- Companies
- Specialist contractors
- London
- Interconnect Systems Av Ltd
Interconnect Systems Av Ltd
- Company number
- 11752990
- Incorporated
- 7 Jan 20197 years trading
- Registered office
- Flat 1104, Jet House, 5 Anderson Road, London, SE3 9JQ
- Nature of business
- Other specialised construction activities n.e.c.
Interconnect Systems Av Ltd is a 7-year-old private limited company registered in London, company number 11752990, one of 4,318 specialist construction companies in London. 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 £83K (+128.7%) on the year before, to £147K.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- Current assets of £149K against £59K owed within a year: 2.5 times cover.
- 4 employees on average, up from 3 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £147K | £106K | £149K | £59K | 4 |
| 31 Jan 2024 | £64K | £72K | £90K | £48K | 3 |
| 31 Jan 2023 | £41K | £70K | £77K | £57K | 2 |
| 31 Jan 2022 | £60K | £64K | 0 | ||
| 31 Jan 2021 | £41K | £17K | 2 | ||
| 31 Jan 2020 | £13K | £16K |
Where Interconnect Systems Av Ltd is registered
The registered office is in London (SE3), in the Greenwich local authority area, London. Show SE3 9JQ on a map.
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What happens if Interconnect Systems Av 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
- 11752990
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 January 2019 (7 years ago)
- Registered office
- Flat 1104, Jet House, 5 Anderson Road, London, SE3 9JQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 3 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 London
Other active specialist construction companies registered in London.
- Interfix Ltd2026
- Interior Address Limited2009
- Interior Space Solutions Limited2011
- Interlink Contractors Ltd2011
- International Haussmann Renov Limited2026
- Intro Messebau GMBH Ltd2005
- Intronec Estate Limited2020
- Inventive Designs London Ltd2014
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Frequently asked questions
When are Interconnect Systems Av Ltd's accounts due?
Interconnect Systems Av 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 Interconnect Systems Av 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 Interconnect Systems Av Ltd still trading?
Interconnect Systems Av 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 Interconnect Systems Av Ltd do?
Interconnect Systems Av Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Interconnect Systems Av Ltd?
Interconnect Systems Av Ltd was incorporated on 7 January 2019, 7 years ago.
What is the penalty if Interconnect Systems Av 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 Interconnect Systems Av 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.