- Companies
- Civil engineering
- Mountain Ash
- JWG Utilities Limited
JWG Utilities Limited
- Company number
- 11009357
- Incorporated
- 12 Oct 20179 years trading
- Registered office
- 23 Park Street, Abercynon, Mountain Ash, CF45 4PF
- Nature of business
- Construction of other civil engineering projects n.e.c.
JWG Utilities Limited is a 9-year-old private limited company registered in Mountain Ash, company number 11009357, one of 12 civil engineering contractors in Mountain Ash. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £6,339 (-83.7%) on the year before, to £1,231.
- Net assets rose in 2 of 3 year-on-year comparisons on record.
- Current assets of £33K against £30K owed within a year: 1.1 times cover.
- 2 employees 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 Oct 2025 | £1,231 | £33K | £30K | 2 | |
| 31 Oct 2024 | £7,570 | £32K | £23K | 2 | |
| 31 Oct 2023 | £4,708 | £10K | £66K | £60K | 2 |
| 31 Oct 2022 | -£8,199 | £2,095 | £32K | £36K | 2 |
Where JWG Utilities Limited is registered
The registered office is in Mountain Ash (CF45), in the Rhondda Cynon Taf local authority area, Wales. Show CF45 4PF on a map.
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What happens if JWG Utilities 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 31 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 11009357
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 October 2017 (9 years ago)
- Registered office
- 23 Park Street, Abercynon, Mountain Ash, CF45 4PF
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 15 December 2025
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 Mountain Ash
Other active civil engineering contractors registered in Mountain Ash.
- Marton (Civil Engineering) Limited1976
- MDF Rail Limited2016
- Prizm Engineering Ltd2025
- R Lewis Rail Services Limited2014
- Air Jointing Limited2026
- C&M Jones Groundworks Limited2020
- Dan Rail Welding Ltd2020
- DSR Groundworks Ltd2015
All civil engineering contractors in Mountain Ash · All trades in Mountain Ash · Civil engineering across the UK
Frequently asked questions
When are JWG Utilities Limited's accounts due?
JWG Utilities Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is JWG Utilities Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is JWG Utilities Limited still trading?
JWG Utilities 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 JWG Utilities Limited do?
JWG Utilities Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is JWG Utilities Limited?
JWG Utilities Limited was incorporated on 12 October 2017, 9 years ago.
What is the penalty if JWG Utilities 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 JWG Utilities 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.