- Companies
- Specialist contractors
- London
- Mastico Ltd
Mastico Ltd
- Company number
- 16054659
- Incorporated
- 1 Nov 20241 year trading
- Registered office
- 3-4 New Street, London, EC2M 4TP
- Nature of business
- Other specialised construction activities n.e.c.
Mastico Ltd is a 1-year-old private limited company registered in London, company number 16054659, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 2026.
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 Mastico Ltd is registered
The registered office is in London (EC2M), in the City of London local authority area, London. Show EC2M 4TP on a map.
Other trade companies in EC2M
- Dwarrowdelf LtdCivil engineering
- Ijm (Paddington) LimitedProperty developers
- Floe Group LtdPlumbers and heating engineers
- Butts Ultra Group LimitedGroundworks and demolition
- Ink's Portfolio LtdFinishing trades
- Senno Property 1 LimitedProperty developers
- Senno Holding LimitedProperty developers
- Captpower Services LtdMachinery repair and installation
Also registered at this address
3 other companies use the same registered office as Mastico Ltd.
- Full Circle Digital LtdSpecialist contractors
- Two Construction Group LtdSpecialist contractors
- Vitrix Facades LtdInstallers
What happens if Mastico 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 | 31 Mar 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Mar 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
- 16054659
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 November 2024 (1 year ago)
- Registered office
- 3-4 New Street, London, EC2M 4TP
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 30 March (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 31 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.
- Mateo Build Ltd2025
- Matergroup Ltd2016
- Material Concepts Limited2011
- Material Share Ltd2024
- Materialsinc. Ltd2026
- Matis Group Ltd2025
- Matos Decorators Ltd2017
- Matrix Construction Services Limited2004
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Mastico Ltd's accounts due?
Mastico Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 30 March 2026.
When is Mastico 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 31 October 2025, due by 31 October 2026, and one for the period to 30 March 2026, due by 30 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mastico Ltd still trading?
Mastico 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 Mastico Ltd do?
Mastico Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Mastico Ltd?
Mastico Ltd was incorporated on 1 November 2024, 1 year ago.
What is the penalty if Mastico 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 Mastico 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.