- Companies
- Groundworks and demolition
- Cardiff
- Denver Drilling Services Limited
Denver Drilling Services Limited
- Company number
- 07500159
- Incorporated
- 20 Jan 201115 years trading
- Registered office
- Guardian House Capital Business Park, Wentloog, Cardiff, South Glamorgan, CF3 2PZ
- Nature of business
- Test drilling and boring
Denver Drilling Services Limited is a 15-year-old private limited company registered in Cardiff, company number 07500159, one of 14 groundworks and demolition companies in Cardiff. 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.
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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 £56K (+22.9%) on the year before, to £300K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £336K against £90K owed within a year: 3.7 times cover.
- 10 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Dec 2025 | £300K | £42K | £336K | £90K | 10 |
| 31 Dec 2024 | £244K | £44K | £319K | £125K | 10 |
| 31 Dec 2023 | £116K | £14K | £178K | £104K | 10 |
| 31 Dec 2022 | £128K | £248K | £157K | 9 | |
| 31 Dec 2021 | £11K | £202K | £221K | 11 | |
| 31 Dec 2020 | £18K | £269K | £272K | 14 | |
| 31 Dec 2019 | -£13K | £199K | £261K | 10 | |
| 31 Dec 2018 | £12K | £211K | £240K | ||
| 31 Dec 2017 | £30K | £254K | £262K | ||
| 31 Dec 2016 | £5,736 | £256K | £287K |
Who runs and owns Denver Drilling Services Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| A*** J*** | Director | Jan 2020 |
| D*** R*** | Director | Jun 2023 |
| A*** J*** | Secretary | Sep 2025 |
3 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| J*** M*** | Secretary | Jan 2011 | Sep 2025 |
| A*** M*** | Director | Jan 2011 | Dec 2023 |
| J*** M*** | Director | Jan 2011 | Dec 2025 |
Person with significant control
Where Denver Drilling Services Limited is registered
The registered office is in Cardiff (CF3), in the Cardiff local authority area, Wales. Show CF3 2PZ on a map.
Other trade companies in CF3
- Ions Trade & Projects LtdInstallers
- Fly Tech LtdMachinery repair and installation
- Dragonfly Site Services LtdSpecialist contractors
- Arc Energy Systems LtdElectricians
- Floyd’S Consultants LtdProperty developers
- Blues Mechanical LtdInstallers
- Climate Control Cardiff LtdPlumbers and heating engineers
- Campo & Co Developments LtdBuilders
What happens if Denver Drilling Services 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 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
- 07500159
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 January 2011 (15 years ago)
- Registered office
- Guardian House Capital Business Park, Wentloog, Cardiff, South Glamorgan, CF3 2PZ
- Nature of business
- Test drilling and boring (SIC 43130)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 1 May 2026
Filing notes for groundworks and demolition companies
Groundworks and demolition companies tend to own heavy plant, so capital allowances and hire purchase liabilities show up in both the accounts and the CT600.
Similar companies in Cardiff
Other active groundworks and demolition companies registered in Cardiff.
- Fowler Demolition Ltd2024
- Nazzy Enterprise Limited2011
- Newport Land Reclamation Limited2011
- R.S. Construction Demolition and Groundworks Ltd2020
- RD Sandhu Groundwork Ltd2025
- Right Kijani Sokom Limited2025
- South Wales Demolition Ltd2010
- Trevett Groundwork's Ltd2026
All groundworks and demolition companies in Cardiff · All trades in Cardiff · Groundworks and demolition across the UK
Frequently asked questions
When are Denver Drilling Services Limited's accounts due?
Denver Drilling Services Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Denver Drilling Services Limited'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 Denver Drilling Services Limited still trading?
Denver Drilling Services 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 Denver Drilling Services Limited do?
Denver Drilling Services Limited is registered under Test drilling and boring (SIC 43130).
How old is Denver Drilling Services Limited?
Denver Drilling Services Limited was incorporated on 20 January 2011, 15 years ago.
Who runs Denver Drilling Services Limited?
Denver Drilling Services Limited has 2 active directors, the longest-serving appointed in Jan 2020. Their names and service addresses are on the Companies House register.
Who owns Denver Drilling Services Limited?
One person or company has significant control of Denver Drilling Services Limited: Major Construction Services Limited (owns 75% or more of the shares).
What is the penalty if Denver Drilling Services 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 Denver Drilling Services 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.