | |
| 31 May 2020 | £3,633 | £17K | £15K | 1 | |
| 31 May 2019 | £526 | £353 | £12K | £11K | |
| 31 May 2018 | £407 | £950 | £11K | £11K | |
| 31 May 2017 | £3,114 | £3,518 | £14K | £10K | 1 |
Where Class1 Windows and Doors Limited is registered
The registered office is in Hounslow (TW3), in the Hounslow local authority area, London. Show TW3 2DL on a map.
Other trade companies in TW3
- Bela Building Development LimitedProperty developers
- JTRC LtdPlumbers and heating engineers
- RS Motoring LtdMotor traders
- Ramidi Constructions LtdBuilders
- Axis Projects 01 LtdBuilders
- WBSC LtdProperty developers
- Khosa Construction Group LtdProperty developers
- MJ Garden and Cleaning Solutions LtdCleaning companies
What happens if Class1 Windows and Doors 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 10190469
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 May 2016 (10 years ago)
- Registered office
- 1 Maswell Park Road, Hounslow, TW3 2DL
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 8 September 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 Hounslow
Other active installation companies (insulation, lifts, shutters and similar) registered in Hounslow.
- Desi Scaffolding Energy Ltd2023
- DR Fire Protection Ltd2024
- Fit My Bedrooms Ltd2019
- Giraffe Roofing Limited2025
- Green by Design Limited1993
- Home Facilities Ltd2020
- JFM Neate Ltd2025
- Josan Home Improvement Limited2020
All installation companies (insulation, lifts, shutters and similar) in Hounslow · All trades in Hounslow · Installers across the UK
Frequently asked questions
When are Class1 Windows and Doors Limited's accounts due?
Class1 Windows and Doors Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Class1 Windows and Doors Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Class1 Windows and Doors Limited still trading?
Class1 Windows and Doors Limited is listed as active on the Companies House register (checked 13 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 Class1 Windows and Doors Limited do?
Class1 Windows and Doors Limited is registered under Other construction installation (SIC 43290).
How old is Class1 Windows and Doors Limited?
Class1 Windows and Doors Limited was incorporated on 20 May 2016, 10 years ago.
What is the penalty if Class1 Windows and Doors 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 Class1 Windows and Doors Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.