- Companies
- Plumbers and heating engineers
- London
- Atp Maintenance (London) Limited
Atp Maintenance (London) Limited
- Company number
- 08745510
- Incorporated
- 23 Oct 201312 years trading
- Registered office
- 1 Kings Avenue, London, N21 3NA
- Nature of business
- Plumbing, heat and air-conditioning installation
Atp Maintenance (London) Limited is a 12-year-old private limited company registered in London, company number 08745510, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 30 October 2026, and the CT600 for the period to 30 January 2026 is due at HMRC on 30 January 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 up £31K (+107.3%) on the year before, to £2,121.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £46K against £80K owed within a year: 0.6 times cover.
- 2 employees on average, down from 3 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 |
|---|---|---|---|---|---|
| 31 Jan 2025 | £2,121 | £746 | £46K | £80K | 2 |
| 31 Jan 2024 | -£29K | £703 | £39K | £81K | 3 |
| 31 Jan 2023 | -£25K | £492 | £25K | £75K | 3 |
| 31 Jan 2022 | £91K | -£197 | £261K | £149K | 2 |
| 31 Jan 2021 | £99K | £95K | £180K | £95K | 2 |
| 30 Oct 2020 | £64K | £87K | £26K | 1 | |
| 31 Oct 2019 | £46K | £76K | £33K | 2 | |
| 31 Oct 2018 | £25K | £41K | £19K | ||
| 31 Oct 2017 | £19K | £37K | £21K | ||
| 31 Oct 2016 | £18K | £18K | £34K |
Where Atp Maintenance (London) Limited is registered
The registered office is in London (N21), in the Enfield local authority area, London. Show N21 3NA on a map.
Other trade companies in N21
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- Art of Tiling LtdBuilders
- Profinix LimitedBuilders
- Bleachy LimitedCleaning companies
- PP Carpentry LtdBuilders
- 6 Bourne Hill LtdMechanics and garages
- Empire Assessments NVQS LtdSpecialist contractors
- Emergency Sparkz LtdElectricians
Shared registered office
180 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Atp Maintenance (London) 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 30 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Oct 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 30 Jan 2027 | £375 |
| 3 to 6 months late | 31 Jan 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Jan 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 30 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jan 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
- 08745510
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 October 2013 (12 years ago)
- Registered office
- 1 Kings Avenue, London, N21 3NA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 28 June 2026
- Previous names
- Atp London Limited (until 22 Nov 2013)
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.
- Attain Plumbing & Heating Ltd2025
- Attentive Gas Heating Ltd2026
- Aurora Estates & Builders Ltd2025
- Aurum Cooling Ltd2026
- Austin & Miller Ltd2015
- Av Bespoke Kitchens and Bathrooms Ltd2026
- Av Plumbing & Heating Services Ltd2023
- Ava (Barking Road) Limited2024
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Atp Maintenance (London) Limited's accounts due?
Atp Maintenance (London) Limited's next accounts are due at Companies House by 30 October 2026 (in 17 days), covering the period to 30 January 2026.
When is Atp Maintenance (London) Limited's CT600 due?
The CT600 for the period to 30 January 2026 is due at HMRC by 30 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 October 2026.
Is Atp Maintenance (London) Limited still trading?
Atp Maintenance (London) 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 Atp Maintenance (London) Limited do?
Atp Maintenance (London) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Atp Maintenance (London) Limited?
Atp Maintenance (London) Limited was incorporated on 23 October 2013, 12 years ago.
What is the penalty if Atp Maintenance (London) 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 Atp Maintenance (London) 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.