- Companies
- Plumbers and heating engineers
- London
- Ag Mechanical Ltd
Ag Mechanical Ltd
- Company number
- 15091640
- Incorporated
- 23 Aug 20233 years trading
- Registered office
- 78 Charlton Park Lane, London, SE7 8QR
- Nature of business
- Plumbing, heat and air-conditioning installation
Ag Mechanical Ltd is a 3-year-old private limited company registered in London, company number 15091640, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Ag Mechanical LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £18K (+157.3%) on the year before, to £29K.
- Current assets of £34K against £4,457 owed within a year: 7.5 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £29K | £34K | £4,457 | 1 | |
| 31 Aug 2024 | £11K | £20K | £8,541 | 1 |
Where Ag Mechanical Ltd is registered
The registered office is in London (SE7), in the Greenwich local authority area, London. Show SE7 8QR on a map.
Other trade companies in SE7
- Mainfix LtdElectricians
- Maxxify Solutions LtdElectricians
- Bozgan Construction LtdFinishing trades
- Isharpen All LimitedMachinery repair and installation
- Rmech Solutions LtdBuilders
- Beravo Cleaning Services LtdCleaning companies
- Hyperfibre LimitedCivil engineering
- Rac Auto Repair LtdMechanics and garages
Also registered at this address
1 other company uses the same registered office as Ag Mechanical Ltd.
- Lgolcas LtdSpecialist contractors
What happens if Ag Mechanical 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 15091640
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 August 2023 (3 years ago)
- Registered office
- 78 Charlton Park Lane, London, SE7 8QR
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 22 August 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 London
Other active plumbing and heating companies registered in London.
- Agim Heating Ltd2026
- Agy Skills Direct Limited2005
- Ah Plumbing & Gas Ltd2017
- Aia Contractors Ltd2020
- Aims Group Ltd2023
- Aio Utilities Ltd2025
- Air Con 247 Ltd2026
- Air Conditioning & Ventilation (Surrey) Ltd2023
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Ag Mechanical Ltd's accounts due?
Ag Mechanical Ltd's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is Ag Mechanical Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Ag Mechanical Ltd still trading?
Ag Mechanical 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 Ag Mechanical Ltd do?
Ag Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Ag Mechanical Ltd?
Ag Mechanical Ltd was incorporated on 23 August 2023, 3 years ago.
What is the penalty if Ag Mechanical 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 Ag Mechanical 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.