- Companies
- Plumbers and heating engineers
- James Mackie (Plumbers) Limited
James Mackie (Plumbers) Limited
- Company number
- SC114136
- Incorporated
- 21 Oct 198837 years trading
- Registered office
- 1 Tams Brig, Ayr, KA8 8DF
- Nature of business
- Plumbing, heat and air-conditioning installation
James Mackie (Plumbers) Limited is a 37-year-old private limited company, company number SC114136, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 down £52K (-6.1%) on the year before, to £798K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £952K against £216K owed within a year: 4.4 times cover.
- 21 employees on average, down from 23 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £798K | £682K | £952K | £216K | 21 |
| 31 Dec 2024 | £850K | £700K | £994K | £217K | 23 |
| 31 Dec 2023 | £876K | £642K | £1.1M | £236K | 22 |
| 31 Dec 2022 | £999K | £769K | £1.2M | £265K | 24 |
| 31 Dec 2021 | £987K | £770K | £1.2M | £249K | 23 |
| 31 Dec 2020 | £1M | £644K | £1.3M | £213K | 27 |
| 31 Dec 2019 | £1.1M | £452K | £1.4M | £331K | 26 |
| 30 Sep 2018 | £1.1M | £928K | £1.4M | £241K | 23 |
| 30 Sep 2017 | £1.1M | £797K | £1.3M | £224K | 23 |
| 30 Sep 2016 | £1.1M | £795K | £1.4M | £354K |
Where James Mackie (Plumbers) Limited is registered
The registered office is in the KA8 postcode district, in the South Ayrshire local authority area, Scotland. Show KA8 8DF on a map.
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- Caledonian Roofing Contractors LimitedRoofers
- Platinum Gleam LtdCleaning companies
- DWD Plumbing & Handyman Services LtdPlumbers and heating engineers
- GMRS Solar LtdElectricians
- First Roadside Assistance LtdMechanics and garages
- Elev8Or Xchange LimitedMachinery repair and installation
What happens if James Mackie (Plumbers) 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- SC114136
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 October 1988 (37 years ago)
- Registered office
- 1 Tams Brig, Ayr, KA8 8DF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 31 December 2025
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.
- Michael Young Plumbing & Heating Engineers Limited1990
- Munro Heating and Plumbing Engineers Limited1992
- John Cullen & Sons Ltd.1992
- Matheson Plumbing Company Limited1992
- Comfort Plumbing and Heating Limited1993
- Atlas Air Conditioning Ltd.1993
- WM. Donnelly & Company Limited1993
- Chas. Stewart Plumbing & Heating Engineers Ltd.1994
Frequently asked questions
When are James Mackie (Plumbers) Limited's accounts due?
James Mackie (Plumbers) Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is James Mackie (Plumbers) Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is James Mackie (Plumbers) Limited still trading?
James Mackie (Plumbers) 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 James Mackie (Plumbers) Limited do?
James Mackie (Plumbers) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is James Mackie (Plumbers) Limited?
James Mackie (Plumbers) Limited was incorporated on 21 October 1988, 37 years ago.
What is the penalty if James Mackie (Plumbers) 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 James Mackie (Plumbers) 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.