- Companies
- Property developers
- London
- West Side Building Ltd
West Side Building Ltd
- Company number
- 15557346
- Incorporated
- 12 Mar 20242 years trading
- Registered office
- 3 Alfred Road, London, W3 6LH
- Nature of business
- Development of building projects
West Side Building Ltd is a 2-year-old private limited company registered in London, company number 15557346, one of 14,100 property development companies in London. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where West Side Building Ltd is registered
The registered office is in London (W3), in the Ealing local authority area, London. Show W3 6LH on a map.
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What happens if West Side Building 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 15557346
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 March 2024 (2 years ago)
- Registered office
- 3 Alfred Road, London, W3 6LH
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 11 March 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in London
Other active property development companies registered in London.
- West Street Da Ltd2025
- West Street Property Development Company Ltd2021
- West Village Investments Ltd2021
- West Warsaw Holding Ltd2024
- West Wing Solutions Ltd2022
- West Wittering Developments Limited2019
- Westborough Property Limited2024
- Westbourne Arcades Limited2001
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are West Side Building Ltd's accounts due?
West Side Building Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is West Side Building Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is West Side Building Ltd still trading?
West Side Building 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 West Side Building Ltd do?
West Side Building Ltd is registered under Development of building projects (SIC 41100).
How old is West Side Building Ltd?
West Side Building Ltd was incorporated on 12 March 2024, 2 years ago.
What is the penalty if West Side Building 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 West Side Building 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.