- Companies
- Specialist contractors
- London
- Interfix Ltd
Interfix Ltd
- Company number
- 17469853
- Incorporated
- 21 Sep 2026
- Registered office
- 128 Prestbury Square, London, SE9 4NB
- Nature of business
- Other specialised construction activities n.e.c.; Other cleaning services
Interfix Ltd is a newly incorporated private limited company registered in London, company number 17469853, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 21 June 2028, and its first CT600 is due at HMRC on 20 September 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 Interfix Ltd is registered
The registered office is in London (SE9), in the Bromley local authority area, London. Show SE9 4NB on a map.
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What happens if Interfix 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 21 June 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 22 Jun 2028 to 21 Jul 2028 | £150 |
| 1 to 3 months late | 22 Jul 2028 to 21 Sep 2028 | £375 |
| 3 to 6 months late | 22 Sep 2028 to 21 Dec 2028 | £750 |
| More than 6 months late | From 22 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2028 | £200 |
| 3 months late | 30 Dec 2028 | another £200 |
| 6 months late | 30 Mar 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 17469853
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 September 2026
- Registered office
- 128 Prestbury Square, London, SE9 4NB
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Other cleaning services (SIC 81299) - Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
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.
- 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
- Involute Technical Solutions Limited2014
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Interfix Ltd's accounts due?
Interfix Ltd's next accounts are due at Companies House by 21 June 2028 (in 617 days), covering the period to 30 September 2027.
When is Interfix 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 20 September 2027, due by 20 September 2028, and one for the period to 30 September 2027, due by 30 September 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Interfix Ltd still trading?
Interfix 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 Interfix Ltd do?
Interfix Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Other cleaning services (SIC 81299).
How old is Interfix Ltd?
Interfix Ltd was incorporated on 21 September 2026, less than a year ago.
What is the penalty if Interfix 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 Interfix 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.