- Companies
- Installers
- London
- Onyx Fire Ltd
Onyx Fire Ltd
- Company number
- 13400263
- Incorporated
- 16 May 20215 years trading
- Registered office
- 10 Northwood Gardens, London, N12 9DR
- Nature of business
- Other construction installation
Onyx Fire Ltd is a 5-year-old private limited company registered in London, company number 13400263, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
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 £14K (-108.2%) on the year before, to -£1,066.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | -£1,066 | £0 | £0 | £1,066 | 1 |
| 31 May 2024 | £13K | £9,961 | £20K | £7,159 | 1 |
| 31 May 2023 | -£5,678 | £1 | £5,679 | 0 | |
| 31 May 2022 | £1 | £1 |
Where Onyx Fire Ltd is registered
The registered office is in London (N12), in the Barnet local authority area, London. Show N12 9DR on a map.
Other trade companies in N12
- Sullivan Property and Maintenance LtdFacilities management
- Mael Property Services LtdFinishing trades
- Horizon Constructors LtdProperty developers
- Alfawine Group LimitedFinishing trades
- Sam Motors Group LimitedMotor traders
- Heating on Demand LtdPlumbers and heating engineers
- Premium Electrical LtdElectricians
- Amaiya Sparks LtdCleaning companies
Also registered at this address
1 other company uses the same registered office as Onyx Fire Ltd.
- My Auto Security LtdMotor traders
What happens if Onyx 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 13400263
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 May 2021 (5 years ago)
- Registered office
- 10 Northwood Gardens, London, N12 9DR
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 15 May 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Optimal Shading Ltd2024
- Optimum Gas Solutions Ltd2026
- Orlando 65 Limited2026
- Osoubaservices Ltd2023
- Osprey Diamond Ltd2021
- Otec Gas and Plumbing Services Limited2002
- Otera Build Ltd2025
- Outbox Storage Ltd2017
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Onyx Fire Ltd's accounts due?
Onyx Fire Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Onyx Fire Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Onyx Fire Ltd still trading?
Onyx 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 Onyx Fire Ltd do?
Onyx Fire Ltd is registered under Other construction installation (SIC 43290).
How old is Onyx Fire Ltd?
Onyx Fire Ltd was incorporated on 16 May 2021, 5 years ago.
What is the penalty if Onyx 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 Onyx 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.