- Companies
- Civil engineering
- Penryn
- Mono Construction Ltd
Mono Construction Ltd
- Company number
- 05137909
- Incorporated
- 26 May 200422 years trading
- Registered office
- Meadow Lodge, Rame Cross, Penryn, Cornwall, TR10 9DX
- Nature of business
- Construction of other civil engineering projects n.e.c.
Mono Construction Ltd is a 22-year-old private limited company registered in Penryn, company number 05137909, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £145K (-69.4%) on the year before, to -£353K.
- Net assets rose in 0 of 9 year-on-year comparisons on record.
- Current assets of £17K against £361K owed within a year: 0.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | -£353K | £628 | £17K | £361K | 0 |
| 29 Feb 2024 | -£209K | £1,860 | £33K | £280K | 2 |
| 28 Feb 2023 | -£175K | £13K | £17K | £271K | 3 |
| 28 Feb 2022 | -£138K | £71K | £80K | £335K | 4 |
| 28 Feb 2021 | -£110K | £35K | £47K | £307K | 4 |
| 29 Feb 2020 | -£47K | £12K | £24K | £312K | 4 |
| 28 Feb 2019 | £2,147 | £1,153 | £94K | £380K | 4 |
| 28 Feb 2018 | £58K | £17K | £248K | £525K | 4 |
| 28 Feb 2017 | £100K | £5,061 | £64K | £349K | 4 |
| 29 Feb 2016 | £139K | £9,935 | £36K | £309K |
Where Mono Construction Ltd is registered
The registered office is in Penryn (TR10), in the Cornwall local authority area, South West. Show TR10 9DX on a map.
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- Cornwall Exterior Cleaning LtdCleaning companies
- Granite Coast Property Group LimitedProperty developers
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- Salt & Stone Decorating LtdPainters and decorators
- National Charging Solutions LtdElectricians
- SP (Cornwall) LtdProperty developers
- Ironclad Roofing LimitedInstallers
What happens if Mono Construction 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 05137909
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 May 2004 (22 years ago)
- Registered office
- Meadow Lodge, Rame Cross, Penryn, Cornwall, TR10 9DX
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 26 May 2026
- Charges (mortgages)
- 0 outstanding of 1 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 Penryn
Other active civil engineering contractors registered in Penryn.
All civil engineering contractors in Penryn · All trades in Penryn · Civil engineering across the UK
Frequently asked questions
When are Mono Construction Ltd's accounts due?
Mono Construction Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Mono Construction Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Mono Construction Ltd still trading?
Mono Construction 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 Mono Construction Ltd do?
Mono Construction Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Mono Construction Ltd?
Mono Construction Ltd was incorporated on 26 May 2004, 22 years ago.
What is the penalty if Mono Construction 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 Mono Construction 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.