- Companies
- Plumbers and heating engineers
- London
- SJ Plumb Limited
SJ Plumb Limited
- Company number
- 11757943
- Incorporated
- 9 Jan 20197 years trading
- Registered office
- 20 Rainham Close, London, SE9 2JB
- Nature of business
- Plumbing, heat and air-conditioning installation
SJ Plumb Limited is a 7-year-old private limited company registered in London, company number 11757943, one of 2,972 plumbing and heating companies in London. 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 SJ Plumb 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 £3,509 on the year before, to -£3,327.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- Current assets of £12K against £16K owed within a year: 0.8 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | -£3,327 | £4,277 | £12K | £16K | 2 |
| 31 Jan 2024 | £182 | £4,345 | £6,317 | £6,135 | 2 |
| 31 Jan 2023 | -£772 | £9,216 | £13K | £14K | 2 |
| 31 Jan 2022 | -£5,288 | £1,806 | £7,094 | 2 | |
| 31 Jan 2021 | £927 | £5,041 | £4,114 | 2 | |
| 31 Jan 2020 | £2,346 | £6,012 | £3,666 | 2 |
Where SJ Plumb Limited is registered
The registered office is in London (SE9), in the Greenwich local authority area, London. Show SE9 2JB on a map.
Other trade companies in SE9
- Valkor LtdBuilders
- M.A Developments (Ramsgate) LimitedProperty developers
- Sanchez Dec LtdPainters and decorators
- Yoi As LtdBuilders
- Interfix LtdSpecialist contractors
- South East London Locksmith LimitedSpecialist contractors
- S&O Maintenance LimitedInstallers
- Colvin Construction LimitedBuilders
What happens if SJ Plumb 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
- 11757943
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 January 2019 (7 years ago)
- Registered office
- 20 Rainham Close, London, SE9 2JB
- 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 2025
- Last confirmation statement
- 14 October 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 London
Other active plumbing and heating companies registered in London.
- Sja Plumbing Services Ltd2026
- SJP & Co Services Ltd.2024
- SK Renewables and Heating Ltd2026
- Skibs Ltd2022
- Skilful Contractors Ltd2021
- Skulte Plumbing and Heating Ltd2023
- SL Plumbing and Heating Ltd2025
- Sling & Stone Services Ltd2022
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are SJ Plumb Limited's accounts due?
SJ Plumb Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is SJ Plumb 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 SJ Plumb Limited still trading?
SJ Plumb 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 SJ Plumb Limited do?
SJ Plumb Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is SJ Plumb Limited?
SJ Plumb Limited was incorporated on 9 January 2019, 7 years ago.
What is the penalty if SJ Plumb 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 SJ Plumb 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.