- Companies
- Plumbers and heating engineers
- London
- Alphatec Boiler Repairs Ltd
Alphatec Boiler Repairs Ltd
- Company number
- 05598981
- Incorporated
- 20 Oct 200520 years trading
- Registered office
- 807 Green Lanes, London, N21 2SG
- Nature of business
- Plumbing, heat and air-conditioning installation
Alphatec Boiler Repairs Ltd is a 20-year-old private limited company registered in London, company number 05598981, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 October 2026.
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 £21K (+300%) on the year before, to £28K.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £34K against £16K owed within a year: 2.2 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2024 | £28K | £34K | £16K | 2 | |
| 31 Oct 2023 | £6,906 | £45K | £41K | 2 | |
| 31 Oct 2022 | £19K | £58K | 2 | ||
| 31 Oct 2021 | £32K | £96K | £53K | 2 | |
| 31 Oct 2020 | £29K | £53K | £42K | 2 | |
| 31 Oct 2019 | £40K | £25K | £5,937 | 2 | |
| 31 Oct 2018 | -£42K | -£55K | £11K | ||
| 31 Oct 2017 | -£28K | -£37K | £9,365 | ||
| 31 Oct 2016 | £32K | £8,649 | |||
| 31 Oct 2015 | £24K | £21K | £28K | £11K |
Where Alphatec Boiler Repairs Ltd is registered
The registered office is in London (N21), in the Enfield local authority area, London. Show N21 2SG on a map.
Other trade companies in N21
- Churchill Bespoke Tailors LtdRepair services
- Art of Tiling LtdBuilders
- Profinix LimitedBuilders
- Bleachy LimitedCleaning companies
- PP Carpentry LtdBuilders
- 6 Bourne Hill LtdMechanics and garages
- Empire Assessments NVQS LtdSpecialist contractors
- Emergency Sparkz LtdElectricians
Also registered at this address
7 other companies use the same registered office as Alphatec Boiler Repairs Ltd.
- 6 Bourne Hill LtdMechanics and garages
- A Robinson Floors LtdFloor and wall tilers
- Greystone Developments (London) LtdBuilders
- Herts Automotive LtdMotor traders
- K W Carpentry Services LimitedInstallers
- Martin Guy Developments LtdGroundworks and demolition
- Youngs Plumbing LtdPlumbers and heating engineers
What happens if Alphatec Boiler Repairs 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
- 05598981
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 October 2005 (20 years ago)
- Registered office
- 807 Green Lanes, London, N21 2SG
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 20 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.
- Alpine Climate Ltd2026
- Alstra Mechanical Services Ltd2021
- Alt Plumbing & Heating Ltd2015
- Alvernix Group Ltd2026
- Am Plumbing Solutions Limited2026
- Am/PM Plumbing & Heating Engineers Ltd2025
- Ambient Design Services Ltd2015
- Ambient Heating & Plumbing Ltd2011
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Alphatec Boiler Repairs Ltd's accounts due?
Alphatec Boiler Repairs Ltd's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Alphatec Boiler Repairs Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 October 2025, due by 31 October 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Alphatec Boiler Repairs Ltd still trading?
Alphatec Boiler Repairs 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 Alphatec Boiler Repairs Ltd do?
Alphatec Boiler Repairs Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Alphatec Boiler Repairs Ltd?
Alphatec Boiler Repairs Ltd was incorporated on 20 October 2005, 20 years ago.
What is the penalty if Alphatec Boiler Repairs 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 Alphatec Boiler Repairs 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.