- Companies
- Property developers
- Swansea
- CLM Groundworks Limited
CLM Groundworks Limited
- Company number
- 05479320
- Incorporated
- 13 Jun 200521 years trading
- Registered office
- 60 ST. Teilo Street, Pontarddulais, Swansea, West Glamorgan, SA4 8SY
- Nature of business
- Development of building projects
CLM Groundworks Limited is a 21-year-old private limited company registered in Swansea, company number 05479320, one of 273 property development companies in Swansea. 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 down £876 (-3.2%) on the year before, to £26K.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £37K against £11K owed within a year: 3.5 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £26K | £37K | £11K | 1 | |
| 31 Dec 2024 | £27K | £37K | £9,711 | 1 | |
| 31 Dec 2023 | £5,586 | £11K | £4,979 | 1 | |
| 31 Dec 2022 | £10K | £11K | £5,020 | 1 |
Where CLM Groundworks Limited is registered
The registered office is in Swansea (SA4), in the Swansea local authority area, Wales. Show SA4 8SY on a map.
Other trade companies in SA4
- Prometheus Scaffolding LimitedScaffolders
- Ridgewood Property Group LtdBuilders
- Trident Infrastructure Projects LtdCivil engineering
- Top Tint Vehicles Commercial & Domestic LimitedMechanics and garages
- RHV Solutions LimitedElectricians
- Bay Divers Services LtdMachinery repair and installation
- Dmo Automotive Services LtdMechanics and garages
- Biggs Contracting Services LtdBuilders
Also registered at this address
3 other companies use the same registered office as CLM Groundworks Limited.
- T & M (Scaffolding) LimitedScaffolders
- T & M Building Contractors LimitedFinishing trades
- Williams Electrical SW LtdElectricians
What happens if CLM Groundworks 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
- 05479320
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 13 June 2005 (21 years ago)
- Registered office
- 60 ST. Teilo Street, Pontarddulais, Swansea, West Glamorgan, SA4 8SY
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 13 June 2026
- Previous names
- Turner & Mabe (Groundworks) Limited (until 23 Jan 2012)
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Swansea
Other active property development companies registered in Swansea.
- Clyndu Land Ltd2026
- Coast Carpentry and Building Ltd2025
- Coity Developments SPV 1 Ltd2023
- Company ZMT Limited2019
- Concept Carpentry Solutions Ltd2016
- Concept Project Services Limited2002
- Conservative Developments Limited2012
- Cornerstone Equity Group Ltd2025
All property development companies in Swansea · All trades in Swansea · Property developers across the UK
Frequently asked questions
When are CLM Groundworks Limited's accounts due?
CLM Groundworks 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 CLM Groundworks 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 CLM Groundworks Limited still trading?
CLM Groundworks 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 CLM Groundworks Limited do?
CLM Groundworks Limited is registered under Development of building projects (SIC 41100).
How old is CLM Groundworks Limited?
CLM Groundworks Limited was incorporated on 13 June 2005, 21 years ago.
What is the penalty if CLM Groundworks 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 CLM Groundworks 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.