- Companies
- Plumbers and heating engineers
- London
- App Mechanical Ltd
App Mechanical Ltd
- Company number
- 09900602
- Incorporated
- 3 Dec 201510 years trading
- Registered office
- 115 Baker Street, London, W1U 6RT
- Nature of business
- Plumbing, heat and air-conditioning installation
App Mechanical Ltd is a 10-year-old private limited company registered in London, company number 09900602, one of 2,972 plumbing and heating companies in London. 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 £2,461 (-0.4%) on the year before, to £567K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £521K against £151K owed within a year: 3.5 times cover.
- 3 employees on average, up from 2 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £567K | £296K | £521K | £151K | 3 |
| 30 Apr 2024 | £570K | £270K | £497K | £124K | 2 |
| 30 Apr 2023 | £560K | £432K | £717K | £161K | 2 |
| 30 Apr 2022 | £328K | £298K | £494K | £166K | 2 |
| 30 Apr 2021 | £259K | £291K | £378K | £125K | 2 |
| 30 Apr 2020 | £122K | £59K | £209K | £89K | 2 |
| 30 Apr 2019 | £42K | £21K | £82K | £41K | 2 |
| 30 Apr 2018 | £50K | £13K | £75K | £26K | 2 |
| 30 Apr 2017 | £43K | £26K | £109K | £66K | 2 |
| 30 Apr 2016 | £10 |
Who runs and owns App Mechanical Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| A*** H*** | Director | Dec 2015 |
| P*** J*** | Director | Dec 2015 |
People with significant control (2)
Where App Mechanical Ltd is registered
The registered office is in London (W1U), in the Westminster local authority area, London. Show W1U 6RT on a map.
Other trade companies in W1U
- Gpewi Docks LimitedProperty developers
- 113 Noel Road LimitedProperty developers
- Valtaro Property Services LtdFinishing trades
- Hunton House Development LimitedProperty developers
- MW Developments No1 LimitedProperty developers
- Central Property Maintenance and Management Services LtdBuilders
- Welbeck Developments LimitedBuilders
- Eco Construction Group LtdProperty developers
Also registered at this address
2 other companies use the same registered office as App Mechanical Ltd.
- P M Advisory Services LtdProperty developers
- Teamwood Builders & Property Services LimitedProperty developers
What happens if App 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 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
- 09900602
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 December 2015 (10 years ago)
- Registered office
- 115 Baker Street, London, W1U 6RT
- 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
- 2 December 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.
- Applied Mechanical Services Ltd2025
- Aqa Constructions Ltd2024
- Aqua & Heating Ltd2025
- Aqua Dash Plumbing Limited2025
- Aqua Flow Maintenance Ltd2025
- Aqua Geek Plumbing and Heating Ltd2026
- Aqua Heating UK Limited2012
- Aqua Levis Ltd2025
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are App Mechanical Ltd's accounts due?
App Mechanical Ltd's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is App Mechanical Ltd'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 App Mechanical Ltd still trading?
App 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 App Mechanical Ltd do?
App Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is App Mechanical Ltd?
App Mechanical Ltd was incorporated on 3 December 2015, 10 years ago.
Who runs App Mechanical Ltd?
App Mechanical Ltd has 2 active directors, the longest-serving appointed in Dec 2015. Their names and service addresses are on the Companies House register.
Who owns App Mechanical Ltd?
2 people or companies have significant control of App Mechanical Ltd: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if App 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 App 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.