- Company number
- 14498978
- Incorporated
- 22 Nov 20223 years trading
- Registered office
- 14 Milestone Road, Witney, OX18 3RE
- Nature of business
- Construction of domestic buildings
Onyx Build Ltd is a 3-year-old private limited company registered in Witney, company number 14498978, one of 108 building contractors in Witney. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Onyx Build LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £539 (-13.9%) on the year before, to £3,334.
- Current assets of £96K against £106K owed within a year: 0.9 times cover.
- 10 employees on average, up from 8 the year before.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £3,334 | £81K | £96K | £106K | 10 |
| 31 Dec 2024 | £3,873 | £26K | £77K | £98K | 8 |
| 31 Dec 2023 | £17K | £42K | £91K | £111K | 8 |
Where Onyx Build Ltd is registered
The registered office is in Witney (OX18), in the West Oxfordshire local authority area, South East. Show OX18 3RE on a map.
Other trade companies in OX18
- Roof Oxford LimitedBuilders
- MJ Iron & Earth Ltd.Machinery repair and installation
- King Groundwork & Landscaping LtdSpecialist contractors
- Delta London Decorate LtdPainters and decorators
- Hayes & Cole LimitedCivil engineering
- CW Construction Consultancy LtdBuilders
- 99 Problems LtdLandscapers and gardeners
- Pressed for Time Construction Cleaning LtdCleaning companies
What happens if Onyx Build 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 14498978
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 November 2022 (3 years ago)
- Registered office
- 14 Milestone Road, Witney, OX18 3RE
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 16 November 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Witney
Other active building contractors registered in Witney.
- Opalex Limited2004
- Oxwolds Ltd2023
- Park's Edge Developments Ltd2016
- Portobello Property Developments Limited2021
- Q & Q Construction Carpentry Ltd2024
- Quad Construction and Maintenance Limited2022
- Quartermain Construction Ltd2010
- Ray Hessey Limited2001
All building contractors in Witney · All trades in Witney · Builders across the UK
Frequently asked questions
When are Onyx Build Ltd's accounts due?
Onyx Build Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Onyx Build Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Onyx Build Ltd still trading?
Onyx Build 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 Build Ltd do?
Onyx Build Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Onyx Build Ltd?
Onyx Build Ltd was incorporated on 22 November 2022, 3 years ago.
What is the penalty if Onyx Build 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 Build 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.