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- Siren Developments Limited
Company profile · Property developers
Siren Developments Limited
Siren Developments Limited is a 19-year-old private limited company registered in Sheffield, company number 06367644, one of 554 property development companies in Sheffield. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 30 September 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Siren Developments Limited over the years
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 unchanged on the year before, at -£2,791.
- Net assets rose in 1 of 9 year-on-year comparisons on record.
- Current assets of £560K against £328 owed within a year: more than 10 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | -£2,791 | £263 | £560K | £328 | 0 |
| 30 Sep 2024 | -£2,791 | £263 | £560K | £17K | 0 |
| 30 Sep 2023 | -£2,791 | £263 | £560K | £17K | 0 |
| 30 Sep 2022 | -£2,791 | £263 | £560K | £17K | 0 |
| 30 Sep 2021 | -£2,791 | £263 | £560K | £17K | 0 |
| 30 Sep 2020 | -£2,893 | £161 | £560K | £17K | 0 |
| 30 Sep 2019 | -£2,893 | £161 | £560K | £17K | 0 |
| 30 Sep 2018 | -£2,893 | £161 | £560K | £17K | |
| 30 Sep 2017 | -£2,893 | £161 | £560K | £17K | |
| 30 Sep 2016 | -£2,893 | £161 | £560K | £17K |
Where Siren Developments Limited is registered
The registered office is in Sheffield (S9), in the Sheffield local authority area, Yorkshire and The Humber. Show S9 1XH on a map.
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What happens if Siren 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 06367644
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 September 2007 (19 years ago)
- Registered office
- 7 Europa View, Sheffield Business Park, Sheffield, S9 1XH
- Nature of business
- Development of building projects (SIC 41100)
Buying and selling of own real estate (SIC 68100) - Year end
- 30 September (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 30 July 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 Sheffield
Other active property development companies registered in Sheffield.
- Sky-House Co. (Copper ST) Ltd2023
- Sky-House Co. (Fox Valley) Limited2004
- Sky-House Co. (Sylvester Gardens) Limited2025
- Sky-House Construct Limited2015
- Slater Woodhouse Developments Limited2024
- Smart Estate Services Ltd2025
- Southernwood Dore Limited2017
- Spatha Properties Limited2006
All property development companies in Sheffield · All trades in Sheffield · Property developers across the UK
Frequently asked questions
When are Siren Developments Limited's accounts due?
Siren Developments Limited's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Siren Developments Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Siren Developments Limited still trading?
Siren 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 Siren Developments Limited do?
Siren Developments Limited is registered under Development of building projects (SIC 41100); Buying and selling of own real estate (SIC 68100).
How old is Siren Developments Limited?
Siren Developments Limited was incorporated on 11 September 2007, 19 years ago.
What is the penalty if Siren 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 Siren 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.