- Companies
- Plumbers and heating engineers
- Larne
- CD Mechanical Services Ltd
CD Mechanical Services Ltd
- Company number
- NI669587
- Incorporated
- 20 May 20206 years trading
- Registered office
- Suite 4 Commercial Mews, 93-97 Main Street, Larne, BT40 1HJ
- Nature of business
- Plumbing, heat and air-conditioning installation
CD Mechanical Services Ltd is a 6-year-old private limited company registered in Larne, company number NI669587, one of 9 plumbing and heating companies in Larne. Its next accounts are due at Companies House on 23 November 2026, and the CT600 for the period to 23 February 2026 is due at HMRC on 23 February 2027.
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 £8,021 (+282.9%) on the year before, to £11K.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £211 against £56K owed within a year: 0.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £11K | £211 | £56K | 1 | |
| 28 Feb 2024 | £2,835 | £13K | £65K | 1 | |
| 28 Feb 2023 | £3,357 | £26K | £89K | 1 | |
| 28 Feb 2022 | £100 | £100 | |||
| 31 May 2021 | £100 | £100 |
Where CD Mechanical Services Ltd is registered
The registered office is in Larne (BT40), in the Mid and East Antrim local authority area, Northern Ireland. Show BT40 1HJ on a map.
Other trade companies in BT40
- GW Home Improvements and Maintenance LtdBuilders
- East Coast Contracting NI LtdBuilders
- Abbey Washing Machines LtdRepair services
- CM Fit Out & Construction LtdJoiners and carpenters
- Blackwood & Crawford LtdProperty developers
- TT Tiling LtdFloor and wall tilers
- JM Servicess LtdSpecialist contractors
- NPH Heating and Plumbing LtdPlumbers and heating engineers
Shared registered office
72 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if CD 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 23 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 24 Nov 2026 to 23 Dec 2026 | £150 |
| 1 to 3 months late | 24 Dec 2026 to 23 Feb 2027 | £375 |
| 3 to 6 months late | 24 Feb 2027 to 23 May 2027 | £750 |
| More than 6 months late | From 24 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 24 Feb 2027 | £200 |
| 3 months late | 23 May 2027 | another £200 |
| 6 months late | 23 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 23 Feb 2028 | 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
- NI669587
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 May 2020 (6 years ago)
- Registered office
- Suite 4 Commercial Mews, 93-97 Main Street, Larne, BT40 1HJ
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 23 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 19 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 Larne
Other active plumbing and heating companies registered in Larne.
- Drainsbay Utilities Ltd2025
- M&DT Plumbing and Heating Ltd2021
- Mastercraft Plumbing Limited2026
- NPH Heating and Plumbing Ltd2026
- The Gas Man (N.I.) Ltd2019
- Uel O'Neill Ltd2013
- B9 Energy Storage Ltd2011
- Boiler Cure NI Ltd2016
All plumbing and heating companies in Larne · All trades in Larne · Plumbers and heating engineers across the UK
Frequently asked questions
When are CD Mechanical Services Ltd's accounts due?
CD Mechanical Services Ltd's next accounts are due at Companies House by 23 November 2026 (in 42 days), covering the period to 23 February 2026.
When is CD Mechanical Services Ltd's CT600 due?
The CT600 for the period to 23 February 2026 is due at HMRC by 23 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 24 November 2026.
Is CD Mechanical Services Ltd still trading?
CD 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 CD Mechanical Services Ltd do?
CD Mechanical Services Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is CD Mechanical Services Ltd?
CD Mechanical Services Ltd was incorporated on 20 May 2020, 6 years ago.
What is the penalty if CD 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 CD 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.