- Company number
- 14420638
- Incorporated
- 14 Oct 20223 years trading
- Registered office
- 424 Katherine Road, London, E7 8NP
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Construction of other civil engineering projects n.e.c.
Sound Security Ltd is a 3-year-old private limited company registered in London, company number 14420638, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £790 (-112.2%) on the year before, to -£1,494.
- Current assets of -£704 against £790 owed within a year: -0.9 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | -£1,494 | -£704 | -£704 | £790 | 1 |
| 31 Oct 2024 | -£704 | -£704 | -£704 | 1 | |
| 31 Oct 2023 | £1 | £1 |
Where Sound Security Ltd is registered
The registered office is in London (E7), in the Newham local authority area, London. Show E7 8NP on a map.
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Also registered at this address
1 other company uses the same registered office as Sound Security Ltd.
- Top Notch Constructtions LtdBuilders
What happens if Sound Security 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 14420638
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 October 2022 (3 years ago)
- Registered office
- 424 Katherine Road, London, E7 8NP
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Construction of other civil engineering projects n.e.c. (SIC 42990) - Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 17 April 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in London
Other active building contractors registered in London.
- Source Civil UK Ltd2019
- South Constructions Ltd2015
- South Cornwall Construction Services Limited2024
- South East Builders Ltd2026
- South Kent Interiors Ltd2021
- South London Conversions Ltd2014
- South London Renovations Ltd2013
- South Somerset Cans Ltd2025
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Sound Security Ltd's accounts due?
Sound Security Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Sound Security Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Sound Security Ltd still trading?
Sound Security 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 Sound Security Ltd do?
Sound Security Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Sound Security Ltd?
Sound Security Ltd was incorporated on 14 October 2022, 3 years ago.
What is the penalty if Sound Security 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 Sound Security 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.