- Companies
- Electricians
- Watford
- Ar Mechanical Engineering Ltd
Ar Mechanical Engineering Ltd
- Company number
- 17130157
- Incorporated
- 31 Mar 2026
- Registered office
- 7 Copsewood Road, Watford, WD24 5DY
- Nature of business
- Electrical installation; Plumbing, heat and air-conditioning installation; Other construction installation
Ar Mechanical Engineering Ltd is a newly incorporated private limited company registered in Watford, company number 17130157, one of 141 electrical contractors in Watford. Its next accounts are due at Companies House on 31 December 2027, and its first CT600 is due at HMRC on 30 March 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
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Where Ar Mechanical Engineering Ltd is registered
The registered office is in Watford (WD24), in the Watford local authority area, East of England. Show WD24 5DY on a map.
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What happens if Ar Mechanical Engineering 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 17130157
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 March 2026
- Registered office
- 7 Copsewood Road, Watford, WD24 5DY
- Nature of business
- Electrical installation (SIC 43210)
Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290) - Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Watford
Other active electrical contractors registered in Watford.
- Artha Nexus Limited2025
- Ats Electrical and Security Ltd2025
- Auto Safeguard Ltd2024
- Avente Limited2004
- Ayan Electricians Limited2019
- Bagata Ltd2016
- Baldwin & Bleakley Electrical Services Limited1976
- Bapashri Services Limited2013
All electrical contractors in Watford · All trades in Watford · Electricians across the UK
Frequently asked questions
When are Ar Mechanical Engineering Ltd's accounts due?
Ar Mechanical Engineering Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Ar Mechanical Engineering 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 30 March 2027, due by 30 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Ar Mechanical Engineering Ltd still trading?
Ar Mechanical Engineering 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 Ar Mechanical Engineering Ltd do?
Ar Mechanical Engineering Ltd is registered under Electrical installation (SIC 43210); Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290).
How old is Ar Mechanical Engineering Ltd?
Ar Mechanical Engineering Ltd was incorporated on 31 March 2026, less than a year ago.
What is the penalty if Ar Mechanical Engineering 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 Ar Mechanical Engineering 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.