- Companies
- Plumbers and heating engineers
- Leytonstone
- Combi Boiler Services Limited
Combi Boiler Services Limited
- Company number
- 01911720
- Incorporated
- 8 May 198541 years trading
- Registered office
- 319 High Road, Leytonstone, London, E11 4JT
- Nature of business
- Plumbing, heat and air-conditioning installation
Combi Boiler Services Limited is a 41-year-old private limited company registered in Leytonstone, company number 01911720, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £204K (+10.9%) on the year before, to £2.1M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £2.3M against £284K owed within a year: 8.1 times cover.
- 6 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £2.1M | £2.2M | £2.3M | £284K | 6 |
| 30 Nov 2024 | £1.9M | £1.9M | £2.1M | £278K | 6 |
| 30 Nov 2023 | £1.6M | £1.6M | £1.8M | £323K | 6 |
| 30 Nov 2022 | £1.6M | £1.6M | £1.7M | £123K | 6 |
| 30 Nov 2021 | £1.6M | £1.7M | £1.7M | £164K | 6 |
| 30 Nov 2020 | £1.5M | £1.5M | £1.6M | £193K | 4 |
| 30 Nov 2019 | £1.4M | £1.3M | £1.5M | £180K | 4 |
| 30 Nov 2018 | £1.3M | £1.2M | £1.3M | £129K | 3 |
| 30 Nov 2017 | £1.2M | £1.2M | £1.3M | £120K | 6 |
| 30 Nov 2016 | £1.2M | £1.2M | £1.3M | £123K |
Where Combi Boiler Services Limited is registered
The registered office is in Leytonstone (E11), in the Waltham Forest local authority area, London. Show E11 4JT on a map.
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- Meycarwash LtdCleaning companies
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What happens if Combi Boiler Services 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 01911720
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 May 1985 (41 years ago)
- Registered office
- 319 High Road, Leytonstone, London, E11 4JT
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 21 June 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 Leytonstone
Other active plumbing and heating companies registered in Leytonstone.
- Medallion Plastics Limited1985
- M & G Construction Limited1985
- Century Engineering and Refrigeration Installations Limited1985
- S.R. Industrial Limited1985
- Warmington Plumbing & Heating Limited1985
- Colin Bullot & Sons Limited1985
- Merseyside Heating & Plumbing Limited1985
- Dovebrace Limited1985
All plumbing and heating companies in Leytonstone · All trades in Leytonstone · Plumbers and heating engineers across the UK
Frequently asked questions
When are Combi Boiler Services Limited's accounts due?
Combi Boiler Services Limited's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Combi Boiler Services Limited's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Combi Boiler Services Limited still trading?
Combi Boiler Services 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 Combi Boiler Services Limited do?
Combi Boiler Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Combi Boiler Services Limited?
Combi Boiler Services Limited was incorporated on 8 May 1985, 41 years ago.
What is the penalty if Combi Boiler Services 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 Combi Boiler Services 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.