- Companies
- Property developers
- London
- Sinclair Cavendish Limited
Sinclair Cavendish Limited
- Company number
- 01349568
- Incorporated
- 23 Jan 197848 years trading
- Registered office
- First Floor, Winston House, 349 Regents Park Road, London, N3 1DH
- Nature of business
- Development of building projects
Sinclair Cavendish Limited is a 48-year-old private limited company registered in London, company number 01349568, one of 14,100 property development companies in London. 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 £2,636 (+0.2%) on the year before, to £1.1M.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £67K against £91K owed within a year: 0.7 times cover.
- 4 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Mar 2025 | £1.1M | £47K | £67K | £91K | 4 |
| 31 Mar 2024 | £1.1M | £40K | £62K | £88K | 4 |
| 31 Mar 2023 | £1.1M | £46K | £68K | £86K | 4 |
| 31 Mar 2022 | £1.1M | £53K | £72K | £101K | 4 |
| 31 Mar 2021 | £1.1M | £52K | £64K | £84K | 4 |
| 31 Mar 2020 | £1.1M | £38K | £53K | £80K | 4 |
| 31 Mar 2019 | £1.1M | £50K | £55K | £78K | 4 |
| 31 Mar 2018 | £1.2M | £35K | £52K | £58K | 4 |
| 31 Mar 2017 | £1.1M | £34K | £46K | £61K | 4 |
| 31 Mar 2016 | £1.1M | £35K |
Where Sinclair Cavendish Limited is registered
The registered office is in London (N3), in the Barnet local authority area, London. Show N3 1DH on a map.
Other trade companies in N3
- Key & Keep LtdCleaning companies
- GMS Residential LimitedPlumbers and heating engineers
- Gcap East LtdProperty developers
- Tatras Development LimitedProperty developers
- Chesterfield Corinne LtdProperty developers
- Pure Plumbing Pros LimitedPlumbers and heating engineers
- WS Cleaning Services LtdCleaning companies
- Landfall Projects LimitedProperty developers
Shared registered office
73 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 Sinclair Cavendish 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
- 01349568
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 January 1978 (48 years ago)
- Registered office
- First Floor, Winston House, 349 Regents Park Road, London, N3 1DH
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 31 July 2026
- Charges (mortgages)
- 3 outstanding of 3 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.
- Singh Brothers Properties Ltd2025
- Singlestrand Limited1987
- Sinoff Limited2025
- Sinowest Construction Group Ltd2022
- Sinowest Developments Ltd2005
- Sir William Burnett Properties Limited2001
- Sirrah Property Management Limited2022
- Siruben Estates Limited1999
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Sinclair Cavendish Limited's accounts due?
Sinclair Cavendish 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 Sinclair Cavendish 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 Sinclair Cavendish Limited still trading?
Sinclair Cavendish 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 Sinclair Cavendish Limited do?
Sinclair Cavendish Limited is registered under Development of building projects (SIC 41100).
How old is Sinclair Cavendish Limited?
Sinclair Cavendish Limited was incorporated on 23 January 1978, 48 years ago.
What is the penalty if Sinclair Cavendish 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 Sinclair Cavendish 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.