- Companies
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- Milford Haven
- J4 Groundworks Ltd
J4 Groundworks Ltd
- Company number
- 14886545
- Incorporated
- 22 May 20233 years trading
- Registered office
- 25 Starbuck Road, Milford Haven, SA73 2BB
- Nature of business
- Construction of domestic buildings; Construction of railways and underground railways; Construction of other civil engineering projects n.e.c.
J4 Groundworks Ltd is a 3-year-old private limited company registered in Milford Haven, company number 14886545, one of 18 building contractors in Milford Haven. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 2028.
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 £2,114 (-7.1%) on the year before, to £28K.
- Current assets of £40K against £9,947 owed within a year: 4.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2024 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | £28K | £40K | £9,947 | 0 | |
| 31 May 2025 | £30K | £59K | £29K | 0 | |
| 31 May 2024 | £22K | £41K | £20K | 0 |
Where J4 Groundworks Ltd is registered
The registered office is in Milford Haven (SA73), in the Pembrokeshire local authority area, Wales. Show SA73 2BB on a map.
Other trade companies in SA73
- An Construction & Maintenance LtdBuilders
- Haven Coast Group Developments 1 LtdProperty developers
- Pembs Ice Blasting LtdCleaning companies
- Haven Coast Group LimitedProperty developers
- MR GS Mobile Tyres LtdMechanics and garages
- WBG Facilities LimitedScaffolders
- HW Builders LtdBuilders
- Pro Scaffolding Pembs LtdScaffolders
What happens if J4 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 2029 | 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
- 14886545
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 May 2023 (3 years ago)
- Registered office
- 25 Starbuck Road, Milford Haven, SA73 2BB
- Nature of business
- Construction of domestic buildings (SIC 41202)
Construction of railways and underground railways (SIC 42120)
Construction of other civil engineering projects n.e.c. (SIC 42990) - Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 21 May 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Milford Haven
Other active building contractors registered in Milford Haven.
- Lgreggain & Company Limited2002
- NJS Groundworks & Civils Ltd2025
- P & C Construction Pembs Ltd2024
- P K Specialist Services Ltd2021
- Pembrokeshire Building & Plumbing Supplies Limited2012
- Red Building Services Limited2016
- S.J.Sutton Construction Limited2013
- Tree & Sons Limited2004
All building contractors in Milford Haven · All trades in Milford Haven · Builders across the UK
Frequently asked questions
When are J4 Groundworks Ltd's accounts due?
J4 Groundworks Ltd's next accounts are due at Companies House by 29 February 2028 (in 504 days), covering the period to 31 May 2027.
When is J4 Groundworks Ltd's CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is J4 Groundworks Ltd still trading?
J4 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 J4 Groundworks Ltd do?
J4 Groundworks Ltd is registered under Construction of domestic buildings (SIC 41202); Construction of railways and underground railways (SIC 42120); Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is J4 Groundworks Ltd?
J4 Groundworks Ltd was incorporated on 22 May 2023, 3 years ago.
What is the penalty if J4 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 J4 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.