- Companies
- Plumbers and heating engineers
- London
- Mason Fire Ltd
Mason Fire Ltd
- Company number
- 13821161
- Incorporated
- 29 Dec 20214 years trading
- Registered office
- 66 ST. Mary's Road, London, E13 9AD
- Nature of business
- Plumbing, heat and air-conditioning installation
Mason Fire Ltd is a 4-year-old private limited company registered in London, company number 13821161, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 December 2026, and its first CT600 is due at HMRC on 31 December 2026.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £50K (-114.9%) on the year before, to -£6,465.
- Current assets of £30K against £31K owed within a year: 1.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 3 years, 2022 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2024 | -£6,465 | £30K | £31K | 1 | |
| 31 Dec 2023 | £43K | £72K | £20K | 1 | |
| 31 Dec 2022 | £55K | £84K | £29K | 0 |
Where Mason Fire Ltd is registered
The registered office is in London (E13), in the Newham local authority area, London. Show E13 9AD on a map.
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What happens if Mason Fire 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 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 | 31 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
- 13821161
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 December 2021 (4 years ago)
- Registered office
- 66 ST. Mary's Road, London, E13 9AD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 28 December 2025
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.
- Mason Plumbing & Heating (Essex) Ltd2014
- Master Bathrooms Limited2011
- Master Heating and Plumbing Ltd2026
- Master Interior Construction Ltd2024
- Master Plumbers Ltd2017
- Master Rotors Mir Ltd2026
- Mati Services Ltd2023
- Mato Mechanical Services Ltd2026
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Mason Fire Ltd's accounts due?
Mason Fire Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Mason Fire 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 December 2025, due by 31 December 2026, and one for the period to 31 March 2026, due by 31 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mason Fire Ltd still trading?
Mason Fire 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 Mason Fire Ltd do?
Mason Fire Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Mason Fire Ltd?
Mason Fire Ltd was incorporated on 29 December 2021, 4 years ago.
What is the penalty if Mason Fire 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 Mason Fire 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.