- Companies
- Finishing trades
- London
- Kostek Ltd
Kostek Ltd
- Company number
- 17060292
- Incorporated
- 27 Feb 2026
- Registered office
- 514 Hornsey Road, London, N19 3QN
- Nature of business
- Other building completion and finishing; General cleaning of buildings
Kostek Ltd is a newly incorporated private limited company registered in London, company number 17060292, one of 3,947 building finishing companies in London. Its next accounts are due at Companies House on 27 November 2027, and its first CT600 is due at HMRC on 26 February 2028.
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 Kostek Ltd is registered
The registered office is in London (N19), in the Islington local authority area, London. Show N19 3QN on a map.
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- Rams Property Services LtdSpecialist contractors
- Lushi Plumbing and Heating LtdPlumbers and heating engineers
- One Fix Gutter Solutions LtdRoofers
- Mmway Construction LtdSpecialist contractors
- Elio's Landscaping Ltd LtdBuilders
- Novix Smart Wash LtdMachinery repair and installation
- Alex Maintenance LtdPainters and decorators
What happens if Kostek 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 27 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 28 Nov 2027 to 27 Dec 2027 | £150 |
| 1 to 3 months late | 28 Dec 2027 to 27 Feb 2028 | £375 |
| 3 to 6 months late | 28 Feb 2028 to 27 May 2028 | £750 |
| More than 6 months late | From 28 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 17060292
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 February 2026
- Registered office
- 514 Hornsey Road, London, N19 3QN
- Nature of business
- Other building completion and finishing (SIC 43390)
General cleaning of buildings (SIC 81210) - Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in London
Other active building finishing companies registered in London.
- Kostia G Limited2017
- Koti Renovations Ltd2026
- Koulermos Building Contractors Limited2019
- Kowalsky Ltd2017
- Koylink Services Ltd2026
- Kozak Pro Solutions Ltd2026
- Kozen Ltd2026
- KPM Solution Limited2026
All building finishing companies in London · All trades in London · Finishing trades across the UK
Frequently asked questions
When are Kostek Ltd's accounts due?
Kostek Ltd's next accounts are due at Companies House by 27 November 2027 (in 411 days), covering the period to 28 February 2027.
When is Kostek 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 26 February 2027, due by 26 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Kostek Ltd still trading?
Kostek 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 Kostek Ltd do?
Kostek Ltd is registered under Other building completion and finishing (SIC 43390); General cleaning of buildings (SIC 81210).
How old is Kostek Ltd?
Kostek Ltd was incorporated on 27 February 2026, less than a year ago.
What is the penalty if Kostek 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 Kostek 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.