- Companies
- Groundworks and demolition
- CMK Groundworks Ltd
CMK Groundworks Ltd
- Company number
- SC664118
- Incorporated
- 15 Jun 20206 years trading
- Registered office
- The Old Surgery, School Road, Tarbert, PA29 6UL
- Nature of business
- Site preparation
CMK Groundworks Ltd is a 6-year-old private limited company registered in Tarbert, company number SC664118, one of the UK's groundworks and demolition companies. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 CMK Groundworks 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 £13K (-263.5%) on the year before, to -£7,955.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £89K against £96K owed within a year: 0.9 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£7,955 | £89K | £96K | 3 | |
| 30 Jun 2024 | £4,864 | £157K | £216K | 3 | |
| 30 Jun 2023 | £3,286 | £275K | £298K | 1 | |
| 30 Jun 2022 | £960 | £140K | £149K | 1 | |
| 30 Jun 2021 | £516 | £47K | £58K | 1 |
Where CMK Groundworks Ltd is registered
The registered office is in Tarbert (PA29), in the Argyll and Bute local authority area, Scotland. Show PA29 6UL on a map.
Other trade companies in PA29
- Fyne Towing LtdMechanics and garages
- John Martin Joinery LtdJoiners and carpenters
- Amek Joinery LtdInstallers
- Corranbuie Contracts LtdCivil engineering
- Caledonia Drilling LimitedGroundworks and demolition
- JMK Mechanical Services LtdMachinery repair and installation
- CN Vehicle Services LtdMotor traders
- Grant Developments LtdBuilders
Also registered at this address
16 other companies use the same registered office as CMK Groundworks Ltd.
- Amek Joinery LtdInstallers
- Ape Solutions LtdMachinery repair and installation
- Arduaine Farm Services LtdCivil engineering
- Argyll Heating LtdPlumbers and heating engineers
- Barbreck Joinery & Construction LtdBuilders
- Duncan Macgregor Joiners & Builders LtdBuilders
- J McLellan & Sons LtdBuilders
- John Martin Joinery LtdJoiners and carpenters
- K R (Argyll) LtdBuilders
- KCS (Argyll) Ltd.Builders
- Laura-Kim Properties LimitedProperty developers
- Linnmont LimitedBuilders
- McEachern Bros Construction LtdBuilders
- NDT & Quality Services LimitedMachinery repair and installation
- S Macdonald Builders LtdBuilders
- Wind Turbine Services (UK) LtdMachinery repair and installation
What happens if CMK Groundworks 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- SC664118
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 June 2020 (6 years ago)
- Registered office
- The Old Surgery, School Road, Tarbert, PA29 6UL
- Nature of business
- Site preparation (SIC 43120)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 14 June 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
Other active groundworks and demolition companies.
Frequently asked questions
When are CMK Groundworks Ltd's accounts due?
CMK Groundworks Ltd's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is CMK Groundworks Ltd's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is CMK Groundworks Ltd still trading?
CMK Groundworks 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 CMK Groundworks Ltd do?
CMK Groundworks Ltd is registered under Site preparation (SIC 43120).
How old is CMK Groundworks Ltd?
CMK Groundworks Ltd was incorporated on 15 June 2020, 6 years ago.
What is the penalty if CMK Groundworks 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 CMK Groundworks 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.