- Companies
- Facilities management
- Uxbridge
- Castleline Developments Limited
Castleline Developments Limited
- Company number
- 09045608
- Incorporated
- 19 May 201412 years trading
- Registered office
- Unit 11 Trade City Business Park, Cowley Mill Road, Uxbridge, UB8 2DB
- Nature of business
- Combined facilities support activities
Castleline Developments Limited is a 12-year-old private limited company registered in Uxbridge, company number 09045608, one of 12 facilities management companies in Uxbridge. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £906 (-1.3%) on the year before, to £71K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £144K against £599K owed within a year: 0.2 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 Jan 2025 | £71K | £17K | £144K | £599K | 0 |
| 31 Jan 2024 | £72K | £13K | £124K | £536K | 0 |
| 31 Jan 2023 | £115K | £13K | £70K | £409K | 0 |
| 31 Jan 2022 | £125K | £12K | £40K | £339K | 2 |
| 31 May 2021 | £134K | £14K | £40K | £266K | 2 |
| 31 May 2020 | £111K | £92K | £30K | -2 | |
| 31 May 2019 | £65K | £32K | £252K | ||
| 31 May 2018 | £19K | £86K | £120K | ||
| 31 May 2017 | £18K | £60K | £42K | ||
| 31 May 2016 | £17K | £31K | £31K | £14K |
Where Castleline Developments Limited is registered
The registered office is in Uxbridge (UB8), in the Hillingdon local authority area, London. Show UB8 2DB on a map.
Other trade companies in UB8
- D-Towel LtdCleaning companies
- Sahi & Dhot Builders LtdBuilders
- Chas LtdBuilders
- Express Roofing LtdRoofers
- Boilercare Cover LtdPlumbers and heating engineers
- RMKK LtdBuilders
- Nayia Properties LtdProperty developers
- Dashi Carpentry LtdJoiners and carpenters
What happens if Castleline Developments 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 09045608
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 May 2014 (12 years ago)
- Registered office
- Unit 11 Trade City Business Park, Cowley Mill Road, Uxbridge, UB8 2DB
- Nature of business
- Combined facilities support activities (SIC 81100)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 21 March 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
Filing notes for facilities management companies
Facilities management companies usually invoice on contract, so accrued income and deferred income matter at the year end.
Similar companies in Uxbridge
Other active facilities management companies registered in Uxbridge.
- Clene Ltd2026
- D.Evergreen Ltd2026
- Menazel Ltd2015
- Old School Caretaker Limited2023
- Robbs Services Ltd2025
- Tanti Facilities Maagement Limited2026
- Templeholm Limited1975
- Tulipa Care Homes Limited2025
All facilities management companies in Uxbridge · All trades in Uxbridge · Facilities management across the UK
Frequently asked questions
When are Castleline Developments Limited's accounts due?
Castleline Developments Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Castleline Developments Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Castleline Developments Limited still trading?
Castleline Developments 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 Castleline Developments Limited do?
Castleline Developments Limited is registered under Combined facilities support activities (SIC 81100).
How old is Castleline Developments Limited?
Castleline Developments Limited was incorporated on 19 May 2014, 12 years ago.
What is the penalty if Castleline Developments 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 Castleline Developments 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.