- Companies
- Civil engineering
- Pontyclun
- Intervention Services Limited
Intervention Services Limited
- Company number
- 04539867
- Incorporated
- 19 Sep 200224 years trading
- Registered office
- Williams House Green Park, Coed Cae Lane, Pontyclun, Llantrisant, CF72 9HG
- Nature of business
- Construction of other civil engineering projects n.e.c.
Intervention Services Limited is a 24-year-old private limited company registered in Pontyclun, company number 04539867, one of 11 civil engineering contractors in Pontyclun. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £740K (+20%) on the year before, to £4.4M.
- Net assets rose in 9 of 9 year-on-year comparisons on record.
- Current assets of £4.6M against £1.1M owed within a year: 4.0 times cover.
- 37 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £4.4M | £3.4M | £4.6M | £1.1M | 37 |
| 30 Sep 2024 | £3.7M | £3.1M | £4.1M | £1.2M | 37 |
| 30 Sep 2023 | £3.1M | £2.7M | £3.9M | £1.4M | 35 |
| 30 Sep 2022 | £2.4M | £1.9M | £3.1M | £1M | 23 |
| 30 Sep 2021 | £1.9M | £1.6M | £2.4M | £662K | 23 |
| 31 Mar 2020 | £1.4M | £734K | £1.7M | £833K | 24 |
| 31 Mar 2019 | £1.3M | £814K | £1.6M | £876K | |
| 31 Mar 2018 | £1.3M | £1.1M | £1.6M | £792K | |
| 31 Mar 2017 | £1.2M | £1.4M | £1.7M | £1M | |
| 31 Mar 2016 | £947K | £775K | £1.3M | £962K |
Where Intervention Services Limited is registered
The registered office is in Pontyclun (CF72), in the Rhondda Cynon Taf local authority area, Wales. Show CF72 9HG on a map.
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What happens if Intervention 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 04539867
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 September 2002 (24 years ago)
- Registered office
- Williams House Green Park, Coed Cae Lane, Pontyclun, Llantrisant, CF72 9HG
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 19 September 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
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 Pontyclun
Other active civil engineering contractors registered in Pontyclun.
- JF Groundworks Ltd2025
- KR Cables Ltd2025
- Linelevel Ltd2025
- M J Wilson Contracting Ltd2020
- Millstone Construction & Electrical (Wales) Limited2003
- Planesight Ltd2024
- Unwaith Eto Limited2026
- Winshall Ltd2021
All civil engineering contractors in Pontyclun · All trades in Pontyclun · Civil engineering across the UK
Frequently asked questions
When are Intervention Services Limited's accounts due?
Intervention Services Limited's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Intervention Services Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Intervention Services Limited still trading?
Intervention 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 Intervention Services Limited do?
Intervention Services Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Intervention Services Limited?
Intervention Services Limited was incorporated on 19 September 2002, 24 years ago.
What is the penalty if Intervention 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 Intervention 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.