- Company number
- 16223221
- Incorporated
- 2 Feb 20251 year trading
- Registered office
- 32 Amersall Road, Doncaster, DN5 9LF
- Nature of business
- Construction of commercial buildings
Sirius Solar Installations Ltd is a 1-year-old private limited company registered in Doncaster, company number 16223221, one of 306 building contractors in Doncaster. Its next accounts are due at Companies House on 2 November 2026, and its first CT600 is due at HMRC on 1 February 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Sirius Solar Installations Ltd is registered
The registered office is in Doncaster (DN5), in the Doncaster local authority area, Yorkshire and The Humber. Show DN5 9LF on a map.
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What happens if Sirius Solar Installations 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 2 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 3 Nov 2026 to 2 Dec 2026 | £150 |
| 1 to 3 months late | 3 Dec 2026 to 2 Feb 2027 | £375 |
| 3 to 6 months late | 3 Feb 2027 to 2 May 2027 | £750 |
| More than 6 months late | From 3 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 16223221
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 February 2025 (1 year ago)
- Registered office
- 32 Amersall Road, Doncaster, DN5 9LF
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 1 February 2026
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Doncaster
Other active building contractors registered in Doncaster.
- Sky Roofing Systems Ltd2026
- Slater Building Solutions Limited2014
- Smith & Sons Property Ltd2025
- Southview Developments Ltd2013
- Spandrel Homes Ltd2012
- Springside Property Developments Limited2008
- Stainton Construction Ltd2008
- Steve Hobson Building & Joinery Ltd2013
All building contractors in Doncaster · All trades in Doncaster · Builders across the UK
Frequently asked questions
When are Sirius Solar Installations Ltd's accounts due?
Sirius Solar Installations Ltd's next accounts are due at Companies House by 2 November 2026 (in 20 days), covering the period to 28 February 2026.
When is Sirius Solar Installations Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 1 February 2026, due by 1 February 2027, and one for the period to 28 February 2026, due by 28 February 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Sirius Solar Installations Ltd still trading?
Sirius Solar Installations 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 Sirius Solar Installations Ltd do?
Sirius Solar Installations Ltd is registered under Construction of commercial buildings (SIC 41201).
How old is Sirius Solar Installations Ltd?
Sirius Solar Installations Ltd was incorporated on 2 February 2025, 1 year ago.
What is the penalty if Sirius Solar Installations 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 Sirius Solar Installations 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.