- Company number
- 12487500
- Incorporated
- 27 Feb 20206 years trading
- Registered office
- 52 High Street, Pinner, HA5 5PW
- Nature of business
- Construction of domestic buildings
Thorium Construction Limited is a 6-year-old private limited company registered in Pinner, company number 12487500, one of 110 building contractors in Pinner. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 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 £5,292 (+26.2%) on the year before, to £25K.
- Net assets rose in 4 of 4 year-on-year comparisons on record.
- Current assets of £51K against £26K owed within a year: 2.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 | £25K | £13K | £51K | £26K | 0 |
| 28 Feb 2024 | £20K | £6,827 | £43K | £23K | 1 |
| 28 Feb 2023 | £20K | £17K | £39K | £18K | 1 |
| 28 Feb 2022 | £839 | £12K | £26K | £25K | 1 |
| 28 Feb 2021 | £171 | £22K | £22K | 1 |
Who runs and owns Thorium Construction Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| G*** E*** | Director | Feb 2020 |
Person with significant control
Where Thorium Construction Limited is registered
The registered office is in Pinner (HA5), in the Harrow local authority area, London. Show HA5 5PW on a map.
Other trade companies in HA5
- Elisop LtdCivil engineering
- Kite Property Management LtdBuilders
- Olivares and Hayter LtdSpecialist contractors
- Shallons Electrical LtdElectricians
- Executive Maintenance LtdFinishing trades
- Truspan LtdBuilders
- Mak Electrical Services LtdBuilders
- Bori Scaffolding LtdScaffolders
Shared registered office
35 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Thorium Construction 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 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 | 1 Apr 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 | 31 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
- 12487500
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 February 2020 (6 years ago)
- Registered office
- 52 High Street, Pinner, HA5 5PW
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 26 February 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 Pinner
Other active building contractors registered in Pinner.
- Torsion Building Services Ltd2019
- Truspan Ltd2026
- Varsha Construction Ltd2026
- We Shall Construstion Ltd2024
- Woodman & Blount Limited1978
- Y&D Construction Ltd2023
- Yhd Investments 1 Ltd2023
- A Build & Construction Ltd2025
All building contractors in Pinner · All trades in Pinner · Builders across the UK
Frequently asked questions
When are Thorium Construction Limited's accounts due?
Thorium Construction Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Thorium Construction Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Thorium Construction Limited still trading?
Thorium Construction 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 Thorium Construction Limited do?
Thorium Construction Limited is registered under Construction of domestic buildings (SIC 41202).
How old is Thorium Construction Limited?
Thorium Construction Limited was incorporated on 27 February 2020, 6 years ago.
Who runs Thorium Construction Limited?
Thorium Construction Limited has 1 active director, the longest-serving appointed in Feb 2020. Their names and service addresses are on the Companies House register.
Who owns Thorium Construction Limited?
One person or company has significant control of Thorium Construction Limited: an individual (has significant influence or control).
What is the penalty if Thorium Construction 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 Thorium Construction 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.