- Companies
- Civil engineering
- Kingswinford
- Onyx Utilities Ltd
Onyx Utilities Ltd
- Company number
- 10376130
- Incorporated
- 15 Sep 201610 years trading
- Registered office
- 32 High Street, Wall Heath, Kingswinford, DY6 0HB
- Nature of business
- Construction of other civil engineering projects n.e.c.
Onyx Utilities Ltd is a 10-year-old private limited company registered in Kingswinford, company number 10376130, one of 25 civil engineering contractors in Kingswinford. 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 up £26K (+64.2%) on the year before, to £67K.
- Net assets rose in 4 of 7 year-on-year comparisons on record.
- Current assets of £212K against £137K owed within a year: 1.5 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 8 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £67K | £7,995 | £212K | £137K | 2 |
| 31 Mar 2024 | £41K | £225K | £159K | 2 | |
| 31 Mar 2023 | £2,476 | £138K | £118K | 2 | |
| 31 Mar 2022 | £3,338 | £146K | £123K | 2 | |
| 30 Sep 2020 | £1,263 | £131K | £95K | 2 | |
| 30 Sep 2019 | £8,250 | £76K | £68K | 2 | |
| 30 Sep 2018 | £16K | £74K | £57K | 2 | |
| 30 Sep 2017 | £15K | £55K | £39K |
Where Onyx Utilities Ltd is registered
The registered office is in Kingswinford (DY6), in the Dudley local authority area, West Midlands. Show DY6 0HB on a map.
Other trade companies in DY6
- KP Utilities LtdCivil engineering
- L&J Pipelines LtdSpecialist contractors
- Avey Construction LimitedBuilders
- V&V Pipelines LtdSpecialist contractors
- Birmingham No 1 LimitedProperty developers
- CJ Pipeline Services LtdSpecialist contractors
- Kingswinford Maxus LtdMechanics and garages
- Zap Electrical Systems LtdElectricians
Also registered at this address
19 other companies use the same registered office as Onyx Utilities Ltd.
- Ackerman Properties LimitedProperty developers
- Amptronik Control Systems LimitedElectricians
- Cad Scaff LimitedSpecialist contractors
- Custom Homes (Midlands) LimitedFloor and wall tilers
- Duo Developments LtdProperty developers
- Dy6 Bricklaying and Building Services LtdProperty developers
- Engine and Gearbox Centre LimitedMechanics and garages
- G T Beckley & Sons LtdProperty developers
- G.P.N. Stone & Masonry Cleaning LtdCleaning companies
- Kee Engineering LimitedMachinery repair and installation
- Kingswinford Heating LtdPlumbers and heating engineers
- M Harris & Co LimitedInstallers
- MRS Minch Cleaning Services LtdCleaning companies
- R 4 Electrical LimitedElectricians
- Reignite Heating Services LtdPlumbers and heating engineers
- Saje Property Renovations LimitedProperty developers
- Speed Data LtdSpecialist contractors
- Viking Mezzanine LimitedInstallers
- Zeal Facilities Management LtdCleaning companies
What happens if Onyx Utilities 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
- 10376130
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 September 2016 (10 years ago)
- Registered office
- 32 High Street, Wall Heath, Kingswinford, DY6 0HB
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 14 September 2026
- Previous names
- Konnect Utility Services Ltd (until 21 Jul 2020)
Graham & Hayes Limited (until 1 Jul 2020)
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Kingswinford
Other active civil engineering contractors registered in Kingswinford.
- Past and Present Engineering Limited2026
- R & R for Utilities Ltd2022
- Rbo Inspection Limited2020
- Reeve Utilities Ltd2025
- Rfo (Burton) Limited2024
- Sankey Group Holdings Limited2025
- SRG Utilities Ltd2024
- TH Utilities Ltd2023
All civil engineering contractors in Kingswinford · All trades in Kingswinford · Civil engineering across the UK
Frequently asked questions
When are Onyx Utilities Ltd's accounts due?
Onyx Utilities 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 Utilities 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 Utilities Ltd still trading?
Onyx Utilities 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 Utilities Ltd do?
Onyx Utilities Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Onyx Utilities Ltd?
Onyx Utilities Ltd was incorporated on 15 September 2016, 10 years ago.
What is the penalty if Onyx Utilities 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 Utilities 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.