- Company number
- NI656866
- Incorporated
- 5 Nov 20187 years trading
- Registered office
- 18 Market Road, Ballymena, Co. Antrim, BT43 6EL
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
London H2 O Limited is a 7-year-old private limited company registered in Ballymena, company number NI656866, one of 70 building contractors in Ballymena. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 down £997 (-31.5%) on the year before, to £2,170.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £15K against £13K owed within a year: 1.2 times cover.
- 1 employee 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 Mar 2025 | £2,170 | £15K | £13K | 1 | |
| 31 Mar 2024 | £3,167 | £32K | £29K | 1 | |
| 31 Mar 2023 | £8,236 | £26K | £19K | 2 | |
| 31 Mar 2022 | £17K | £41K | £24K | 2 | |
| 31 Mar 2021 | £17K | £43K | £27K | 1 | |
| 31 Mar 2020 | £6,839 | £11K | £6,340 | 2 | |
| 31 Mar 2019 | £600 | £600 |
Where London H2 O Limited is registered
The registered office is in Ballymena (BT43), in the Mid and East Antrim local authority area, Northern Ireland. Show BT43 6EL on a map.
Other trade companies in BT43
- Fyfe Build Solutions LtdBuilders
- Deerfin Properties LtdBuilders
- MTC Media Walls LtdJoiners and carpenters
- BMCL Contracts LtdRoofers
- Icev Pty LtdProperty developers
- GMC Electrical Services (NI) LimitedElectricians
- Braidview Build LtdProperty developers
- Steven Davis Plumbing LtdPlumbers and heating engineers
Also registered at this address
1 other company uses the same registered office as London H2 O Limited.
- Reid Painting & Decorating LimitedPainters and decorators
What happens if London H2 O 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI656866
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 November 2018 (7 years ago)
- Registered office
- 18 Market Road, Ballymena, Co. Antrim, BT43 6EL
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 4 November 2024
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 Ballymena
Other active building contractors registered in Ballymena.
- Lorimer Contracts Limited2016
- Lyle Contracts Ltd2023
- M McErlean Joinery & Construction Ltd2018
- Maffs Construction Ltd2016
- MRM Contracts Uki Ltd2015
- Obr Contracts Ltd2023
- PH Harp Construction Ltd2025
- PMD Contractors Ltd2015
All building contractors in Ballymena · All trades in Ballymena · Builders across the UK
Frequently asked questions
When are London H2 O Limited's accounts due?
London H2 O Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is London H2 O Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is London H2 O Limited still trading?
London H2 O 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 London H2 O Limited do?
London H2 O Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is London H2 O Limited?
London H2 O Limited was incorporated on 5 November 2018, 7 years ago.
What is the penalty if London H2 O 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 London H2 O 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.