- Companies
- Plumbers and heating engineers
- Irvine
- William Carson (Plumbing & Heating) Limited
William Carson (Plumbing & Heating) Limited
- Company number
- SC538286
- Incorporated
- 20 Jun 201610 years trading
- Registered office
- Suite 3, the Business Centre, 5 Portland Road, Irvine, KA12 8JE
- Nature of business
- Plumbing, heat and air-conditioning installation
William Carson (Plumbing & Heating) Limited is a 10-year-old private limited company registered in Irvine, company number SC538286, one of 17 plumbing and heating companies in Irvine. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 £5,235 (-47.5%) on the year before, to £5,776.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £30K against £26K owed within a year: 1.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Jun 2025 | £5,776 | £30K | £26K | 2 | |
| 30 Jun 2024 | £11K | £33K | £25K | 2 | |
| 30 Jun 2023 | £31K | £77K | £49K | 2 | |
| 30 Jun 2022 | £27K | £77K | £59K | 4 | |
| 30 Jun 2021 | £14K | £51K | £47K | 5 | |
| 30 Jun 2020 | £6,016 | £31K | £34K | 7 | |
| 30 Jun 2019 | £23K | £73K | £41K | ||
| 30 Jun 2018 | £30K | £88K | £58K | ||
| 30 Jun 2017 | £8,421 | £2,327 | £40K | £18K |
Where William Carson (Plumbing & Heating) Limited is registered
The registered office is in Irvine (KA12), in the North Ayrshire local authority area, Scotland. Show KA12 8JE on a map.
Other trade companies in KA12
- Kme Services LimitedElectricians
- Yazmaco LtdMotor traders
- DG Auto's (Ayrshire) LtdMechanics and garages
- A1MB LtdCleaning companies
- Pristine Property Care LtdCleaning companies
- McDougall Aviation LtdMachinery repair and installation
- Insulclad LtdInstallers
- MC & JC Scaffolding LtdScaffolders
What happens if William Carson (Plumbing & Heating) 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- SC538286
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 June 2016 (10 years ago)
- Registered office
- Suite 3, the Business Centre, 5 Portland Road, Irvine, KA12 8JE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 13 June 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 Irvine
Other active plumbing and heating companies registered in Irvine.
- Annick Group Ltd2023
- Ayrshire Gasworks Ltd2013
- Calidus Ltd2025
- Chrystal Energy Limited2013
- Cutting Edge Improvements Limited2003
- David Thomson Gas Services Ltd2022
- DW Gas & Plumbing Services (Ayrshire) Ltd2024
- E Morrison Plumbing & Heating Ltd2019
All plumbing and heating companies in Irvine · All trades in Irvine · Plumbers and heating engineers across the UK
Frequently asked questions
When are William Carson (Plumbing & Heating) Limited's accounts due?
William Carson (Plumbing & Heating) Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is William Carson (Plumbing & Heating) Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is William Carson (Plumbing & Heating) Limited still trading?
William Carson (Plumbing & Heating) 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 William Carson (Plumbing & Heating) Limited do?
William Carson (Plumbing & Heating) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is William Carson (Plumbing & Heating) Limited?
William Carson (Plumbing & Heating) Limited was incorporated on 20 June 2016, 10 years ago.
What is the penalty if William Carson (Plumbing & Heating) 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 William Carson (Plumbing & Heating) 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.