- Company number
- 15173991
- Incorporated
- 29 Sep 20233 years trading
- Registered office
- JSP Accountants Ltd First Floor, 10 College Road, Harrow, Middlesex, HA1 1BE
- Nature of business
- Roofing activities
Blackstone Building Solutions Ltd is a 3-year-old private limited company registered in Harrow, company number 15173991, one of 46 roofing companies in Harrow. 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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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 £4,690 (+220.9%) on the year before, to £6,813.
- Current assets of £3,386 against £10K owed within a year: 0.3 times cover.
- 1 employee on average during the year.
- 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £6,813 | £3,386 | £10K | 1 | |
| 30 Sep 2024 | £2,123 | £601 | £2,724 | 1 |
Where Blackstone Building Solutions Ltd is registered
The registered office is in Harrow (HA1), in the Harrow local authority area, London. Show HA1 1BE on a map.
Other trade companies in HA1
- Cabos Electrical LimitedElectricians
- Mia Maria Services LtdCleaning companies
- Ac Operations LtdScaffolders
- Verde Masters LtdLandscapers and gardeners
- Omega Works Group LtdLandscapers and gardeners
- Call 'Em LimitedPlumbers and heating engineers
- Swan Roofing Services LimitedRoofers
- DRV Property Solutions LtdPainters and decorators
Also registered at this address
4 other companies use the same registered office as Blackstone Building Solutions Ltd.
- Blackstone Roofing LtdRoofers
- Encore Tavistock LtdProperty developers
- Esb Venture LtdProperty developers
- SSS Properties Maintenance LtdProperty developers
What happens if Blackstone Building Solutions 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 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
- 15173991
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 September 2023 (3 years ago)
- Registered office
- JSP Accountants Ltd First Floor, 10 College Road, Harrow, Middlesex, HA1 1BE
- Nature of business
- Roofing activities (SIC 43910)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 28 September 2025
- Previous names
- Platinum Roof Cure Ltd (until 17 Jun 2025)
Filing notes for roofing companies
Roofing companies commonly work under CIS and run vans and access equipment, so CIS deductions and capital allowances are the two things to get right.
Similar companies in Harrow
Other active roofing companies registered in Harrow.
- Blackstone Roofing Ltd2024
- Chilton Roofing & Guttering Limited2025
- City Building and Roofing Ltd2018
- Colne Valley Roofing & Building Limited2021
- DC Roofing and Maintenance Limited2026
- Ej Roofing Services Limited2021
- Gavan Roofing Ltd2016
- Greywolf Roofing Limited2020
All roofing companies in Harrow · All trades in Harrow · Roofers across the UK
Frequently asked questions
When are Blackstone Building Solutions Ltd's accounts due?
Blackstone Building Solutions Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Blackstone Building Solutions Ltd'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 Blackstone Building Solutions Ltd still trading?
Blackstone Building Solutions 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 Blackstone Building Solutions Ltd do?
Blackstone Building Solutions Ltd is registered under Roofing activities (SIC 43910).
How old is Blackstone Building Solutions Ltd?
Blackstone Building Solutions Ltd was incorporated on 29 September 2023, 3 years ago.
What is the penalty if Blackstone Building Solutions 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 Blackstone Building Solutions 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.