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- Blacksheep Windows Ltd
Company profile · Specialist contractors
Blacksheep Windows Ltd
Blacksheep Windows Ltd is a 2-year-old private limited company registered in Peterborough, company number 15289660, one of 150 specialist construction companies in Peterborough. 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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Blacksheep Windows Ltd 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 up £31K (+645.9%) on the year before, to £35K.
- Current assets of £56K against £27K owed within a year: 2.1 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £35K | £56K | £27K | 2 | |
| 31 Mar 2024 | £4,747 | £37K | £62K | 1 |
Where Blacksheep Windows Ltd is registered
The registered office is in Peterborough (PE2), in the Peterborough local authority area, East of England. Show PE2 8UQ on a map.
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- PR Healthcare and Facility Management LimitedCleaning companies
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What happens if Blacksheep Windows 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
- 15289660
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 November 2023 (2 years ago)
- Registered office
- 16 Peckover Close, Peterborough, PE2 8UQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 15 November 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Peterborough
Other active specialist construction companies registered in Peterborough.
- Blade Architectural Glazing Limited2026
- Bluegate Amb Ltd2026
- Canham Controls Limited1990
- CCG Construction & Civils Limited2026
- Chakk Group Ltd2023
- Chantry Renovations Limited2023
- Chris Hawk Services Limited2013
- CK-Tech Ltd2013
All specialist construction companies in Peterborough · All trades in Peterborough · Specialist contractors across the UK
Frequently asked questions
When are Blacksheep Windows Ltd's accounts due?
Blacksheep Windows Ltd's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Blacksheep Windows 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 Blacksheep Windows Ltd still trading?
Blacksheep Windows 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 Blacksheep Windows Ltd do?
Blacksheep Windows Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Blacksheep Windows Ltd?
Blacksheep Windows Ltd was incorporated on 16 November 2023, 2 years ago.
What is the penalty if Blacksheep Windows 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 Blacksheep Windows 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.