- Companies
- Specialist contractors
- London
- Mas London Group Ltd
Mas London Group Ltd
- Company number
- 17210525
- Incorporated
- 11 May 2026
- Registered office
- 87 Millmead Business Centre, Mill Mead Road, London, N17 9QU
- Nature of business
- Other specialised construction activities n.e.c.; Non-specialised wholesale trade; Management consultancy activities other than financial management; Other education n.e.c.
Mas London Group Ltd is a newly incorporated private limited company registered in London, company number 17210525, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 11 February 2028, and its first CT600 is due at HMRC on 10 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.
Is this your company?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Mas London Group LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Where Mas London Group Ltd is registered
The registered office is in London (N17), in the Haringey local authority area, London. Show N17 9QU on a map.
Other trade companies in N17
- JKL Building & Maintenance LtdFinishing trades
- Vas-Vent LtdSpecialist contractors
- Zbrsons LtdMotor traders
- Bally 33 LtdBuilders
- Abcd Cleaning LtdCleaning companies
- Mie Cleaning Solutions LtdCleaning companies
- Worklane LtdRoofers
- Figzu LtdCleaning companies
Also registered at this address
3 other companies use the same registered office as Mas London Group Ltd.
- Cefex Group LtdBuilders
- Claene Cleaning LtdCleaning companies
- Recca UK Cars LtdMotor traders
What happens if Mas London Group 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 11 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 12 Feb 2028 to 11 Mar 2028 | £150 |
| 1 to 3 months late | 12 Mar 2028 to 11 May 2028 | £375 |
| 3 to 6 months late | 12 May 2028 to 11 Aug 2028 | £750 |
| More than 6 months late | From 12 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
- 17210525
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 May 2026
- Registered office
- 87 Millmead Business Centre, Mill Mead Road, London, N17 9QU
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Non-specialised wholesale trade (SIC 46900)
Management consultancy activities other than financial management (SIC 70229)
Other education n.e.c. (SIC 85590) - Year end
- 31 May (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.
- Masis Design Limited2012
- Masters of Maintenance Ltd.2021
- Masters Pro Ltd2026
- Mastico Ltd2024
- Mateo Build Ltd2025
- Matergroup Ltd2016
- Material Concepts Limited2011
- Material Share Ltd2024
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Mas London Group Ltd's accounts due?
Mas London Group Ltd's next accounts are due at Companies House by 11 February 2028 (in 486 days), covering the period to 31 May 2027.
When is Mas London Group 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 10 May 2027, due by 10 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 Mas London Group Ltd still trading?
Mas London Group 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 Mas London Group Ltd do?
Mas London Group Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Non-specialised wholesale trade (SIC 46900); Management consultancy activities other than financial management (SIC 70229); Other education n.e.c. (SIC 85590).
How old is Mas London Group Ltd?
Mas London Group Ltd was incorporated on 11 May 2026, less than a year ago.
What is the penalty if Mas London Group 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 Mas London Group 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.