- Companies
- Property developers
- London
- Sia UK Investments Ltd
Sia UK Investments Ltd
- Company number
- 11722227
- Incorporated
- 11 Dec 20187 years trading
- Registered office
- 128 City Road, London, City Road, London, EC1V 2NX
- Nature of business
- Development of building projects; Unlicensed restaurants and cafes; Buying and selling of own real estate; Real estate agencies
Sia UK Investments Ltd is a 7-year-old private limited company registered in London, company number 11722227, one of 14,100 property development companies in London. Companies House shows its accounts as overdue: they were due on 30 September 2026.
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 up £13K (+100%) on the year before, to £1.
- Net assets rose in 1 of 5 year-on-year comparisons on record.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 6 years, 2019 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2024 | £1 | £0 | 0 | ||
| 31 Dec 2023 | -£13K | £16 | £1.5M | £1.4M | 0 |
| 31 Dec 2022 | -£10K | £111 | £1.5M | £1.4M | 0 |
| 31 Dec 2021 | -£10K | £30 | £472K | £446K | 0 |
| 31 Dec 2020 | -£7,459 | £65 | £5,616 | £14K | 0 |
| 31 Dec 2019 | £1,048 | £49 | £808 | £1,500 | 0 |
Where Sia UK Investments Ltd is registered
The registered office is in London (EC1V), in the Islington local authority area, London. Show EC1V 2NX on a map.
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Also registered at this address
3 other companies use the same registered office as Sia UK Investments Ltd.
- Bey Grup LimitedSpecialist contractors
- London Fire Door Installations LtdInstallers
- Starville Contracting LimitedBuilders
What happens if Sia UK Investments Ltd files late
If the accounts reach Companies House today, the late filing penalty is £150 (£300 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2026 to 31 Oct 2026 | £150 |
| 1 to 3 months late | 1 Nov 2026 to 31 Dec 2026 | £375 |
| 3 to 6 months late | 1 Jan 2027 to 31 Mar 2027 | £750 |
| More than 6 months late | From 1 Apr 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2027 | £200 |
| 3 months late | 31 Mar 2027 | another £200 |
| 6 months late | 30 Jun 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2027 | 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
- 11722227
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 December 2018 (7 years ago)
- Registered office
- 128 City Road, London, City Road, London, EC1V 2NX
- Nature of business
- Development of building projects (SIC 41100)
Unlicensed restaurants and cafes (SIC 56102)
Buying and selling of own real estate (SIC 68100)
Real estate agencies (SIC 68310) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2024
- Last confirmation statement
- 8 April 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.
- Siatso UK Limited2025
- Sibell Trading Limited2002
- Sicoda Limited2018
- Sid and Sons Ltd2023
- Sidcup Developments Limited2018
- Sidney Bolsom Investment Trust Limited1934
- Sidom Property Development Ltd2026
- Siena Agency Limited2018
All property development companies in London · All trades in London · Property developers across the UK
Frequently asked questions
When are Sia UK Investments Ltd's accounts due?
Sia UK Investments Ltd's accounts were due at Companies House on 30 September 2026 and the register shows them as overdue.
When is Sia UK Investments Ltd's CT600 due?
The CT600 for the period to 31 December 2025 is due at HMRC by 31 December 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2026.
Is Sia UK Investments Ltd still trading?
Sia UK Investments Ltd is listed as active on the Companies House register (checked 13 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 Sia UK Investments Ltd do?
Sia UK Investments Ltd is registered under Development of building projects (SIC 41100); Unlicensed restaurants and cafes (SIC 56102); Buying and selling of own real estate (SIC 68100); Real estate agencies (SIC 68310).
How old is Sia UK Investments Ltd?
Sia UK Investments Ltd was incorporated on 11 December 2018, 7 years ago.
What is the penalty if Sia UK Investments 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 Sia UK Investments Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.