- Companies
- Installers
- Coventry
- GSM Windows and Doors Ltd
GSM Windows and Doors Ltd
- Company number
- 12711768
- Incorporated
- 1 Jul 20206 years trading
- Registered office
- 481 Walsgrave Road, Coventry, CV2 4AH
- Nature of business
- Other construction installation; Glazing
GSM Windows and Doors Ltd is a 6-year-old private limited company registered in Coventry, company number 12711768, one of 119 installation companies (insulation, lifts, shutters and similar) in Coventry. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £12K (+56%) on the year before, to -£9,280.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £3,541 against £35K owed within a year: 0.1 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | -£9,280 | £3,541 | £35K | 1 | |
| 31 Jul 2024 | -£21K | £1,571 | £25K | 1 | |
| 31 Jul 2023 | -£11K | £5,723 | £19K | 1 | |
| 31 Jul 2022 | £2,954 | £5,151 | £11K | 0 | |
| 31 Jul 2021 | £580 | £3,818 | £6,598 | 0 |
Where GSM Windows and Doors Ltd is registered
The registered office is in Coventry (CV2), in the Coventry local authority area, West Midlands. Show CV2 4AH on a map.
Other trade companies in CV2
- Precision Build Group LtdSpecialist contractors
- Youngsrenovations&Maintenance LtdBuilders
- No Limit Contractors LtdBuilders
- Cov Service Station LtdMechanics and garages
- Stronghold Fencing LtdLandscapers and gardeners
- Garden Craft Services LimitedLandscapers and gardeners
- Abm Mechanic LtdMechanics and garages
- Bains & Bains Developments LimitedProperty developers
What happens if GSM Windows and Doors 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 12711768
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 July 2020 (6 years ago)
- Registered office
- 481 Walsgrave Road, Coventry, CV2 4AH
- Nature of business
- Other construction installation (SIC 43290)
Glazing (SIC 43342) - Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 8 May 2026
- Previous names
- 37K9S Ltd (until 3 May 2024)
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 Coventry
Other active installation companies (insulation, lifts, shutters and similar) registered in Coventry.
- Hall Fire and Security Group Ltd2026
- Heatref Controls Ltd2019
- Holl and Holl Installations Limited2011
- Industrial & Heating Services Limited1985
- Jass Builder Limited2018
- JJG Building Services Limited2022
- Jmtownsend Limited2016
- JNT Const Ltd2026
All installation companies (insulation, lifts, shutters and similar) in Coventry · All trades in Coventry · Installers across the UK
Frequently asked questions
When are GSM Windows and Doors Ltd's accounts due?
GSM Windows and Doors Ltd's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is GSM Windows and Doors Ltd's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is GSM Windows and Doors Ltd still trading?
GSM Windows and Doors 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 GSM Windows and Doors Ltd do?
GSM Windows and Doors Ltd is registered under Other construction installation (SIC 43290); Glazing (SIC 43342).
How old is GSM Windows and Doors Ltd?
GSM Windows and Doors Ltd was incorporated on 1 July 2020, 6 years ago.
What is the penalty if GSM Windows and Doors 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 GSM Windows and Doors 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.