- Companies
- Civil engineering
- Middlesbrough
- C P Sinclair Limited
C P Sinclair Limited
- Company number
- 11154039
- Incorporated
- 17 Jan 20188 years trading
- Registered office
- 12 Eston Road, Lazenby, Middlesbrough, TS6 8DR
- Nature of business
- Construction of railways and underground railways
C P Sinclair Limited is a 8-year-old private limited company registered in Middlesbrough, company number 11154039, one of 101 civil engineering contractors in Middlesbrough. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for C P Sinclair LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £3,115 (-4.5%) on the year before, to £66K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £67K against £6,476 owed within a year: more than 10 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £66K | £47K | £67K | £6,476 | 1 |
| 31 Jan 2024 | £69K | £49K | £68K | £6,448 | 1 |
| 31 Jan 2023 | £69K | £48K | £69K | £10K | 1 |
| 31 Jan 2022 | £53K | £34K | £47K | £6,812 | 1 |
| 31 Jan 2021 | £42K | £19K | £32K | £5,263 | 1 |
| 31 Jan 2020 | £18K | £20K | £24K | £6,258 | 1 |
| 31 Jan 2019 | £6,518 | £6,788 | £12K | £5,815 |
Where C P Sinclair Limited is registered
The registered office is in Middlesbrough (TS6), in the Redcar and Cleveland local authority area, North East. Show TS6 8DR on a map.
Other trade companies in TS6
- MJD Coatings LtdBuilders
- Saflone Associates LtdRepair services
- Aaron Parry LtdSpecialist contractors
- Harry Micheal Davidson LtdScaffolders
- Theropes LtdPainters and decorators
- Darren Shaw LtdScaffolders
- C A Domin Painting LtdPainters and decorators
- Todd Scaffolding Services LtdScaffolders
What happens if C P Sinclair 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 11154039
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 January 2018 (8 years ago)
- Registered office
- 12 Eston Road, Lazenby, Middlesbrough, TS6 8DR
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 16 January 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 Middlesbrough
Other active civil engineering contractors registered in Middlesbrough.
- Carl R Mitchell Limited2021
- CDB Design Ltd2007
- Chew Construction Ltd2025
- CMM Wind Limited2025
- Cny Rigging Services Limited2025
- Conor Construction Limited2004
- D Lofts Pipefitter Limited2026
- DJG Civils Limited2025
All civil engineering contractors in Middlesbrough · All trades in Middlesbrough · Civil engineering across the UK
Frequently asked questions
When are C P Sinclair Limited's accounts due?
C P Sinclair Limited's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is C P Sinclair Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is C P Sinclair Limited still trading?
C P Sinclair 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 C P Sinclair Limited do?
C P Sinclair Limited is registered under Construction of railways and underground railways (SIC 42120).
How old is C P Sinclair Limited?
C P Sinclair Limited was incorporated on 17 January 2018, 8 years ago.
What is the penalty if C P Sinclair 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 C P Sinclair 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.