- Companies
- Plumbers and heating engineers
- Walthamstow
- Coppermill Plumbers Ltd
Coppermill Plumbers Ltd
- Company number
- 10571556
- Incorporated
- 18 Jan 20179 years trading
- Registered office
- 45 Rensburg Road, Walthamstow, London, E17 7HL
- Nature of business
- Plumbing, heat and air-conditioning installation
Coppermill Plumbers Ltd is a 9-year-old private limited company registered in Walthamstow, company number 10571556, one of 8 plumbing and heating companies in Walthamstow. 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.
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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 £3,639 (+16.3%) on the year before, to £26K.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £30K against £4,231 owed within a year: 7.1 times cover.
- 3 employees on average, up from 1 the year before.
- 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 | £26K | £15K | £30K | £4,231 | 3 |
| 31 Jan 2025 | £22K | £780 | £29K | £6,998 | 1 |
| 31 Jan 2024 | £13K | £4,947 | £19K | £6,419 | 1 |
| 31 Jan 2023 | £39K | £35K | £47K | £7,484 | 1 |
| 31 Jan 2022 | £7,553 | £4,023 | £8,187 | £634 | 1 |
| 31 Jan 2021 | £6,849 | £2,992 | £8,372 | £1,523 | 1 |
| 31 Jan 2020 | £357 | £865 | £865 | £508 | 1 |
| 31 Jan 2019 | £193 | £236 | £236 | £43 | |
| 31 Jan 2018 | £10 | £10 | £10 |
Where Coppermill Plumbers Ltd is registered
The registered office is in Walthamstow (E17), in the Waltham Forest local authority area, London. Show E17 7HL on a map.
Other trade companies in E17
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- Spotless Behaviour LtdCleaning companies
- Addison & Vale Construction LtdBuilders
- Karina Business LtdInstallers
- Hazzi Automotive LtdMechanics and garages
- Zlatev Construction Service LimitedFinishing trades
- Zzzguard LtdBuilders
- Ok Estates & Developments LtdBuilders
What happens if Coppermill Plumbers 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 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
- 10571556
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 January 2017 (9 years ago)
- Registered office
- 45 Rensburg Road, Walthamstow, London, E17 7HL
- 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
- 16 January 2026
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 Walthamstow
Other active plumbing and heating companies registered in Walthamstow.
- Flow and Heat Solutions Ltd2024
- Frankie's Gas Ltd2019
- Hearts Commercial Services Ltd2021
- Like Logs Ltd2013
- P & J Renovations Ltd2019
- Total Build Solution London Ltd2023
- Black Horse Plumbing Limited2023
All plumbing and heating companies in Walthamstow · All trades in Walthamstow · Plumbers and heating engineers across the UK
Frequently asked questions
When are Coppermill Plumbers Ltd's accounts due?
Coppermill Plumbers Ltd's next accounts are due at Companies House by 31 October 2026 (in 19 days), covering the period to 31 January 2026.
When is Coppermill Plumbers Ltd'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 Coppermill Plumbers Ltd still trading?
Coppermill Plumbers 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 Coppermill Plumbers Ltd do?
Coppermill Plumbers Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Coppermill Plumbers Ltd?
Coppermill Plumbers Ltd was incorporated on 18 January 2017, 9 years ago.
What is the penalty if Coppermill Plumbers 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 Coppermill Plumbers 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.