- Companies
- Plumbers and heating engineers
- London
- Mazel Blue Limited
Mazel Blue Limited
- Company number
- 16803512
- Incorporated
- 22 Oct 2025
- Registered office
- 20 Westerham Avenue, London, N9 9BU
- Nature of business
- Plumbing, heat and air-conditioning installation
Mazel Blue Limited is a newly incorporated private limited company registered in London, company number 16803512, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 22 July 2027, and its first CT600 is due at HMRC on 21 October 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 Mazel Blue Limited is registered
The registered office is in London (N9), in the Enfield local authority area, London. Show N9 9BU on a map.
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Also registered at this address
5 other companies use the same registered office as Mazel Blue Limited.
- Advanced Design & Display LimitedMachinery repair and installation
- Biznetic LimitedMotor traders
- Masterful Build LimitedBuilders
- Sirwan Property Investments LtdProperty developers
- Surucu Property Services LimitedSpecialist contractors
What happens if Mazel Blue Limited 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 22 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Jul 2027 to 22 Aug 2027 | £150 |
| 1 to 3 months late | 23 Aug 2027 to 22 Oct 2027 | £375 |
| 3 to 6 months late | 23 Oct 2027 to 22 Jan 2028 | £750 |
| More than 6 months late | From 23 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 16803512
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 October 2025
- Registered office
- 20 Westerham Avenue, London, N9 9BU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in London
Other active plumbing and heating companies registered in London.
- Mazi Plumbing and Heating Ltd2026
- MB Air Conditioning Service Ltd2025
- Mbi Plumbing and Heating Limited2018
- Mbi Plumbing Ltd2022
- MBN Plumbers Ltd2016
- MC Mechanical Cooling Ltd2025
- MC Plumbing & Heating Limited2013
- McAdams Gas and Heating Ltd2025
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Mazel Blue Limited's accounts due?
Mazel Blue Limited's next accounts are due at Companies House by 22 July 2027 (in 283 days), covering the period to 31 October 2026.
When is Mazel Blue Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 21 October 2026, due by 21 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mazel Blue Limited still trading?
Mazel Blue Limited 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 Mazel Blue Limited do?
Mazel Blue Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Mazel Blue Limited?
Mazel Blue Limited was incorporated on 22 October 2025, less than a year ago.
What is the penalty if Mazel Blue Limited 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 Mazel Blue Limited 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.