- Companies
- Specialist contractors
- York
- Onyx Building Ltd
Onyx Building Ltd
- Company number
- 15026541
- Incorporated
- 25 Jul 20233 years trading
- Registered office
- 67 Tudor Road, York, North Yorkshire, YO24 3AY
- Nature of business
- Other specialised construction activities n.e.c.
Onyx Building Ltd is a 3-year-old private limited company registered in York, company number 15026541, one of 101 specialist construction companies in York. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £25K (-123.6%) on the year before, to -£4,828.
- Current assets of £45K against £75K owed within a year: 0.6 times cover.
- 3 employees on average, up from 0 the year before.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | -£4,828 | £45K | £75K | 3 | |
| 31 Mar 2024 | £20K | £31K | £18K | 0 |
Where Onyx Building Ltd is registered
The registered office is in York (YO24), in the York local authority area, Yorkshire and The Humber. Show YO24 3AY on a map.
Other trade companies in YO24
- LFK Cleaning LtdCleaning companies
- That Little Job LtdFinishing trades
- Mackley Roofing & Leadwork LtdRoofers
- Halo Brickwork LtdProperty developers
- Flo-Rite Draincare & Plumbing LtdPlumbers and heating engineers
- Oven Clean of North Yorkshire LimitedCleaning companies
- RB Electrical York LtdElectricians
- L.I.K.E Electrical York LimitedMachinery repair and installation
What happens if Onyx Building 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
- 15026541
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 July 2023 (3 years ago)
- Registered office
- 67 Tudor Road, York, North Yorkshire, YO24 3AY
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 21 July 2026
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 York
Other active specialist construction companies registered in York.
- Osw Projects Ltd2012
- Overryd Ltd2013
- PBS (Yorkshire) Limited2008
- Pillarstone Inspections Ltd2026
- Pinnacle Conservation Limited2019
- Pumpcon Ltd2022
- Pumpline Ltd2017
- PWS Technical Services (UK) Ltd2011
All specialist construction companies in York · All trades in York · Specialist contractors across the UK
Frequently asked questions
When are Onyx Building Ltd's accounts due?
Onyx Building 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 Onyx Building Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Onyx Building Ltd still trading?
Onyx Building 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 Building Ltd do?
Onyx Building Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Onyx Building Ltd?
Onyx Building Ltd was incorporated on 25 July 2023, 3 years ago.
What is the penalty if Onyx Building 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 Building 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.