- Companies
- Specialist contractors
- London
- Onyx LDN Limited
Onyx LDN Limited
- Company number
- 10111791
- Incorporated
- 8 Apr 201610 years trading
- Registered office
- Lu 328 the Light Bulb, 1 Filament Walk, London, SW18 4GQ
- Nature of business
- Other specialised construction activities n.e.c.; specialised design activities
Onyx LDN Limited is a 10-year-old private limited company registered in London, company number 10111791, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 up £299K on the year before, to £321K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £982K against £705K owed within a year: 1.4 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £321K | £770K | £982K | £705K | 0 |
| 30 Nov 2024 | £21K | £122K | £383K | £338K | 1 |
| 30 Nov 2023 | £3,737 | £364K | £325K | 1 | |
| 30 Nov 2022 | £19K | £399K | £339K | 1 | |
| 30 Nov 2021 | £42K | £269K | £179K | 1 | |
| 30 Nov 2020 | £84K | £232K | £98K | 1 | |
| 30 Nov 2019 | £25K | £194K | £169K | ||
| 30 Nov 2018 | £12K | £51K | £39K | ||
| 30 Nov 2017 | £28K | £30K | £60K | ||
| 30 Nov 2016 | £100 |
Where Onyx LDN Limited is registered
The registered office is in London (SW18), in the Wandsworth local authority area, London. Show SW18 4GQ on a map.
Other trade companies in SW18
- Altius 24CHT LimitedProperty developers
- Nexlink Technologies LtdElectricians
- Straightedge Builders LtdProperty developers
- Parsons Green Re Design & Build LimitedProperty developers
- Home Appliances Repair LimitedRepair services
- 34 & 34A Lambrook Terrace Freehold LtdProperty developers
- 30 Thorndean LtdProperty developers
- Fircroft Group LimitedProperty developers
What happens if Onyx LDN 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 31 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 10111791
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 April 2016 (10 years ago)
- Registered office
- Lu 328 the Light Bulb, 1 Filament Walk, London, SW18 4GQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
specialised design activities (SIC 74100) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 16 July 2026
- Previous names
- Onyx Residential Ltd (until 24 Apr 2019)
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.
- Op Steel Ltd2026
- Open Building Systems Ltd2002
- Oppong Company Limited2020
- Opr Construction Ltd2020
- Oprea Build Ltd2019
- Optic Software Ltd2025
- Optimal Parking Solutions Limited2017
- Options Joinery Ltd2020
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Onyx LDN Limited's accounts due?
Onyx LDN Limited's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Onyx LDN Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Onyx LDN Limited still trading?
Onyx LDN 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 Onyx LDN Limited do?
Onyx LDN Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); specialised design activities (SIC 74100).
How old is Onyx LDN Limited?
Onyx LDN Limited was incorporated on 8 April 2016, 10 years ago.
What is the penalty if Onyx LDN 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 Onyx LDN 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.