- Companies
- Installers
- Carluke
- Castlehill Installations Ltd
Castlehill Installations Ltd
- Company number
- SC815427
- Incorporated
- 3 Jul 20242 years trading
- Registered office
- Block 2 , Unit 5 Castlehill Industrial Estate, Threave Court, Carluke, Lanarkshire, ML8 5UF
- Nature of business
- Other construction installation
Castlehill Installations Ltd is a 2-year-old private limited company registered in Carluke, company number SC815427, one of 6 installation companies (insulation, lifts, shutters and similar) in Carluke. 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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Financial snapshot, 2025
From the balance sheet at 31 July 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Where Castlehill Installations Ltd is registered
The registered office is in Carluke (ML8), in the South Lanarkshire local authority area, Scotland. Show ML8 5UF on a map.
Other trade companies in ML8
- Browns Vehicle Repair & MOT Centre LtdMechanics and garages
- Glasgow Dyson Centre LimitedMachinery repair and installation
- LBT Industrial LtdScaffolders
- D L Plumbing Services LtdPlumbers and heating engineers
- S Gallagher Developments LtdBuilders
- Aitken Utilities LtdCivil engineering
- CRJ Joinery LtdJoiners and carpenters
- Belhaven Autos LtdMotor traders
What happens if Castlehill Installations 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
- SC815427
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 July 2024 (2 years ago)
- Registered office
- Block 2 , Unit 5 Castlehill Industrial Estate, Threave Court, Carluke, Lanarkshire, ML8 5UF
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 2 July 2025
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 Carluke
Other active installation companies (insulation, lifts, shutters and similar) registered in Carluke.
- Clyde Valley Ltd2025
- Frameerect Ltd2025
- Gravitygroundworks Limited2025
- HD Mechanical and Building Services Limited2026
- HSL Scotland Ltd2026
All installation companies (insulation, lifts, shutters and similar) in Carluke · All trades in Carluke · Installers across the UK
Frequently asked questions
When are Castlehill Installations Ltd's accounts due?
Castlehill Installations 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 Castlehill Installations 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 Castlehill Installations Ltd still trading?
Castlehill Installations Ltd is listed as active on the Companies House register (checked 12 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 Castlehill Installations Ltd do?
Castlehill Installations Ltd is registered under Other construction installation (SIC 43290).
How old is Castlehill Installations Ltd?
Castlehill Installations Ltd was incorporated on 3 July 2024, 2 years ago.
What is the penalty if Castlehill Installations 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 Castlehill Installations Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.