- Companies
- Installers
- Margate
- SJC Windows & Doors Ltd
SJC Windows & Doors Ltd
- Company number
- 14603714
- Incorporated
- 19 Jan 20233 years trading
- Registered office
- 10 Fitzmary Avenue, Margate, CT9 5EL
- Nature of business
- Other construction installation
SJC Windows & Doors Ltd is a 3-year-old private limited company registered in Margate, company number 14603714, one of 20 installation companies (insulation, lifts, shutters and similar) in Margate. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £6,756 (+243.8%) on the year before, to £9,527.
- Current assets of £36K against £17K owed within a year: 2.2 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £9,527 | £36K | £17K | 0 | |
| 31 Jan 2024 | £2,771 | £17K | £8,242 | 0 |
Where SJC Windows & Doors Ltd is registered
The registered office is in Margate (CT9), in the Thanet local authority area, South East. Show CT9 5EL on a map.
Other trade companies in CT9
- KMH Property Group LtdProperty developers
- JR Electrical Services (Kent) LtdMachinery repair and installation
- CSL Ground Solutions LtdInstallers
- Pej Court Developments LtdBuilders
- Alro Interior Building LtdFinishing trades
- Tune Up Garage LtdMechanics and garages
- KM Group LtdProperty developers
- S.Groundworks LtdCivil engineering
Also registered at this address
1 other company uses the same registered office as SJC Windows & Doors Ltd.
- SJC Construction LtdBuilders
What happens if SJC Windows & 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 14603714
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 January 2023 (3 years ago)
- Registered office
- 10 Fitzmary Avenue, Margate, CT9 5EL
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 18 January 2026
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 Margate
Other active installation companies (insulation, lifts, shutters and similar) registered in Margate.
- Smiths Installations Limited2022
- Southeast Sprinkler & Dryriser Ltd2019
- Tomes Homes Maintenance Limited2026
- Afs Fencing & Groundworks Ltd2019
- C R I Manufacturing Limited2003
- Conservatory Roof Insulation 247 Ltd2024
- Cosy Toes Heating Services Limited2018
- CRB Property Maintenance & Refurbishments Ltd2026
All installation companies (insulation, lifts, shutters and similar) in Margate · All trades in Margate · Installers across the UK
Frequently asked questions
When are SJC Windows & Doors Ltd's accounts due?
SJC Windows & Doors Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is SJC Windows & Doors Ltd's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is SJC Windows & Doors Ltd still trading?
SJC Windows & 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 SJC Windows & Doors Ltd do?
SJC Windows & Doors Ltd is registered under Other construction installation (SIC 43290).
How old is SJC Windows & Doors Ltd?
SJC Windows & Doors Ltd was incorporated on 19 January 2023, 3 years ago.
What is the penalty if SJC Windows & 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 SJC Windows & 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.