- Companies
- Civil engineering
- Caerphilly
- F Mills Limited
F Mills Limited
- Company number
- 11530890
- Incorporated
- 22 Aug 20188 years trading
- Registered office
- 5 Southpandy Road, Caerphilly, CF83 3HS
- Nature of business
- Construction of utility projects for electricity and telecommunications
F Mills Limited is a 8-year-old private limited company registered in Caerphilly, company number 11530890, one of 16 civil engineering contractors in Caerphilly. 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 up £4,167 (+89.3%) on the year before, to £8,832.
- Current assets of £2,588 against £8,639 owed within a year: 0.3 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £8,832 | £2,588 | £8,639 | 1 | |
| 31 Dec 2024 | £4,665 | £32K | £20K | 1 |
Where F Mills Limited is registered
The registered office is in Caerphilly (CF83), in the Caerphilly local authority area, Wales. Show CF83 3HS on a map.
Other trade companies in CF83
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- Bee Green Plumbing Solutions LtdPlumbers and heating engineers
- Tyga Constuction LimitedBuilders
- Grip Rip MX LtdMotor traders
- Da' Grave LtdRepair services
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What happens if F Mills 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
- 11530890
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 August 2018 (8 years ago)
- Registered office
- 5 Southpandy Road, Caerphilly, CF83 3HS
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 21 August 2024
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 Caerphilly
Other active civil engineering contractors registered in Caerphilly.
- Grange Industries Group Limited2016
- Hallventure Limited1982
- J G E Utilities Ltd2026
- JTG Civils Concrete Reinforcement Ltd2025
- M & M Concrete Reinforcement Ltd2018
- MJ Management Services Ltd2018
- Ram Plant Ltd2022
- RTR Consultancy Services Limited2021
All civil engineering contractors in Caerphilly · All trades in Caerphilly · Civil engineering across the UK
Frequently asked questions
When are F Mills Limited's accounts due?
F Mills 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 F Mills 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 F Mills Limited still trading?
F Mills Limited is listed as active on the Companies House register (checked 13 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 F Mills Limited do?
F Mills Limited is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is F Mills Limited?
F Mills Limited was incorporated on 22 August 2018, 8 years ago.
What is the penalty if F Mills 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 F Mills Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.