- Companies
- Specialist contractors
- Shepperton
- Southern Door Automation Ltd
Southern Door Automation Ltd
- Company number
- 09957347
- Incorporated
- 18 Jan 201610 years trading
- Registered office
- 28 Grove Road, Shepperton, TW17 9EL
- Nature of business
- Other specialised construction activities n.e.c.
Southern Door Automation Ltd is a 10-year-old private limited company registered in Shepperton, company number 09957347, one of 16 specialist construction companies in Shepperton. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 £9,162 (+26.7%) on the year before, to £44K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £114K against £57K owed within a year: 2.0 times cover.
- 1 employee on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Dec 2025 | £44K | £114K | £57K | 1 | |
| 31 Dec 2024 | £34K | £105K | £67K | 1 | |
| 31 Dec 2023 | £33K | £78K | £51K | 1 | |
| 31 Dec 2022 | £22K | £68K | £45K | ||
| 31 Dec 2021 | £3,992 | £48K | £38K | 1 | |
| 31 Dec 2020 | £499 | £55K | £43K | 1 | |
| 31 Dec 2019 | £18K | £43K | £29K | 1 | |
| 31 Dec 2018 | £14K | £43K | £34K | 1 | |
| 31 Dec 2017 | £4,529 | £17K | £20K | ||
| 31 Dec 2016 | £6,453 | £13K | £16K |
Where Southern Door Automation Ltd is registered
The registered office is in Shepperton (TW17), in the Spelthorne local authority area, South East. Show TW17 9EL on a map.
Other trade companies in TW17
- Oakclean LtdCleaning companies
- Ideal Cooling LtdPlumbers and heating engineers
- Anc Vehicle LtdMotor traders
- Magics Construction LtdFinishing trades
- Mullen Slade LimitedProperty developers
- Ventrax LtdPlumbers and heating engineers
- Jhvehiclegroup LtdMotor traders
- GR Automotive Mobile Mechanic LimitedMechanics and garages
What happens if Southern Door Automation 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 09957347
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 January 2016 (10 years ago)
- Registered office
- 28 Grove Road, Shepperton, TW17 9EL
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 17 January 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Shepperton
Other active specialist construction companies registered in Shepperton.
- Thames Riverworks Ltd2013
- Thames Riverworks Piling Limited2004
- Thames Rooms Limited2012
- Wheston Hill Project Services Ltd2012
- WM Commissioning Ltd.2011
- Advanced Property Services Limited2006
- Arlie Construction Limited2025
- B & R Steel Limited2008
All specialist construction companies in Shepperton · All trades in Shepperton · Specialist contractors across the UK
Frequently asked questions
When are Southern Door Automation Ltd's accounts due?
Southern Door Automation Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Southern Door Automation Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Southern Door Automation Ltd still trading?
Southern Door Automation 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 Southern Door Automation Ltd do?
Southern Door Automation Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Southern Door Automation Ltd?
Southern Door Automation Ltd was incorporated on 18 January 2016, 10 years ago.
What is the penalty if Southern Door Automation 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 Southern Door Automation 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.