- Companies
- Civil engineering
- Mountain Ash
- Air Jointing Limited
Air Jointing Limited
- Company number
- 17193444
- Incorporated
- 1 May 2026
- Registered office
- 22 Oxford Street, Mountain Ash, CF45 3PL
- Nature of business
- Construction of utility projects for electricity and telecommunications
Air Jointing Limited is a newly incorporated private limited company registered in Mountain Ash, company number 17193444, one of 12 civil engineering contractors in Mountain Ash. Its next accounts are due at Companies House on 1 February 2028, and its first CT600 is due at HMRC on 30 April 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.
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Where Air Jointing Limited is registered
The registered office is in Mountain Ash (CF45), in the Rhondda Cynon Taf local authority area, Wales. Show CF45 3PL on a map.
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- Lee Griffiths Contractors LimitedFinishing trades
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Also registered at this address
2 other companies use the same registered office as Air Jointing Limited.
- M&Econnect LimitedElectricians
- R&D Sprinklers LimitedPlumbers and heating engineers
What happens if Air Jointing 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 1 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 2 Feb 2028 to 1 Mar 2028 | £150 |
| 1 to 3 months late | 2 Mar 2028 to 1 May 2028 | £375 |
| 3 to 6 months late | 2 May 2028 to 1 Aug 2028 | £750 |
| More than 6 months late | From 2 Aug 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
- 17193444
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 May 2026
- Registered office
- 22 Oxford Street, Mountain Ash, CF45 3PL
- Nature of business
- Construction of utility projects for electricity and telecommunications (SIC 42220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Mountain Ash
Other active civil engineering contractors registered in Mountain Ash.
- C&M Jones Groundworks Limited2020
- Dan Rail Welding Ltd2020
- DSR Groundworks Ltd2015
- Evanhalli Ltd2019
- I Fix Reinforcements Ltd2008
- JLT Rail Limited2020
- JWG Utilities Limited2017
- Marton (Civil Engineering) Limited1976
All civil engineering contractors in Mountain Ash · All trades in Mountain Ash · Civil engineering across the UK
Frequently asked questions
When are Air Jointing Limited's accounts due?
Air Jointing Limited's next accounts are due at Companies House by 1 February 2028 (in 476 days), covering the period to 31 May 2027.
When is Air Jointing Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 30 April 2027, due by 30 April 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Air Jointing Limited still trading?
Air Jointing 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 Air Jointing Limited do?
Air Jointing Limited is registered under Construction of utility projects for electricity and telecommunications (SIC 42220).
How old is Air Jointing Limited?
Air Jointing Limited was incorporated on 1 May 2026, less than a year ago.
What is the penalty if Air Jointing 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 Air Jointing 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.