- Company number
- 11334931
- Incorporated
- 28 Apr 20188 years trading
- Registered office
- Unit 5, Avenue Business Park Brockley Road, Elsworth, Cambridge, CB23 4EY
- Nature of business
- Construction of commercial buildings
C.P. Martin Reinforcements Ltd is a 8-year-old private limited company registered in Cambridge, company number 11334931, one of 238 building contractors in Cambridge. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 down £13K (-30.1%) on the year before, to £30K.
- Net assets rose in 2 of 6 year-on-year comparisons on record.
- Current assets of £32K against £1,383 owed within a year: more than 10 times cover.
- 2 employees 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 May 2025 | £30K | £21K | £32K | £1,383 | 2 |
| 30 Apr 2024 | £44K | £18K | £45K | £1,699 | 2 |
| 30 Apr 2023 | £55K | £60K | £107K | £52K | 2 |
| 30 Apr 2022 | £67K | £74K | £118K | £51K | 2 |
| 30 Apr 2021 | £76K | £49K | £90K | £14K | 2 |
| 30 Apr 2020 | £46K | £37K | £60K | £13K | 2 |
| 30 Apr 2019 | £40K | £27K | £68K | £28K | 2 |
Where C.P. Martin Reinforcements Ltd is registered
The registered office is in Cambridge (CB23), in the South Cambridgeshire local authority area, East of England. Show CB23 4EY on a map.
Other trade companies in CB23
- Hayberry Developments LtdProperty developers
- L & A's Care LimitedCleaning companies
- Colton Brickwork LimitedInstallers
- Xpray Group LtdCleaning companies
- Precision Vehicle Solutions LtdMechanics and garages
- Kayb Paint Work LtdPainters and decorators
- Planted Spaces LtdLandscapers and gardeners
- Georgi Garage LtdMechanics and garages
Also registered at this address
16 other companies use the same registered office as C.P. Martin Reinforcements Ltd.
- Aspects Building and Maintenance LimitedBuilders
- Cambs. Injector Services LtdMechanics and garages
- Chapman's Garage LimitedMechanics and garages
- Chelsea Composites Ltd.Mechanics and garages
- Churton Master Thatchers Ltd.Roofers
- Colton Brickwork LimitedInstallers
- Dave Martin Electrical LimitedElectricians
- DSJ Jet Tech Int LimitedMachinery repair and installation
- Herts & Essex Restoration & Glazing LtdSpecialist contractors
- JMB Electrical (UK) LimitedElectricians
- Michael Caine Motorsport Ltd.Motor traders
- NF Associates LimitedPlumbers and heating engineers
- Premier Motor Vehicle Servicing LtdMechanics and garages
- Riley's Grounds Maintenance LtdLandscapers and gardeners
- Storrm Property Maintenance Ltd.Finishing trades
- Terry's Electrical Services Ltd.Electricians
What happens if C.P. Martin Reinforcements 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 11334931
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 April 2018 (8 years ago)
- Registered office
- Unit 5, Avenue Business Park Brockley Road, Elsworth, Cambridge, CB23 4EY
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 18 December 2025
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 Cambridge
Other active building contractors registered in Cambridge.
- C.S.C Solutions Limited2014
- Cagi Ltd2025
- Camb City Construction Ltd2019
- Cambpro Ltd2023
- Cambridge Building Development & Maintenance Company Limited2017
- Cambridge Building Group Ltd2025
- Cambridge Carpentry and Joinery Ltd2022
- Cambridge Cornerstone Limited2024
All building contractors in Cambridge · All trades in Cambridge · Builders across the UK
Frequently asked questions
When are C.P. Martin Reinforcements Ltd's accounts due?
C.P. Martin Reinforcements Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is C.P. Martin Reinforcements Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is C.P. Martin Reinforcements Ltd still trading?
C.P. Martin Reinforcements 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 C.P. Martin Reinforcements Ltd do?
C.P. Martin Reinforcements Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is C.P. Martin Reinforcements Ltd?
C.P. Martin Reinforcements Ltd was incorporated on 28 April 2018, 8 years ago.
What is the penalty if C.P. Martin Reinforcements 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 C.P. Martin Reinforcements 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.