- Companies
- Plumbers and heating engineers
- Aberdeen
- Cas Duncan Ltd
Cas Duncan Ltd
- Company number
- SC660201
- Incorporated
- 30 Apr 20206 years trading
- Registered office
- 222 Hardgate, Aberdeen, AB10 6AA
- Nature of business
- Plumbing, heat and air-conditioning installation
Cas Duncan Ltd is a 6-year-old private limited company registered in Aberdeen, company number SC660201, one of 82 plumbing and heating companies in Aberdeen. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £78K (+5.9%) on the year before, to £1.4M.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £1.1M against £734K owed within a year: 1.5 times cover.
- 34 employees on average, down from 38 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Jul 2025 | £1.4M | £500K | £1.1M | £734K | 34 |
| 31 Jul 2024 | £1.3M | £417K | £918K | £689K | 38 |
| 31 Jul 2023 | £1.1M | £365K | £1.1M | £978K | 37 |
| 31 Jul 2022 | £2 | £2 | |||
| 30 Apr 2021 | £2 |
Who runs and owns Cas Duncan Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (5)
| Name | Role | Appointed |
|---|---|---|
| C*** D*** | Director | Apr 2020 |
| M*** D*** | Director | Apr 2020 |
| A*** D*** | Director | Jul 2022 |
| S*** H*** | Director | Jul 2022 |
| E*** H*** | Director | Oct 2022 |
People with significant control (2)
Where Cas Duncan Ltd is registered
The registered office is in Aberdeen (AB10), in the Aberdeen City local authority area, Scotland. Show AB10 6AA on a map.
Other trade companies in AB10
- S&S Elite Roofing LtdRoofers
- Dunic Home Improvements LtdBuilders
- Halloclean LtdCleaning companies
- Ephphatha Painting Services LtdPainters and decorators
- Wecome2Fix LimitedRepair services
- M & S Windows & Doors LtdGlaziers
- Sijibomi LimitedRepair services
- Granite Design and Build LtdBuilders
What happens if Cas Duncan 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- SC660201
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 30 April 2020 (6 years ago)
- Registered office
- 222 Hardgate, Aberdeen, AB10 6AA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 29 April 2026
- Previous names
- C. A. S. Duncan Ltd (until 15 Jun 2022)
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 Aberdeen
Other active plumbing and heating companies registered in Aberdeen.
- City & Shire Heating Specialists Ltd2015
- Clarkson Heating Limited2015
- Countesswells Plumbing & Heating Limited2022
- CRG Plumbing & Heating Ltd2025
- D Cowie Plumbing & Heating Ltd2022
- Deeside Plumbing and Heating Ltd2018
- Dixon Gas Services Ltd2020
- DK Boiler Care Ltd2026
All plumbing and heating companies in Aberdeen · All trades in Aberdeen · Plumbers and heating engineers across the UK
Frequently asked questions
When are Cas Duncan Ltd's accounts due?
Cas Duncan Ltd's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Cas Duncan Ltd's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Cas Duncan Ltd still trading?
Cas Duncan 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 Cas Duncan Ltd do?
Cas Duncan Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Cas Duncan Ltd?
Cas Duncan Ltd was incorporated on 30 April 2020, 6 years ago.
Who runs Cas Duncan Ltd?
Cas Duncan Ltd has 5 active directors, the longest-serving appointed in Apr 2020. Their names and service addresses are on the Companies House register.
Who owns Cas Duncan Ltd?
2 people or companies have significant control of Cas Duncan Ltd: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if Cas Duncan 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 Cas Duncan 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.