- Companies
- Installers
- Glasgow
- Castle Construction Services Ltd
Castle Construction Services Ltd
- Company number
- SC674991
- Incorporated
- 21 Sep 20206 years trading
- Registered office
- 11 Castle Place, Uddingston, Glasgow, G71 7QH
- Nature of business
- Other construction installation
Castle Construction Services Ltd is a 6-year-old private limited company registered in Glasgow, company number SC674991, one of 331 installation companies (insulation, lifts, shutters and similar) in Glasgow. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £682 (-54.2%) on the year before, to £576.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £576 | £5,328 | 1 | ||
| 30 Sep 2024 | £1,258 | £4,900 | 1 | ||
| 30 Sep 2023 | £300 | £4,934 | 0 | ||
| 30 Sep 2022 | £5,450 | £3,608 | 0 | ||
| 30 Sep 2021 | £1 | £1 |
Where Castle Construction Services Ltd is registered
The registered office is in Glasgow (G71), in the South Lanarkshire local authority area, Scotland. Show G71 7QH on a map.
Other trade companies in G71
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- Oake Cleaning LtdCleaning companies
- Wali Cars LtdMotor traders
- Boom Electrical Glasgow LtdElectricians
- Cleansweep East Kilbride LimitedLandscapers and gardeners
- Cleansweep Glasgow LimitedCleaning companies
- Easy Stay Solutions LtdCleaning companies
What happens if Castle Construction 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- SC674991
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 September 2020 (6 years ago)
- Registered office
- 11 Castle Place, Uddingston, Glasgow, G71 7QH
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 18 September 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Glasgow
Other active installation companies (insulation, lifts, shutters and similar) registered in Glasgow.
- Castleton Contracts Limited2026
- Caucasia Padel UK Ltd2026
- CBS Kitchens & Bathrooms Ltd.2012
- CDF Mechanical Ltd2026
- Chris Ritchie Installations Limited2015
- City Health Clinic Edinburgh Limited1998
- Cja Property Maintenance Ltd2021
- Clyde Valley Maintenance and Renovation Ltd2026
All installation companies (insulation, lifts, shutters and similar) in Glasgow · All trades in Glasgow · Installers across the UK
Frequently asked questions
When are Castle Construction Services Ltd's accounts due?
Castle Construction Services Ltd's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Castle Construction Services Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Castle Construction Services Ltd still trading?
Castle Construction 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 Castle Construction Services Ltd do?
Castle Construction Services Ltd is registered under Other construction installation (SIC 43290).
How old is Castle Construction Services Ltd?
Castle Construction Services Ltd was incorporated on 21 September 2020, 6 years ago.
What is the penalty if Castle Construction 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 Castle Construction 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.