- Companies
- Plumbers and heating engineers
- Alton
- Heat Knights Boiler Repair London and Plumbing Ltd
Heat Knights Boiler Repair London and Plumbing Ltd
- Company number
- 09970430
- Incorporated
- 26 Jan 201610 years trading
- Registered office
- The Stables, 23B Lenten Street, Alton, Hampshire, GU34 1HG
- Nature of business
- Plumbing, heat and air-conditioning installation
Heat Knights Boiler Repair London and Plumbing Ltd is a 10-year-old private limited company registered in Alton, company number 09970430, one of 18 plumbing and heating companies in Alton. Its next accounts are due at Companies House on 7 March 2027, and the CT600 for the period to 7 June 2026 is due at HMRC on 7 June 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 £15K (+200%) on the year before, to £7,544.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 7 Jun 2025 | £7,544 | £7,544 | 0 | ||
| 7 Jun 2024 | -£7,544 | £0 | £7,544 | 1 | |
| 31 Jan 2024 | -£3,639 | £1,313 | £1,313 | £6,503 | 1 |
| 31 Jan 2023 | -£2,865 | £519 | £55K | £30K | 1 |
| 31 Jan 2022 | -£2,261 | £2 | £50K | £25K | 1 |
| 31 Jan 2021 | £459 | £21K | £53K | £24K | 1 |
| 31 Jan 2020 | £327 | £624 | £17K | £19K | 1 |
| 31 Jan 2019 | £1 | £1,550 | £12K | £14K | 1 |
| 31 Jan 2018 | £1 | £12K | £13K | ||
| 31 Jan 2017 | £0 | £10K | £11K |
Where Heat Knights Boiler Repair London and Plumbing Ltd is registered
The registered office is in Alton (GU34), in the East Hampshire local authority area, South East. Show GU34 1HG on a map.
Other trade companies in GU34
- Selborne Oak LtdBuilders
- Road & Acre LtdMotor traders
- S Charlton & Sons LimitedFinishing trades
- Buoyansea LtdMachinery repair and installation
- Ajs Design & Build LimitedJoiners and carpenters
- Inca Road Sales LimitedMechanics and garages
- Alton Valeting LtdCleaning companies
- Ab Maintain LimitedMachinery repair and installation
Shared registered office
33 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Heat Knights Boiler Repair London and Plumbing 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 7 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 8 Mar 2027 to 7 Apr 2027 | £150 |
| 1 to 3 months late | 8 Apr 2027 to 7 Jun 2027 | £375 |
| 3 to 6 months late | 8 Jun 2027 to 7 Sep 2027 | £750 |
| More than 6 months late | From 8 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 8 Jun 2027 | £200 |
| 3 months late | 7 Sep 2027 | another £200 |
| 6 months late | 7 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 7 Jun 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
- 09970430
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 January 2016 (10 years ago)
- Registered office
- The Stables, 23B Lenten Street, Alton, Hampshire, GU34 1HG
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 7 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 7 June 2025
- Last confirmation statement
- 28 January 2026
- Previous names
- Heat Knights Ltd (until 11 Dec 2024)
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 Alton
Other active plumbing and heating companies registered in Alton.
- Icool Refrigeration and Air Conditioning Limited2014
- JWW Air Conditioning Limited2025
- Karl Moore Plumbing and Heating Limited2021
- Lehmann Services Ltd2025
- MG Mechanical Ltd2020
- MPS Plumbing Solutions Limited2006
- N B Heating & Plumbing Services Ltd2016
- Pipeline Heating Limited2019
All plumbing and heating companies in Alton · All trades in Alton · Plumbers and heating engineers across the UK
Frequently asked questions
When are Heat Knights Boiler Repair London and Plumbing Ltd's accounts due?
Heat Knights Boiler Repair London and Plumbing Ltd's next accounts are due at Companies House by 7 March 2027 (in 145 days), covering the period to 7 June 2026.
When is Heat Knights Boiler Repair London and Plumbing Ltd's CT600 due?
The CT600 for the period to 7 June 2026 is due at HMRC by 7 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 8 March 2027.
Is Heat Knights Boiler Repair London and Plumbing Ltd still trading?
Heat Knights Boiler Repair London and Plumbing 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 Heat Knights Boiler Repair London and Plumbing Ltd do?
Heat Knights Boiler Repair London and Plumbing Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Heat Knights Boiler Repair London and Plumbing Ltd?
Heat Knights Boiler Repair London and Plumbing Ltd was incorporated on 26 January 2016, 10 years ago.
What is the penalty if Heat Knights Boiler Repair London and Plumbing 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 Heat Knights Boiler Repair London and Plumbing 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.