- Company number
- 11651534
- Incorporated
- 31 Oct 20187 years trading
- Registered office
- 323 Pettits Lane North, Romford, Essex, RM1 4PH
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Other service activities n.e.c.
Koom Ltd is a 7-year-old private limited company registered in Romford, company number 11651534, one of 911 building contractors in Romford. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £77K (+63.6%) on the year before, to £197K.
- Net assets rose in 6 of 6 year-on-year comparisons on record.
- Current assets of £18K against £37K owed within a year: 0.5 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £197K | £18K | £18K | £37K | 3 |
| 31 Oct 2024 | £120K | £134K | £134K | £5,314 | 3 |
| 31 Oct 2023 | £98K | £56K | £114K | £3,605 | 2 |
| 31 Oct 2022 | £86K | £111K | £112K | £8,440 | 2 |
| 31 Oct 2021 | £54K | £91K | £91K | £14K | 2 |
| 31 Oct 2020 | £1,160 | £41K | £41K | £16K | 2 |
| 31 Oct 2019 | £595 | £2,144 | £2,144 | £1,549 | 2 |
Where Koom Ltd is registered
The registered office is in Romford (RM1), in the Havering local authority area, London. Show RM1 4PH on a map.
Other trade companies in RM1
- Steam & Cool Commercial Engineering LimitedMachinery repair and installation
- Saix LtdSpecialist contractors
- Mega Ark LimitedBuilders
- Damir Auto LtdMotor traders
- Vascobuild LimitedBuilders
- Dream Living Spaces LtdBuilders
- Douglas Windows and Doors LimitedGlaziers
- Sergei SSM Builders LtdFinishing trades
What happens if Koom 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 11651534
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 October 2018 (7 years ago)
- Registered office
- 323 Pettits Lane North, Romford, Essex, RM1 4PH
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Other service activities n.e.c. (SIC 96090) - Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 30 October 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 Romford
Other active building contractors registered in Romford.
- Kostapro Ltd2015
- Kotys Limited2024
- Kristofor Builders Ltd2016
- KS Civils Ltd2022
- Kul London Ltd2022
- L&QH Construction Limited2019
- Laddi Construction Services Ltd2024
- Landmark Living Developers Construction Limited2023
All building contractors in Romford · All trades in Romford · Builders across the UK
Frequently asked questions
When are Koom Ltd's accounts due?
Koom Ltd's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is Koom Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Koom Ltd still trading?
Koom 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 Koom Ltd do?
Koom Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Other service activities n.e.c. (SIC 96090).
How old is Koom Ltd?
Koom Ltd was incorporated on 31 October 2018, 7 years ago.
What is the penalty if Koom 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 Koom 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.