- Companies
- Plumbers and heating engineers
- Chatham
- RMX Mechanical Ltd
RMX Mechanical Ltd
- Company number
- 17028008
- Incorporated
- 11 Feb 2026
- Registered office
- Unit 34 the Joiners Shop, The Historic Dockyard, Chatham, Kent, ME4 4TZ
- Nature of business
- Plumbing, heat and air-conditioning installation
RMX Mechanical Ltd is a newly incorporated private limited company registered in Chatham, company number 17028008, one of 105 plumbing and heating companies in Chatham. Its next accounts are due at Companies House on 11 November 2027, and its first CT600 is due at HMRC on 10 February 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?
File the first accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for RMX Mechanical LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Who runs and owns RMX Mechanical Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| J*** K*** | Director | Feb 2026 |
| A*** S*** | Director | Feb 2026 |
| M*** S*** | Director | Feb 2026 |
People with significant control (2)
Where RMX Mechanical Ltd is registered
The registered office is in Chatham (ME4), in the Medway local authority area, South East. Show ME4 4TZ on a map.
Other trade companies in ME4
- N D Contracts & Consultancy LimitedCivil engineering
- Magnus Roofing & Services LtdRoofers
- C.H Cleaning Services LimitedCleaning companies
- Aircon Express UK LtdPlumbers and heating engineers
- D and J Cleaning Solutions LtdCleaning companies
- R.B.Builders and Managment LtdBuilders
- RJP Tint Solutions LtdFinishing trades
- Hotncold Solutions LtdMachinery repair and installation
What happens if RMX 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 11 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 12 Nov 2027 to 11 Dec 2027 | £150 |
| 1 to 3 months late | 12 Dec 2027 to 11 Feb 2028 | £375 |
| 3 to 6 months late | 12 Feb 2028 to 11 May 2028 | £750 |
| More than 6 months late | From 12 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 17028008
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 February 2026
- Registered office
- Unit 34 the Joiners Shop, The Historic Dockyard, Chatham, Kent, ME4 4TZ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 28 February (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 Chatham
Other active plumbing and heating companies registered in Chatham.
- Robinson Heating and Plumbing Services Limited2025
- SCM Plumbing & Heating Ltd2017
- SG Boiler Care Ltd2025
- Sharpe Heating Solutions Ltd2019
- South London Plumbing Services Ltd2020
- SPJ Plumbing Services Ltd2022
- Spooner Plumbing & Heating Limited2002
- Startus Heating & Maintenance Ltd2025
All plumbing and heating companies in Chatham · All trades in Chatham · Plumbers and heating engineers across the UK
Frequently asked questions
When are RMX Mechanical Ltd's accounts due?
RMX Mechanical Ltd's next accounts are due at Companies House by 11 November 2027 (in 395 days), covering the period to 28 February 2027.
When is RMX Mechanical 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 10 February 2027, due by 10 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is RMX Mechanical Ltd still trading?
RMX 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 RMX Mechanical Ltd do?
RMX Mechanical Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is RMX Mechanical Ltd?
RMX Mechanical Ltd was incorporated on 11 February 2026, less than a year ago.
Who runs RMX Mechanical Ltd?
RMX Mechanical Ltd has 3 active directors, the longest-serving appointed in Feb 2026. Their names and service addresses are on the Companies House register.
Who owns RMX Mechanical Ltd?
2 people or companies have significant control of RMX 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 RMX 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 RMX 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.