- Companies
- Specialist contractors
- London
- M14 Insulation Ltd
M14 Insulation Ltd
- Company number
- 16850892
- Incorporated
- 12 Nov 2025
- Registered office
- 103 Swaythling Close, London, N18 2QQ
- Nature of business
- Other specialised construction activities n.e.c.
M14 Insulation Ltd is a newly incorporated private limited company registered in London, company number 16850892, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 12 August 2027, and its first CT600 is due at HMRC on 11 November 2027.
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 M14 Insulation Ltd is registered
The registered office is in London (N18), in the Enfield local authority area, London. Show N18 2QQ on a map.
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Also registered at this address
2 other companies use the same registered office as M14 Insulation Ltd.
- Imperial Thermal LtdBuilders
- Recrutio LtdSpecialist contractors
What happens if M14 Insulation 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 12 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 13 Aug 2027 to 12 Sep 2027 | £150 |
| 1 to 3 months late | 13 Sep 2027 to 12 Nov 2027 | £375 |
| 3 to 6 months late | 13 Nov 2027 to 12 Feb 2028 | £750 |
| More than 6 months late | From 13 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16850892
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 November 2025
- Registered office
- 103 Swaythling Close, London, N18 2QQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 November (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.
- M4 Consultancy Services Ltd2021
- Ma Services & Cleaning Ltd2025
- Mabgc Ltd2023
- Mabzy Ltd2026
- Mac An Bhaird Limited2019
- Mac Rope Access Ltd2019
- Mace Energy Ltd2026
- Macfactor Ltd2026
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are M14 Insulation Ltd's accounts due?
M14 Insulation Ltd's next accounts are due at Companies House by 12 August 2027 (in 303 days), covering the period to 30 November 2026.
When is M14 Insulation 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 11 November 2026, due by 11 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is M14 Insulation Ltd still trading?
M14 Insulation 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 M14 Insulation Ltd do?
M14 Insulation Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is M14 Insulation Ltd?
M14 Insulation Ltd was incorporated on 12 November 2025, less than a year ago.
What is the penalty if M14 Insulation 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 M14 Insulation 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.