- Companies
- Finishing trades
- London
- Koulermos Building Contractors Limited
Koulermos Building Contractors Limited
- Company number
- 12126364
- Incorporated
- 29 Jul 20197 years trading
- Registered office
- 105 Seven Sisters Road, London, N7 7QR
- Nature of business
- Other building completion and finishing
Koulermos Building Contractors Limited is a 7-year-old private limited company registered in London, company number 12126364, one of 3,947 building finishing companies in London. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £3,265 (+5.7%) on the year before, to £61K.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £129K against £92K owed within a year: 1.4 times cover.
- 1 employee 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 |
|---|---|---|---|---|---|
| 31 Jul 2025 | £61K | £124K | £129K | £92K | 1 |
| 31 Jul 2024 | £58K | £132K | £138K | £105K | 1 |
| 31 Jul 2023 | £57K | £114K | £121K | £92K | 1 |
| 31 Jul 2022 | £57K | £133K | £96K | 1 | |
| 31 Jul 2021 | £45K | £85K | £61K | 1 | |
| 31 Jul 2020 | £35K | £48K | £35K | 0 |
Who runs and owns Koulermos Building Contractors Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| Z*** A*** | Director | Jul 2019 |
Person with significant control
Where Koulermos Building Contractors Limited is registered
The registered office is in London (N7), in the Islington local authority area, London. Show N7 7QR on a map.
Other trade companies in N7
- The Armoury Valeting Services LtdMechanics and garages
- Hammers Riggs London LtdScaffolders
- Roni Property Services LtdElectricians
- N1 Window Cleaning LtdCleaning companies
- Claim Lane Accident Management LtdMechanics and garages
- Roofing R Contractors LtdRoofers
- Chocoo LtdMachinery repair and installation
- Lonro QS LtdBuilders
Also registered at this address
17 other companies use the same registered office as Koulermos Building Contractors Limited.
- Aea Builders LtdBuilders
- Ari Electrical Services LimitedElectricians
- Futuro Wood Special Constructions LimitedJoiners and carpenters
- George Mason LtdMotor traders
- Imperial Construction (London) LimitedBuilders
- LNK Construction Co LimitedCivil engineering
- M D Heating (London) LimitedPlumbers and heating engineers
- Marvel Electrical LimitedElectricians
- McVicker Building Services (UK) LtdBuilders
- Pedoulas Estates LimitedProperty developers
- Serforce LimitedBuilders
- Sureheat (UK) LimitedPlumbers and heating engineers
- T & I Facilities LimitedElectricians
- T. Zabetas LimitedFinishing trades
- Tsar Building Supplies LimitedSpecialist contractors
- Tyretec Trading UK LimitedMotor traders
- Umfreville Properties LimitedFinishing trades
What happens if Koulermos Building Contractors Limited 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 12126364
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 July 2019 (7 years ago)
- Registered office
- 105 Seven Sisters Road, London, N7 7QR
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 28 July 2025
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.
- Kowalsky Ltd2017
- Koylink Services Ltd2026
- Kozak Pro Solutions Ltd2026
- Kozen Ltd2026
- KPM Solution Limited2026
- KQ Building Ltd2014
- Kraja Ltd2015
- Kraman Limited2006
All building finishing companies in London · All trades in London · Finishing trades across the UK
Frequently asked questions
When are Koulermos Building Contractors Limited's accounts due?
Koulermos Building Contractors Limited's next accounts are due at Companies House by 30 April 2027 (in 198 days), covering the period to 31 July 2026.
When is Koulermos Building Contractors Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Koulermos Building Contractors Limited still trading?
Koulermos Building Contractors Limited 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 Koulermos Building Contractors Limited do?
Koulermos Building Contractors Limited is registered under Other building completion and finishing (SIC 43390).
How old is Koulermos Building Contractors Limited?
Koulermos Building Contractors Limited was incorporated on 29 July 2019, 7 years ago.
Who runs Koulermos Building Contractors Limited?
Koulermos Building Contractors Limited has 1 active director, the longest-serving appointed in Jul 2019. Their names and service addresses are on the Companies House register.
Who owns Koulermos Building Contractors Limited?
One person or company has significant control of Koulermos Building Contractors Limited: an individual (owns 75% or more of the shares).
What is the penalty if Koulermos Building Contractors Limited 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 Koulermos Building Contractors Limited 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.