- Companies
- Plumbers and heating engineers
- Belfast
- CMS Mechanical Services Ltd
CMS Mechanical Services Ltd
- Company number
- NI679747
- Incorporated
- 2 Jun 20215 years trading
- Registered office
- City East Business Centre, 68-72 Newtownards Road, Belfast, BT4 1GW
- Nature of business
- Plumbing, heat and air-conditioning installation
CMS Mechanical Services Ltd is a 5-year-old private limited company registered in Belfast, company number NI679747, one of 99 plumbing and heating companies in Belfast. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 £42K (+137.5%) on the year before, to £72K.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £29K against £3,313 owed within a year: 8.7 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 5 years, 2022 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £72K | £29K | £3,313 | 3 | |
| 31 Mar 2025 | £30K | £26K | 3 | ||
| 31 Mar 2024 | £16K | £27K | £17K | 3 | |
| 31 Mar 2023 | £27K | £29K | £10K | 3 | |
| 30 Jun 2022 | £15K | £23K | £19K | 3 |
Who runs and owns CMS Mechanical Services Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| S*** M*** | Director | Jun 2021 |
| S*** S*** | Director | Jun 2021 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| R*** C*** | Director | Jun 2021 | Mar 2026 |
People with significant control (2)
Where CMS Mechanical Services Ltd is registered
The registered office is in Belfast (BT4), in the Belfast local authority area, Northern Ireland. Show BT4 1GW on a map.
Other trade companies in BT4
- C&G Electrical (NI) LtdElectricians
- Belmont & Bond LtdProperty developers
- Seaside Living LtdMotor traders
- Cleaner Holmes LtdCleaning companies
- Glenview Glass and Glazing LimitedGlaziers
- Raphael Ventures LimitedMotor traders
- Sycamore Carpentry LtdJoiners and carpenters
- Raphael Ventures Ireland LimitedMotor traders
What happens if CMS Mechanical Services 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI679747
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 June 2021 (5 years ago)
- Registered office
- City East Business Centre, 68-72 Newtownards Road, Belfast, BT4 1GW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 28 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 Belfast
Other active plumbing and heating companies registered in Belfast.
- Coastline Heat Ltd2025
- Complete Heat Pump Services Ltd2025
- Connect Plumbers Limited2019
- D Christie Plumbing and Heating Ltd2023
- DG Gas Limited2025
- DG Gas Safety Ltd2016
- Direct Mechanical Services (2026) Ltd2026
- Dmac Gas Services Ltd2022
All plumbing and heating companies in Belfast · All trades in Belfast · Plumbers and heating engineers across the UK
Frequently asked questions
When are CMS Mechanical Services Ltd's accounts due?
CMS Mechanical Services Ltd's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is CMS Mechanical Services Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is CMS Mechanical Services Ltd still trading?
CMS Mechanical Services 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 CMS Mechanical Services Ltd do?
CMS Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is CMS Mechanical Services Ltd?
CMS Mechanical Services Ltd was incorporated on 2 June 2021, 5 years ago.
Who runs CMS Mechanical Services Ltd?
CMS Mechanical Services Ltd has 2 active directors, the longest-serving appointed in Jun 2021. Their names and service addresses are on the Companies House register.
Who owns CMS Mechanical Services Ltd?
2 people or companies have significant control of CMS Mechanical Services Ltd: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if CMS Mechanical Services 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 CMS Mechanical Services 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.