- Companies
- Finishing trades
- Porth
- C John & Sons Ltd
C John & Sons Ltd
- Company number
- 10595622
- Incorporated
- 1 Feb 20179 years trading
- Registered office
- 25 Swyn Y Nant, Thomastown, Tonyrefail, Porth, CF39 8FE
- Nature of business
- Other building completion and finishing
C John & Sons Ltd is a 9-year-old private limited company registered in Porth, company number 10595622, one of 6 building finishing companies in Porth. 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 up £645 (+5.9%) on the year before, to £12K.
- Net assets rose in 6 of 8 year-on-year comparisons on record.
- Current assets of £38K against £26K owed within a year: 1.4 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 9 years, 2018 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2026 | £12K | £38K | £26K | 3 | |
| 31 Jan 2025 | £11K | £27K | £16K | 3 | |
| 31 Jan 2024 | £10K | £35K | £25K | 3 | |
| 31 Jan 2023 | £11K | £38K | £22K | 0 | |
| 31 Jan 2022 | £5,596 | £37K | £28K | 0 | |
| 31 Jan 2021 | £2,689 | £17K | £15K | 0 | |
| 31 Jan 2020 | -£6,576 | £4,290 | £7,976 | 0 | |
| 31 Jan 2019 | -£1,828 | £4,296 | £9,514 | 0 | |
| 31 Jan 2018 | -£2,489 | £4,761 | £12K | 0 |
Where C John & Sons Ltd is registered
The registered office is in Porth (CF39), in the Rhondda Cynon Taf local authority area, Wales. Show CF39 8FE on a map.
Other trade companies in CF39
- Nvme Detailing LimitedMechanics and garages
- Choctar LimitedBuilders
- J Cantwell Surfacing & Contracting LtdCivil engineering
- Ok Rail LtdCivil engineering
- Porth Ceilings & Interiors LtdFinishing trades
- Wydex LtdBuilders
- Time Lec Services LtdElectricians
- Arb-Scape Tree Surgery & Landscaping LtdLandscapers and gardeners
What happens if C John & Sons 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
- 10595622
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 February 2017 (9 years ago)
- Registered office
- 25 Swyn Y Nant, Thomastown, Tonyrefail, Porth, CF39 8FE
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 20 February 2026
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Porth
Other active building finishing companies registered in Porth.
- Centric Silicone Render Systems Ltd2025
- Porth Ceilings & Interiors Ltd2026
- S&B Drylining Ltd2021
- Sinvula Solutions Ltd2020
- Ah Finishing and Developments Ltd2026
All building finishing companies in Porth · All trades in Porth · Finishing trades across the UK
Frequently asked questions
When are C John & Sons Ltd's accounts due?
C John & Sons 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 C John & Sons 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 C John & Sons Ltd still trading?
C John & Sons 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 John & Sons Ltd do?
C John & Sons Ltd is registered under Other building completion and finishing (SIC 43390).
How old is C John & Sons Ltd?
C John & Sons Ltd was incorporated on 1 February 2017, 9 years ago.
What is the penalty if C John & Sons 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 John & Sons 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.