- Companies
- Civil engineering
- Holyhead
- Mon Civils Limited
Mon Civils Limited
- Company number
- 14793700
- Incorporated
- 11 Apr 20233 years trading
- Registered office
- British Stores 49A, Thomas Street, Holyhead, Anglesey, LL65 1RS
- Nature of business
- Construction of other civil engineering projects n.e.c.; Engineering related scientific and technical consulting activities
Mon Civils Limited is a 3-year-old private limited company registered in Holyhead, company number 14793700, one of 6 civil engineering contractors in Holyhead. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Mon Civils LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £21 (+0.1%) on the year before, to £18K.
- Current assets of £29K against £17K owed within a year: 1.7 times cover.
- 3 employees 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 |
|---|---|---|---|---|---|
| 30 Apr 2025 | £18K | £29K | £17K | 3 | |
| 30 Apr 2024 | £18K | £33K | £18K | 3 |
Where Mon Civils Limited is registered
The registered office is in Holyhead (LL65), in the Isle of Anglesey local authority area, Wales. Show LL65 1RS on a map.
Other trade companies in LL65
- Guy B Electrical LtdElectricians
- Ellis Property & Holdings LtdProperty developers
- Spotless Stay Cleaning LimitedCleaning companies
- Gwasanaethu Adeiladu Cyflawn CyfGroundworks and demolition
- Joclean’S Cleaning Company Ltd.Cleaning companies
- Arctic Blast Cleaning Solutions LtdCleaning companies
- Cybicleaningservices LtdCleaning companies
- Parkinson Plumbing and Heating LtdPlumbers and heating engineers
What happens if Mon Civils 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 14793700
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 April 2023 (3 years ago)
- Registered office
- British Stores 49A, Thomas Street, Holyhead, Anglesey, LL65 1RS
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 11 April 2026
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 Holyhead
Other active civil engineering contractors registered in Holyhead.
- NJM Engineering Surveyors Ltd2025
- True North Surveying Ltd2022
- Adeiladwyr Mon Cyf2015
- Awh Plant Limited2024
- Gardner Powerline Maintenance Limited2022
All civil engineering contractors in Holyhead · All trades in Holyhead · Civil engineering across the UK
Frequently asked questions
When are Mon Civils Limited's accounts due?
Mon Civils Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is Mon Civils Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Mon Civils Limited still trading?
Mon Civils 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 Mon Civils Limited do?
Mon Civils Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Mon Civils Limited?
Mon Civils Limited was incorporated on 11 April 2023, 3 years ago.
What is the penalty if Mon Civils 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 Mon Civils 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.