- Company number
- 12295421
- Incorporated
- 4 Nov 20196 years trading
- Registered office
- Flat 5 the Woodlands, High Road, London, N12 0DU
- Nature of business
- Construction of domestic buildings; Other retail sale not in stores, stalls or markets; Freight transport by road; Other cleaning services
Kasrox Ltd is a 6-year-old private limited company registered in London, company number 12295421, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 £6,461 (+30.9%) on the year before, to £27K.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- Current assets of £25K against £8,588 owed within a year: 2.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £27K | £5,923 | £25K | £8,588 | 2 |
| 30 Nov 2024 | £21K | £3,871 | £19K | £12K | 2 |
| 30 Nov 2023 | £10K | £1,001 | £12K | £7,971 | 2 |
| 30 Nov 2022 | -£3,245 | £2,384 | £6,611 | £10K | 2 |
| 30 Nov 2021 | -£4,258 | £8,675 | £11K | £12K | 2 |
| 30 Nov 2020 | -£147 | £7,880 | £13K | £9,490 | 2 |
Where Kasrox Ltd is registered
The registered office is in London (N12), in the Barnet local authority area, London. Show N12 0DU on a map.
Other trade companies in N12
- Sullivan Property and Maintenance LtdFacilities management
- Mael Property Services LtdFinishing trades
- Horizon Constructors LtdProperty developers
- Alfawine Group LimitedFinishing trades
- Sam Motors Group LimitedMotor traders
- Heating on Demand LtdPlumbers and heating engineers
- Premium Electrical LtdElectricians
- Amaiya Sparks LtdCleaning companies
What happens if Kasrox 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 12295421
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 November 2019 (6 years ago)
- Registered office
- Flat 5 the Woodlands, High Road, London, N12 0DU
- Nature of business
- Construction of domestic buildings (SIC 41202)
Other retail sale not in stores, stalls or markets (SIC 47990)
Freight transport by road (SIC 49410)
Other cleaning services (SIC 81299) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 1 November 2025
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 London
Other active building contractors registered in London.
- Kastra Construction Ltd2025
- Kastrati Roofing Ltd2025
- Kasu Ltd2014
- Kat Drylining & Cladding Ltd2022
- Katchall Construction Limited2002
- Kato Develop Ltd2025
- Kaville Properties Ltd2020
- Kavod Contracting Ltd2025
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Kasrox Ltd's accounts due?
Kasrox Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Kasrox Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Kasrox Ltd still trading?
Kasrox 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 Kasrox Ltd do?
Kasrox Ltd is registered under Construction of domestic buildings (SIC 41202); Other retail sale not in stores, stalls or markets (SIC 47990); Freight transport by road (SIC 49410); Other cleaning services (SIC 81299).
How old is Kasrox Ltd?
Kasrox Ltd was incorporated on 4 November 2019, 6 years ago.
What is the penalty if Kasrox 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 Kasrox 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.