- Companies
- Cleaning companies
- London
- Castle Windows Service Ltd
Castle Windows Service Ltd
- Company number
- 13059223
- Incorporated
- 3 Dec 20205 years trading
- Registered office
- Flat 7 Cypress Lodge, Cypress Road, London, SE25 4BA
- Nature of business
- General cleaning of buildings; Window cleaning services
Castle Windows Service Ltd is a 5-year-old private limited company registered in London, company number 13059223, one of 5,627 cleaning companies in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Castle Windows Service LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £839 (+361.6%) on the year before, to £1,071.
- Net assets rose in 3 of 4 year-on-year comparisons on record.
- Current assets of £79K against £84K owed within a year: 0.9 times cover.
- 2 employees on average, up from 1 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 Dec 2025 | £1,071 | £79K | £84K | 2 | |
| 31 Dec 2024 | £232 | £61K | £68K | 1 | |
| 31 Dec 2023 | £70 | £32K | £41K | 1 | |
| 31 Dec 2022 | £23 | £20K | £31K | 1 | |
| 31 Dec 2021 | £108 | £2,124 | £17K | 1 |
Where Castle Windows Service Ltd is registered
The registered office is in London (SE25), in the Croydon local authority area, London. Show SE25 4BA on a map.
Other trade companies in SE25
- Luna Plumbing LtdPlumbers and heating engineers
- Mendivra LtdJoiners and carpenters
- Squeaky Mastery Services LtdCleaning companies
- MM(P)M LtdProperty developers
- Meysam Electrical LtdElectricians
- Madej Property Maintenance LtdFinishing trades
- Leonardo Bespoke Joinery LtdJoiners and carpenters
- GCS Electrical Services LimitedElectricians
What happens if Castle Windows Service 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 13059223
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 December 2020 (5 years ago)
- Registered office
- Flat 7 Cypress Lodge, Cypress Road, London, SE25 4BA
- Nature of business
- General cleaning of buildings (SIC 81210)
Window cleaning services (SIC 81221) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 30 October 2025
Filing notes for cleaning companies
Cleaning companies are often staff-heavy, so wages, pension contributions and the employment allowance all show up in the accounts.
Similar companies in London
Other active cleaning companies registered in London.
- Cat N Mouse Ltd2011
- Catch'a Rat Limited2026
- Cathabel Healthcare Services Ltd2026
- Cavalier Detailing Ltd2023
- Caz Cleaning Services Limited2010
- CB Clean Ltd2026
- CB Cleaning Solutions Ltd2026
- CB Valeting Ltd2025
All cleaning companies in London · All trades in London · Cleaning companies across the UK
Frequently asked questions
When are Castle Windows Service Ltd's accounts due?
Castle Windows Service Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Castle Windows Service Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Castle Windows Service Ltd still trading?
Castle Windows Service 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 Windows Service Ltd do?
Castle Windows Service Ltd is registered under General cleaning of buildings (SIC 81210); Window cleaning services (SIC 81221).
How old is Castle Windows Service Ltd?
Castle Windows Service Ltd was incorporated on 3 December 2020, 5 years ago.
What is the penalty if Castle Windows Service 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 Windows Service 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.