- Companies
- Plumbers and heating engineers
- Watford
- Alpha Ventilation Services Ltd.
Alpha Ventilation Services Ltd.
- Company number
- 15128603
- Incorporated
- 10 Sep 20233 years trading
- Registered office
- 83 the Gossamers, Watford, WD25 9AN
- Nature of business
- Plumbing, heat and air-conditioning installation
Alpha Ventilation Services Ltd. is a 3-year-old private limited company registered in Watford, company number 15128603, one of 124 plumbing and heating companies in Watford. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Alpha Ventilation Services Ltd. is registered
The registered office is in Watford (WD25), in the Watford local authority area, East of England. Show WD25 9AN on a map.
Other trade companies in WD25
- Ardel Construction LimitedBuilders
- Velocity Mechanical LtdPlumbers and heating engineers
- Jpjcm LimitedFinishing trades
- Mix & Go LtdSpecialist contractors
- Colney Prestige Autos LtdMotor traders
- Prestige Garden Services LtdLandscapers and gardeners
- Destinyd LtdMachinery repair and installation
- Leaf Space LimitedFinishing trades
What happens if Alpha Ventilation Services 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 30 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 15128603
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 September 2023 (3 years ago)
- Registered office
- 83 the Gossamers, Watford, WD25 9AN
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 9 September 2026
- Previous names
- Alpha Ducting Ltd (until 22 Jan 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 Watford
Other active plumbing and heating companies registered in Watford.
- Ams Domestic Ltd2013
- Appleby's Mechanical Services Ltd2026
- Aps Mechanical Services Limited1994
- Aquamod Ltd2018
- As Plumbing Ltd2015
- Astec Construction Ltd2010
- Atherstone Air Conditioning Limited2026
- Atlan Engineering Ltd2026
All plumbing and heating companies in Watford · All trades in Watford · Plumbers and heating engineers across the UK
Frequently asked questions
When are Alpha Ventilation Services Ltd.'s accounts due?
Alpha Ventilation Services Ltd.'s next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Alpha Ventilation Services Ltd.'s CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Alpha Ventilation Services Ltd. still trading?
Alpha Ventilation Services 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 Alpha Ventilation Services Ltd. do?
Alpha Ventilation Services Ltd. is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Alpha Ventilation Services Ltd.?
Alpha Ventilation Services Ltd. was incorporated on 10 September 2023, 3 years ago.
What is the penalty if Alpha Ventilation Services 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 Alpha Ventilation Services 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.