- Companies
- Civil engineering
- London
- Lencon Construction Ltd
Lencon Construction Ltd
- Company number
- 12741973
- Incorporated
- 14 Jul 20206 years trading
- Registered office
- Hamilton House Dunne & Waterman, 1 Temple Avenue, London, EC4Y 0HA
- Nature of business
- Construction of other civil engineering projects n.e.c.
Lencon Construction Ltd is a 6-year-old private limited company registered in London, company number 12741973, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 March 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 £304K (+57.5%) on the year before, to £833K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £780K against £320K owed within a year: 2.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £833K | £653K | £780K | £320K | 1 |
| 31 Mar 2024 | £529K | £390K | £554K | £364K | 1 |
| 31 Mar 2023 | £266K | £208K | £419K | £219K | 1 |
| 31 Mar 2022 | £238K | £209K | £396K | £225K | 2 |
| 31 Mar 2021 | £279K | £201K | £514K | £265K | 2 |
Where Lencon Construction Ltd is registered
The registered office is in London (EC4Y), in the City of London local authority area, London. Show EC4Y 0HA on a map.
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What happens if Lencon 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Mar 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Mar 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
- 12741973
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 July 2020 (6 years ago)
- Registered office
- Hamilton House Dunne & Waterman, 1 Temple Avenue, London, EC4Y 0HA
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 13 July 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 London
Other active civil engineering contractors registered in London.
- Lennon Civil Engineering Limited2011
- Letsymply Ground Ltd2023
- LF Telecoms Ltd2023
- Liban Works Ltd2025
- Lidsey Renewables Limited2019
- Lift Installation and Servicing Ltd2021
- Light Connect Ltd2025
- Lily and Jack Fabrications Ltd2026
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are Lencon Construction Ltd's accounts due?
Lencon Construction Ltd's next accounts are due at Companies House by 30 December 2026 (in 79 days), covering the period to 30 March 2026.
When is Lencon Construction Ltd's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is Lencon Construction Ltd still trading?
Lencon 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 Lencon Construction Ltd do?
Lencon Construction Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Lencon Construction Ltd?
Lencon Construction Ltd was incorporated on 14 July 2020, 6 years ago.
What is the penalty if Lencon 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 Lencon 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.