- Companies
- Installers
- London
- Intumex Ltd
Intumex Ltd
- Company number
- 17221435
- Incorporated
- 14 May 2026
- Registered office
- 124-128 City Road, London, EC1V 2NX
- Nature of business
- Other construction installation; Other specialised construction activities n.e.c.
Intumex Ltd is a newly incorporated private limited company registered in London, company number 17221435, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 14 February 2028, and its first CT600 is due at HMRC on 13 May 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Intumex Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NX on a map.
Other trade companies in EC1V
- Cardiff Electrical Solutions LtdElectricians
- Edemis Construction LtdBuilders
- Zaylan LtdProperty developers
- Pronto Roofing and Construction LtdRoofers
- Instal Systems LtdPlumbers and heating engineers
- J&R Partners LtdBuilders
- The Tile Craft LtdFinishing trades
- Cathal Od Solutions LtdSpecialist contractors
Shared registered office
355 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Intumex 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 14 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 15 Feb 2028 to 14 Mar 2028 | £150 |
| 1 to 3 months late | 15 Mar 2028 to 14 May 2028 | £375 |
| 3 to 6 months late | 15 May 2028 to 14 Aug 2028 | £750 |
| More than 6 months late | From 15 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 17221435
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 May 2026
- Registered office
- 124-128 City Road, London, EC1V 2NX
- Nature of business
- Other construction installation (SIC 43290)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
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 London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Inzonex Ltd2025
- Ips Interface Ltd2020
- Iron Wolf Contractors Ltd2021
- Ironclad Fire Protection Limited2025
- Ironguard Security Systems Ltd2025
- Irwell Fire Ltd2021
- Ish UK Maintenance Ltd2026
- Isl Installation Solutions Ltd2013
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Intumex Ltd's accounts due?
Intumex Ltd's next accounts are due at Companies House by 14 February 2028 (in 490 days), covering the period to 31 May 2027.
When is Intumex Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 13 May 2027, due by 13 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Intumex Ltd still trading?
Intumex 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 Intumex Ltd do?
Intumex Ltd is registered under Other construction installation (SIC 43290); Other specialised construction activities n.e.c. (SIC 43999).
How old is Intumex Ltd?
Intumex Ltd was incorporated on 14 May 2026, less than a year ago.
What is the penalty if Intumex 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 Intumex 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.