- Companies
- Plumbers and heating engineers
- London
- A&A Systems Limited
A&A Systems Limited
- Company number
- 16455642
- Incorporated
- 18 May 20251 year trading
- Registered office
- Flat 1, 19 Limes Grove, London, SE13 6DD
- Nature of business
- Plumbing, heat and air-conditioning installation
A&A Systems Limited is a 1-year-old private limited company registered in London, company number 16455642, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 May 2026, as filed at Companies House.
Where A&A Systems Limited is registered
The registered office is in London (SE13), in the Lewisham local authority area, London. Show SE13 6DD on a map.
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What happens if A&A Systems 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 16455642
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 May 2025 (1 year ago)
- Registered office
- Flat 1, 19 Limes Grove, London, SE13 6DD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 26 May 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.
- A&G Plumbing and Heating London Ltd2020
- A&H Heating and Gas Ltd2025
- A&P Heating and Plumbing Limited2022
- A&R Clima Air Conditioner Limited2024
- A&S Construction and Cleaning Ltd2025
- A&V Plumbing and Heating Ltd2022
- A-Class Heating Services Ltd2025
- A-Z Plumbing Ltd2024
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are A&A Systems Limited's accounts due?
A&A Systems Limited's next accounts are due at Companies House by 29 February 2028 (in 504 days), covering the period to 31 May 2027.
When is A&A Systems Limited's CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is A&A Systems Limited still trading?
A&A Systems 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&A Systems Limited do?
A&A Systems Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is A&A Systems Limited?
A&A Systems Limited was incorporated on 18 May 2025, 1 year ago.
What is the penalty if A&A Systems 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&A Systems 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.