- Companies
- Property developers
- London
- Thornycroft Construction Limited
Thornycroft Construction Limited
- Company number
- 12590971
- Incorporated
- 7 May 20206 years trading
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Development of building projects; Construction of domestic buildings
Thornycroft Construction Limited is a 6-year-old private limited company registered in London, company number 12590971, one of 14,100 property development companies in London. Companies House shows its accounts as overdue: they were due on 27 May 2026.
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 unchanged on the year before, at -£73K.
- Net assets rose in 0 of 3 year-on-year comparisons on record.
- Current assets of £100 against £143K owed within a year: 0.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 4 years, 2021 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2024 | -£73K | £100 | £143K | 1 | |
| 31 May 2023 | -£73K | £100 | £143K | 1 | |
| 31 May 2022 | £100 | £100 | 0 | ||
| 31 May 2021 | £100 | £100 | 1 |
Where Thornycroft Construction Limited is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
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- Magic Door Services LimitedMachinery repair and installation
Shared registered office
1,583 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 Thornycroft Construction Limited files late
If the accounts reach Companies House today, the late filing penalty is £750 (£1,500 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 May 2026 to 27 Jun 2026 | £150 |
| 1 to 3 months late | 28 Jun 2026 to 27 Aug 2026 | £375 |
| 3 to 6 months late | 28 Aug 2026 to 27 Nov 2026 | £750 |
| More than 6 months late | From 28 Nov 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 28 Aug 2026 | £200 |
| 3 months late | 27 Nov 2026 | another £200 |
| 6 months late | 27 Feb 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 27 Aug 2027 | 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
- 12590971
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 May 2020 (6 years ago)
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Development of building projects (SIC 41100)
Construction of domestic buildings (SIC 41202) - Year end
- 28 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2024
- Last confirmation statement
- 6 May 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- Thorpe Bros.(Properties)Limited1935
- Thorstone Securities Limited1989
- Three Keys Developments Limited2026
- Three Keys Group Limited2026
- Three Little Pigs Properties Ltd.2015
- Three Peaks Estates Ltd2026
- Three Rivers (London) Limited1999
- Threebells Limited2026
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Thornycroft Construction Limited's accounts due?
Thornycroft Construction Limited's accounts were due at Companies House on 27 May 2026 and the register shows them as overdue.
When is Thornycroft Construction Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 May 2025, due by 31 May 2026, and one for the period to 27 August 2025, due by 27 August 2026. Corporation tax is payable 9 months and 1 day after the end of each.
Is Thornycroft Construction Limited still trading?
Thornycroft Construction 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 Thornycroft Construction Limited do?
Thornycroft Construction Limited is registered under Development of building projects (SIC 41100); Construction of domestic buildings (SIC 41202).
How old is Thornycroft Construction Limited?
Thornycroft Construction Limited was incorporated on 7 May 2020, 6 years ago.
What is the penalty if Thornycroft 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 Thornycroft Construction 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.