- Companies
- Specialist contractors
- London
- Ilcon Limited
Ilcon Limited
- Company number
- 15655542
- Incorporated
- 17 Apr 20242 years trading
- Registered office
- 25 Blenheim Rise, Talbot Road, London, N15 4TJ
- Nature of business
- Other specialised construction activities n.e.c.; Wholesale of textiles; Wholesale of wood, construction materials and sanitary equipment; Management consultancy activities other than financial management
Ilcon Limited is a 2-year-old private limited company registered in London, company number 15655542, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 January 2028, and the CT600 for the period to 30 April 2027 is due at HMRC on 30 April 2028.
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 £1,149 (+107.5%) on the year before, to £2,218.
- Current assets of £15K against £13K owed within a year: 1.2 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2026 | £2,218 | £15K | £13K | 2 | |
| 30 Apr 2025 | £1,069 | £12K | £10K | 1 |
Where Ilcon Limited is registered
The registered office is in London (N15), in the Haringey local authority area, London. Show N15 4TJ on a map.
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What happens if Ilcon Limited 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 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2028 to 29 Feb 2028 | £150 |
| 1 to 3 months late | 1 Mar 2028 to 30 Apr 2028 | £375 |
| 3 to 6 months late | 1 May 2028 to 31 Jul 2028 | £750 |
| More than 6 months late | From 1 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 2029 | 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
- 15655542
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 April 2024 (2 years ago)
- Registered office
- 25 Blenheim Rise, Talbot Road, London, N15 4TJ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Wholesale of textiles (SIC 46410)
Wholesale of wood, construction materials and sanitary equipment (SIC 46730)
Management consultancy activities other than financial management (SIC 70229) - Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2026
- Last confirmation statement
- 29 October 2025
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.
- Ilhan Beysimov Ltd2013
- Im Dryliner Ltd2026
- Imagedesign Limited2015
- Imaggio Interiors Limited2005
- Imara Grato Limited2025
- Img Corporation Ltd2018
- Impact Procraft Construction Group Ltd2022
- Impartial Assessments Limited2020
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Ilcon Limited's accounts due?
Ilcon Limited's next accounts are due at Companies House by 31 January 2028 (in 476 days), covering the period to 30 April 2027.
When is Ilcon Limited's CT600 due?
The CT600 for the period to 30 April 2027 is due at HMRC by 30 April 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2028.
Is Ilcon Limited still trading?
Ilcon Limited 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 Ilcon Limited do?
Ilcon Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); Wholesale of textiles (SIC 46410); Wholesale of wood, construction materials and sanitary equipment (SIC 46730); Management consultancy activities other than financial management (SIC 70229).
How old is Ilcon Limited?
Ilcon Limited was incorporated on 17 April 2024, 2 years ago.
What is the penalty if Ilcon Limited 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 Ilcon Limited 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.