- Companies
- Plumbers and heating engineers
- St Austell
- J. P. Martin and Son Ltd
J. P. Martin and Son Ltd
- Company number
- 09358033
- Incorporated
- 17 Dec 201411 years trading
- Registered office
- Roscarrick, Hornick Hill, St Austell, Cornwall, PL26 7TR
- Nature of business
- Plumbing, heat and air-conditioning installation
J. P. Martin and Son Ltd is a 11-year-old private limited company registered in St Austell, company number 09358033, one of 6 plumbing and heating companies in St Austell. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
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 £1,939 (-8.3%) on the year before, to £22K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £71K against £68K owed within a year: 1.0 times cover.
- 1 employee on average, down from 2 the year before.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £22K | £13K | £71K | £68K | 1 |
| 31 Jan 2025 | £23K | £72K | £99K | £96K | 2 |
| 31 Jan 2024 | £6,373 | £93K | £112K | 1 | |
| 31 Jan 2023 | £14K | £85K | £84K | 1 | |
| 31 Jan 2022 | £36K | £72K | £54K | 1 | |
| 31 Jan 2021 | £17K | £95K | £101K | 1 | |
| 31 Jan 2020 | £26K | £96K | £90K | ||
| 31 Jan 2019 | £41K | £109K | £90K | 5 | |
| 31 Jan 2018 | £57K | £112K | £82K | 5 | |
| 31 Jan 2017 | £44K | £122K | £103K |
Where J. P. Martin and Son Ltd is registered
The registered office is in St Austell (PL26), in the Cornwall local authority area, South West. Show PL26 7TR on a map.
Other trade companies in PL26
- L.W. Roofing (Cornwall) LtdRoofers
- Wall2Wall Building LtdBuilders
- Sam Bray Window Cleaning LtdCleaning companies
- Ocean Shore (SW) LtdBuilders
- Coast to Coast Water Engineering LtdSpecialist contractors
- Elevate Construction SW LimitedProperty developers
- Trelavour Road Garage (SW) LtdMechanics and garages
- Treverbyn Trade Cars T/A Treverbyn Car Sales LtdMotor traders
What happens if J. P. Martin and Son 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 31 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2029 | 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
- 09358033
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 December 2014 (11 years ago)
- Registered office
- Roscarrick, Hornick Hill, St Austell, Cornwall, PL26 7TR
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 17 December 2025
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in St Austell
Other active plumbing and heating companies registered in St Austell.
- James Attwood Heating and Plumbing Limited2017
- C Macnab Heating & Plumbing Ltd2019
- Cosy Fires & Woodburners Ltd2026
- G.Barnes Ltd2022
- Hydronics Plumbing & Heating Ltd2018
All plumbing and heating companies in St Austell · All trades in St Austell · Plumbers and heating engineers across the UK
Frequently asked questions
When are J. P. Martin and Son Ltd's accounts due?
J. P. Martin and Son Ltd's next accounts are due at Companies House by 31 October 2027 (in 383 days), covering the period to 31 January 2027.
When is J. P. Martin and Son Ltd's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is J. P. Martin and Son Ltd still trading?
J. P. Martin and Son 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 J. P. Martin and Son Ltd do?
J. P. Martin and Son Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is J. P. Martin and Son Ltd?
J. P. Martin and Son Ltd was incorporated on 17 December 2014, 11 years ago.
What is the penalty if J. P. Martin and Son 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 J. P. Martin and Son 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.