- Companies
- Plumbers and heating engineers
- Devlin Mechanical Limited
Devlin Mechanical Limited
- Company number
- NI059343
- Incorporated
- 12 May 200620 years trading
- Registered office
- 4 Carlane Road, Toomebridge, Co Antrim, BT41 3NT
- Nature of business
- Plumbing, heat and air-conditioning installation
Devlin Mechanical Limited is a 20-year-old private limited company registered in Co Antrim, company number NI059343, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Public contracts won
Devlin Mechanical Limited has 3 public sector contract awards on record; the ones with their own published value total £249K, from 2022 to 2026. Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Derry City and Strabane District Council1 award
- Armagh, Banbridge & Craigavon Borough Council1 award
- CPD - Construction Health Projects1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Derry City and Strabane District Council | T25-153ENV Replacement Gas Boiler and Flue, Council Offices, Derry | 9 Feb 2026 | |
| Armagh, Banbridge & Craigavon Borough Council | Replacement Boilers and Oil Tanks Replacement Scheme | 10 Nov 2025 | |
| CPD - Construction Health Projects | SE3661359M - Replacement Chiller plant at Downe Hospital | £249K | 26 May 2022 |
Where Devlin Mechanical Limited is registered
The registered office is in Co Antrim (BT41), in the Antrim and Newtownabbey local authority area, Northern Ireland. Show BT41 3NT on a map.
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What happens if Devlin Mechanical 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI059343
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 May 2006 (20 years ago)
- Registered office
- 4 Carlane Road, Toomebridge, Co Antrim, BT41 3NT
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 12 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
Other active plumbing and heating companies.
Frequently asked questions
When are Devlin Mechanical Limited's accounts due?
Devlin Mechanical Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Devlin Mechanical Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Devlin Mechanical Limited still trading?
Devlin Mechanical 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 Devlin Mechanical Limited do?
Devlin Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Devlin Mechanical Limited?
Devlin Mechanical Limited was incorporated on 12 May 2006, 20 years ago.
Has Devlin Mechanical Limited won public sector contracts?
Yes. Devlin Mechanical Limited has 3 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £249K), most recently from Derry City and Strabane District Council.
What is the penalty if Devlin Mechanical 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 Devlin Mechanical 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.