- Companies
- Plumbers and heating engineers
- Southampton
- RJ Air Conditioning Systems Ltd
RJ Air Conditioning Systems Ltd
- Company number
- 17402304
- Incorporated
- 15 Aug 2026
- Registered office
- 102 Starboard Way, Southampton, SO16 8NT
- Nature of business
- Plumbing, heat and air-conditioning installation
RJ Air Conditioning Systems Ltd is a newly incorporated private limited company registered in Southampton, company number 17402304, one of 246 plumbing and heating companies in Southampton. Its next accounts are due at Companies House on 15 May 2028, and its first CT600 is due at HMRC on 14 August 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 RJ Air Conditioning Systems Ltd is registered
The registered office is in Southampton (SO16), in the Southampton local authority area, South East. Show SO16 8NT on a map.
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- Coastline Living LimitedProperty developers
- STN Brickwork LimitedBuilders
- Bam M.E.P LtdPlumbers and heating engineers
- PPK Carpentry LimitedJoiners and carpenters
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- Liberty Link Investments LtdProperty developers
- Pathway Cars UK LtdMotor traders
Also registered at this address
1 other company uses the same registered office as RJ Air Conditioning Systems Ltd.
- RJ Garage Equipment LtdMachinery repair and installation
What happens if RJ Air Conditioning Systems 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 15 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 16 May 2028 to 15 Jun 2028 | £150 |
| 1 to 3 months late | 16 Jun 2028 to 15 Aug 2028 | £375 |
| 3 to 6 months late | 16 Aug 2028 to 15 Nov 2028 | £750 |
| More than 6 months late | From 16 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17402304
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 August 2026
- Registered office
- 102 Starboard Way, Southampton, SO16 8NT
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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 Southampton
Other active plumbing and heating companies registered in Southampton.
- RJK Plumbers Ltd2022
- RLPH Limited2020
- Rosco Gas Ltd2019
- RP Heating Solutions Ltd2020
- Russell Drainage Services Limited2006
- S & J Heating & Cooling Ltd2026
- S. Philps Gas Services Ltd2003
- S.N.G. Mechanical Limited2006
All plumbing and heating companies in Southampton · All trades in Southampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are RJ Air Conditioning Systems Ltd's accounts due?
RJ Air Conditioning Systems Ltd's next accounts are due at Companies House by 15 May 2028 (in 580 days), covering the period to 31 August 2027.
When is RJ Air Conditioning Systems 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 14 August 2027, due by 14 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is RJ Air Conditioning Systems Ltd still trading?
RJ Air Conditioning Systems 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 RJ Air Conditioning Systems Ltd do?
RJ Air Conditioning Systems Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is RJ Air Conditioning Systems Ltd?
RJ Air Conditioning Systems Ltd was incorporated on 15 August 2026, less than a year ago.
What is the penalty if RJ Air Conditioning Systems 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 RJ Air Conditioning Systems 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.