- Companies
- Plumbers and heating engineers
- Welwyn Garden City
- A.L. Mechanical Limited
A.L. Mechanical Limited
- Company number
- 14834600
- Incorporated
- 28 Apr 20233 years trading
- Registered office
- 19 Sweet Briar, Welwyn Garden City, Hertfordshire, AL7 3DU
- Nature of business
- Plumbing, heat and air-conditioning installation
A.L. Mechanical Limited is a 3-year-old private limited company registered in Welwyn Garden City, company number 14834600, one of 32 plumbing and heating companies in Welwyn Garden City. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 down £12K (-150.7%) on the year before, to -£3,933.
- Current assets of £13K against £17K owed within a year: 0.8 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | -£3,933 | £850 | £13K | £17K | 0 |
| 30 Apr 2024 | £7,752 | £932 | £11K | £2,940 | 1 |
| 30 Apr 2023 | £100 | £100 | £100 | 1 |
Where A.L. Mechanical Limited is registered
The registered office is in Welwyn Garden City (AL7), in the Welwyn Hatfield local authority area, East of England. Show AL7 3DU on a map.
Other trade companies in AL7
- Mechanicalwise LtdInstallers
- Azalea Services LimitedSpecialist contractors
- Malmech and Mannion LimitedMechanics and garages
- T&D Construction Group LtdFinishing trades
- Vertec Roofing and Building LtdRoofers
- Selectlane LtdMotor traders
- Af Pressure Washing LtdCleaning companies
- Jet Professional LtdCleaning companies
What happens if A.L. Mechanical 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 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- 14834600
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 April 2023 (3 years ago)
- Registered office
- 19 Sweet Briar, Welwyn Garden City, Hertfordshire, AL7 3DU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 27 April 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 Welwyn Garden City
Other active plumbing and heating companies registered in Welwyn Garden City.
- Aircon Elite Limited2015
- Al8 Plumbing Ltd2026
- Alpha Air Conditioning UK Limited2004
- B G Sweeney Ltd2009
- Baksa Limited2011
- Boss Plumbing Services Ltd2025
- Castle Heating Herts Ltd2018
- Chillcore Refrigeration and Air Conditioning Ltd2026
All plumbing and heating companies in Welwyn Garden City · All trades in Welwyn Garden City · Plumbers and heating engineers across the UK
Frequently asked questions
When are A.L. Mechanical Limited's accounts due?
A.L. Mechanical Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is A.L. Mechanical Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is A.L. Mechanical Limited still trading?
A.L. Mechanical 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 A.L. Mechanical Limited do?
A.L. Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is A.L. Mechanical Limited?
A.L. Mechanical Limited was incorporated on 28 April 2023, 3 years ago.
What is the penalty if A.L. Mechanical 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 A.L. Mechanical 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.